# The Nuclear Safeguards (EU Exit) Regulations 2019, Part 2: INVENTORY CHANGE REPORT

Extent: E+W+S+N.I.

Label/tag
Content
Comments
#
MBA
Character (4)
MBA code of reporting MBA
1
Report type
Character (1)
I for Inventory Change Report
2
Report date
DDMMYYYY
Date on which the report was completed
3
Report number
Number (8)
Sequential number, no gaps
4
Line count
Number (8)
Total number of lines reported
5
Start report
DDMMYYYY
Date of first day in reporting period
6
End report
DDMMYYYY
Date of last day in reporting period
7
Reporting person
Character (30)
Name of person responsible for the report
8
Transaction ID
Number (8)
Sequential number
9
IC code
Character (2)
Type of inventory change
10
Batch
Character (20)
Unique identifier for a batch of qualifying nuclear material
11
KMP
Character (1)
Key measurement point
12
Measurement
Character (1)
Measurement code
13
Material form
Character (2)
Material form code
14
Material container
Character (1)
Material container code
15
Material state
Character (1)
Material state code
16
MBA from
Character (4)
MBA code of shipping MBA (for IC codes RD and RF only)
17
MBA to
Character (4)
MBA code of receiving MBA (for IC codes SD and SF only)
18
Previous batch
Character (20)
Name of previous batch (for IC code RB only)
19
Original date
DDMMYYYY
Accounting date of the line to be corrected (always of first line in correction chain)
20
PIT date
DDMMYYYY
Date of physical inventory taking (PIT) to which MF adjustment refers (use with IC code MF only)
21
Line number
Number (8)
Sequential number, no gaps
22
Accounting date
DDMMYYYY
Date on which the inventory change occurred or became known
23
Items
Number (6)
Number of items
24
Element category
Character (1)
Category of qualifying nuclear material
25
Element weight
Number (24.3)
Element weight
26
Isotope
Character (1)
G for U-235, K for U-233, J for a mixture of U-235 and U-233
27
Fissile weight
Number (24.3)
Weight of fissile isotope
28
Isotopic composition
Character (130)
U, Pu isotopic weight (only if agreed in particular safeguard provisions)
29
Obligation
Character (2)
Safeguards obligation
30
Previous category
Character (1)
Previous category of qualifying nuclear material (use for IC codes CB, CC and CE only)
31
Previous obligation
Character (2)
Previous obligation (use for IC codes BR, CR, PR and SR only)
32
Document
Character (70)
Operator-defined reference to supporting documents
33
Container ID
Character (20)
Operator-defined identifier for the container
34
Correction
Character (1)
D for deletions, A for additions forming part of a deletion/addition pair, L for late lines (stand-alone additions)
35
Previous report
Number (8)
Report number of line to be corrected
36
Previous line
Number (8)
Line number of line to be corrected
37
Comment
Character (256)
Operator comment
38
Burn-up
Number (6)
Burn-up in MW days/tonne (use for IC codes NL and NP in nuclear reactors only)
39
CRC
Number (20)
Hash code of line for quality control purposes
40
Previous CRC
Number (20)
Hash code of line to be corrected
41
Advance notification
Character (8)
Reference to advance notification sent to the ONR (use for IC codes ... RF, ... SN and SF only)
42
Campaign
Character (12)
Campaign identifier for qualifying nuclear facilities which carry out reprocessing
43
Reactor
Character (12)
Reactor code for reprocessing campaigns
44
Error path
Character (8)
Special code for evaluation purposes
45
Explanatory notes
1.
MBA:
Code of the reporting material balance area. This code is notified to the qualifying nuclear facility concerned by the ONR.
2.
REPORT TYPE:
I for inventory change reports.
3.
REPORT DATE:
Date on which the report was completed.
4.
REPORT NUMBER:
Sequential number, no gaps.
5.
LINE COUNT:
Total number of lines reported.
6.
START REPORT:
Date of first day of reporting period.
7.
END REPORT:
Date of last day of reporting period.
8.
REPORTING PERSON:
Name of person responsible for the report.
9.
TRANSACTION ID:
Sequential number. This is used to identify all inventory change lines relating to the same physical transaction.
10.
IC CODE:
One of the following codes must be used:
Keyword
Code
Explanation
Receipt
RD
Receipt of qualifying nuclear material from material balance area within the United Kingdom.
Import
RF
Import of qualifying nuclear material.
Receipt from non-safeguarded activity
RN
Receipt of qualifying nuclear material from a non-safeguarded activity.
Shipment
SD
Transfer of qualifying nuclear material to a material balance area within the United Kingdom.
Export
SF
Export of qualifying nuclear material.
Shipment to non-safeguarded activity
SN
Transfer of qualifying nuclear material to a non-safeguarded activity.
Transfer to conditioned waste
TC
Qualifying nuclear material contained in waste that is measured or estimated on the basis of measurements, and which has been conditioned in such a way (e.g. in glass, cement, concrete or bitumen) that it is not suitable for further nuclear use. The quantity of qualifying nuclear material involved is to be subtracted from the inventory of the material balance area. Separate records must be kept for this type of material.
Discards to the environment
TE
Qualifying nuclear material contained in waste that is measured or estimated on the basis of measurements, and which has been irrevocably discarded to the environment as the result of a planned discharge. The quantity of qualifying nuclear material involved is to be subtracted from the inventory of the material balance area.
Transfer to retained waste
TW
Qualifying nuclear material generated from processing or from an operational accident contained in waste that is measured or estimated on the basis of measurements, and which is irrecoverable for the time being, but which is stored. The quantity of qualifying nuclear material involved is to be subtracted from the inventory of the material balance area. Separate records must be kept for this type of material.
Retransfer from conditioned waste
FC
Retransfer of conditioned waste to the inventory of the material balance area. This applies whenever conditioned waste undergoes processing.
Retransfer from retained waste
FW
Retransfer of retained waste to the inventory of the material balance area. This applies whenever retained waste is retrieved from the specific location within the material balance area, either for any processing involving the separation of elements in the material balance area or for any shipment from the material balance area.
Accidental loss
LA
Irretrievable and inadvertent loss of a quantity of qualifying nuclear material as the result of an operational accident. Use of this code requires a special report to be sent to the ONR.
Accidental gain
GA
Qualifying nuclear material unexpectedly found, except when detected in the course of a physical inventory taking. Use of this code requires a special report to be sent to the ONR.
Category change
CE
Accountancy transfer of a quantity of qualifying nuclear material from one category to another as a result of an enrichment process (only one line to be reported per category change).
Category change
CB
Accountancy transfer of a quantity of qualifying nuclear material from one category to another as a result of a blending operation (only one line to be reported per category change).
Category change
CC
Accountancy transfer of a quantity of qualifying nuclear material from one category to another for all types of category change not covered by codes CE and CB (only one line to be reported per category change).
Rebatching
RB
Accountancy transfer of a quantity of qualifying nuclear material from one batch to another (only one line to be reported per rebatching).
Change in particular obligation
BR
Accountancy transfer of a quantity of qualifying nuclear material from one particular safeguards obligation to another, to balance the total uranium stock following a blending operation (only one line to be reported per change of obligation).
Change in particular obligation
PR
Accountancy transfer of a quantity of qualifying nuclear material from one particular safeguards obligation to another, used when qualifying nuclear material enters or leaves an accountancy pool (only one line to be reported per change of obligation).
Change in particular obligation
SR
Accountancy transfer of a quantity of qualifying nuclear material from one particular safeguards obligation to another, following an obligation exchange or a substitution (only one line to be reported per change of obligation).
Change in particular obligation
CR
Accountancy transfer of a quantity of qualifying nuclear material from one particular safeguards obligation to another, for all cases not covered by codes BR, PR or SR (only one line to be reported per change of obligation).
Nuclear production
NP
Increase in the quantity of qualifying nuclear material due to nuclear transformation.
Nuclear loss
NL
Decrease in the quantity of qualifying nuclear material due to nuclear transformation.
Shipper/receiver difference
DI
Shipper/receiver difference.
New measurement
NM
Quantity of qualifying nuclear material, in one particular batch, accounted for in the nuclear material balance area, being the difference between a newly measured quantity and the quantity formerly accounted for, and which is neither a shipper/receiver difference nor a correction.
Balance adjustment
BJ
Quantity of qualifying nuclear material accounted for in the material balance area, being the difference between the result of a physical inventory taken by the facility operator for his own purposes (without reporting a physical inventory listing to the ONR) and the book inventory established on the same date.
Material unaccounted for
MF
Book adjustment for material unaccounted for. Must be equal to the difference between the ending physical inventory (PE) and the ending book inventory (BA) reported in the material balance report (Part 4). The original date must be that of the physical inventory taking, while the accounting date must be after the date of the physical inventory taking.
Roundings
RA
Rounding adjustment to make the sum of the quantities reported in a given period coincide with the ending book inventory of the material balance area.
Isotope adjustment
R5
Adjustment to make the sum of the isotope quantities reported coincide with the ending book inventory for U-235 of the material balance area.
Material production
MP
Quantity of qualifying nuclear material, obtained from substances originally not subject to safeguards, which has become subject to safeguards because its concentration now exceeds the minimum levels.
Termination of use
TU
Quantity of qualifying nuclear material in concentrations or chemical forms which make the qualifying nuclear material no longer usable for any nuclear activity relevant for safeguards, or which is considered as practically irrecoverable, and which is:
(i) incorporated in end products used for non-nuclear purposes; or
(ii) contained in waste in very low concentrations measured or estimated on the basis of measurements, even if these materials are not discarded to the environment.
The quantity of qualifying nuclear material involved is to be subtracted from the inventory of the material balance area.
Ending book inventory
BA
Book inventory at the end of a reporting period and at the PIT date, separate for each category of qualifying nuclear material and for each particular safeguard obligation.
11.
BATCH:
The batch designation may be chosen by the operator, but:
(a)
in the case of the inventory change ‘Receipt (RD)’, the batch designation used by the shipper must be reported;
(b)
a batch designation must not be used again for another batch in the same material balance area.
12.
KMP:
Key measurement point. The codes are notified to the qualifying nuclear facility concerned in the particular safeguard provisions or otherwise in writing. If no codes have been specified, ‘&’ should be used.
13.
MEASUREMENT:
The basis on which the quantity of qualifying nuclear material reported was established has to be indicated. One of the following codes must be used:
Measured
Estimated
Explanation
M
E
In the reporting material balance area.
N
F
In another material balance area.
T
G
In the reporting material balance area when the weights have already been given in a previous inventory change report or physical inventory listing.
L
H
In another material balance area when the weights have already been given in a previous inventory change report or physical inventory listing for the present material balance area.
14.
MATERIAL FORM:
The following codes must be used:
Main type of material form
Subtype
Code
Ores
OR
Concentrates
YC
Uranium hexafluoride (UF6)
U6
Uranium tetrafluoride (UF4)
U4
Uranium dioxide (UO2)
U2
Uranium trioxide (UO3)
U3
Uranium oxide (U3O8)
U8
Thorium oxide (ThO2)
T2
Solutions
Nitrate
LN
Fluoride
LF
Other
LO
Powder
Homogeneous
PH
Heterogeneous
PN
Ceramics
Pellets
CP
Spheres
CS
Other
CO
Metal
Pure
MP
Alloys
MA
Fuel
Rods, pins
ER
Plates
EP
Bundles
EB
Assemblies
EA
Other
EO
Main type of material form
Subtype
Code
Sealed sources
QS
Small quantities/samples
SS
Scrap
Homogeneous
SH
Heterogeneous (clean-outs, clinkers, sludges, fines, other)
SN
Solid waste
Hulls
AH
Mixed (plastics, gloves, papers, etc.)
AM
Contaminated equipment
AC
Other
AO
Liquid waste
Low active
WL
Medium active
WM
High active
WH
Conditioned waste
Glass
NG
Bitumen
NB
Concrete
NC
Other
NO
15.
MATERIAL CONTAINER:
The following codes must be used:
Type of container
Code
Cylinder
C
Pack
P
Drum
D
Discrete fuel unit
S
Bird cage
B
Bottle
F
Tank or other container
T
Other
O
16.
MATERIAL STATE
The following codes must be used:
State
Code
Fresh qualifying nuclear material
F
Irradiated qualifying nuclear material
I
Waste
W
Irrecoverable qualifying nuclear material
N
17.
MBA FROM:
Use only for inventory change codes RD and RF. For inventory change code RD, the code of the shipping material balance area is reported. If this code is unknown, the code ‘Q’ is reported and the shipper's full name and address must be entered in the comment field (40). For inventory change code RF, the country code of the exporting state, or the MBA code of the exporting installation if known, is reported, and the shipper's full name and address must be entered in the comment field (40).
18.
MBA TO:
Use only for inventory change codes SD and SF. For inventory change code SD, the code of the receiving material balance area is reported. If this code is unknown, the code ‘Q’ is reported and the receiver's full name and address must be entered in the comment field (40). For inventory change code SF, the country code of the importing state or the MBA code of the importing installation if known, is reported, and the receiver's full name and address must be entered in the comment field (40).
19.
PREVIOUS BATCH:
Batch designation before rebatching. The batch designation after the rebatching must be reported in field 11.
20.
ORIGINAL DATE:
In the case of a correction, the day, month and year when the line to be corrected was originally entered must be reported. For correction chains, the original date is always the accounting date of the first line in the chain. For late lines (stand-alone additions), the original date is the date on which the inventory change occurred.
21.
PIT DATE
Date of the physical inventory taking as reported in the material balance report on which the book adjustment for MUF (material unaccounted for) is based. Use only with inventory change code MF.
22.
LINE NUMBER:
Sequential number starting with 1 in each report, no gaps.
23.
ACCOUNTING DATE:
Day, month and year when the inventory change occurred or became known.
24.
ITEMS:
The number of items making up the batch must be reported. If an inventory change consists of several lines, the sum of the number of items reported must equal the total number of items belonging to the same transaction ID. If the transaction involves more than one element the number of items should be declared in the line(s) for the element category of highest strategic value only (in descending order: P, H, L, N, D, T).
25.
ELEMENT CATEGORY:
The following codes must be used:
Category of qualifying nuclear material
Code
Plutonium
P
High enriched uranium
(20% enrichment and above)
H
Low enriched uranium
(higher than natural but less than 20% enrichment)
L
Natural uranium
N
Depleted uranium
D
Thorium
T
26.
ELEMENT WEIGHT:
The weight of the element category referred to in field 25 must be reported. All weights must be reported in grams. The decimal digits appearing in the accounting lines can be reported up to a maximum of three decimal places.
27.
ISOTOPE:
This code indicates the fissile isotopes involved and should be used when the weight of fissile isotopes is reported (28). Use the code G for U-235, K for U-233, and J for a mixture of U-235 and U-233.
28.
FISSILE WEIGHT:
Unless otherwise stated in the particular safeguard provisions, the weight of fissile isotopes must only be reported for enriched uranium and category changes involving enriched uranium. All weights must be reported in grams. The decimal digits appearing in the accounting lines can be reported up to a maximum of three decimal places.
29.
ISOTOPIC COMPOSITION:
If agreed in the particular safeguard provisions the isotopic composition of U and/or Pu must be reported in the format as a list of weights separated by semi-colons to denote the weight of U-233, U-234, U-235, U-236, U-238 or Pu-238, Pu-239, Pu-240, Pu-241, Pu-242. The decimal digits appearing in the accounting lines can be reported up to a maximum of three decimal places.
30.
OBLIGATION:
Indication of any additional obligation assumed by the United Kingdom under a relevant international agreement, to which the qualifying nuclear material is subject (regulation 19). The ONR may communicate the appropriate codes to the qualifying nuclear facility.
31.
PREVIOUS CATEGORY:
Code of the category of qualifying nuclear material before the category change. The corresponding code after the change must be reported in field 25. Use only with the inventory change codes CE, CB and CC.
32.
PREVIOUS OBLIGATION:
Code of the particular safeguard obligation to which the qualifying nuclear material was subject before the change. The corresponding obligation code after the change must be reported in field 30. Use only with the inventory change codes BR, CR, PR and SR.
33.
DOCUMENT:
Operator-defined reference to supporting document(s).
34.
CONTAINER ID:
Operator-defined container number. Optional data element which can be used in those cases where the container number does not appear in the batch designation.
35.
CORRECTION:
Corrections have to be made by deleting the wrong line(s) and adding the correct one(s), where appropriate. The following codes must be used:
Code
Explanation
D
Deletion. The line to be deleted must be identified by indicating in field 36 the report number (4), in field 37 the line number (22) and in field 41 the CRC 40 which were declared for the original line. Other fields need not be reported.
A
Addition (forming part of a deletion/addition pair). The correct line must be reported with all data fields, including the ‘previous report’ field (36), the ‘previous line’ field (37) and the ‘previous CRC’ field (41). The ‘previous CRC’ field (41) must repeat the line number (22) of the line being replaced by the deletion/addition pair.
L
Late line (stand-alone addition). The late line to be added must be reported with all data fields, including the ‘previous report’ field (36). The ‘previous report’ field (36) must contain the report number (4) of the report in which the late line should have been included.
36.
PREVIOUS REPORT:
Indicate the report number (4) of the line to be corrected.
37.
PREVIOUS LINE:
For deletions, or additions forming part of a deletion/addition pair, indicate the line number (22) of the line to be corrected.
38.
COMMENT:
Free-text comment field for short comments by operator.
39.
BURN-UP:
For inventory changes of type NP or NL in nuclear reactors, burn-up in MW days/tonne.
40.
CRC:
Hash code of line for quality control purposes. The ONR must inform the operator of the algorithm to be used.
41.
PREVIOUS CRC:
Hash code of the line to be corrected.
42.
ADVANCE NOTIFICATION:
Reference code for the advance notification (regulations 21 and 22). Use with inventory changes SF and RF.
43.
CAMPAIGN:
Unique identifier for the reprocessing campaign. Use only for inventory changes in the process material balance area(s) of those qualifying nuclear facilities where spent fuel is reprocessed.
44.
REACTOR:
Unique identifier for the reactor from which irradiated fuel is being stored or reprocessed. Use only for inventory changes in those qualifying nuclear facilities where spent fuel is stored or reprocessed.
45.
ERROR PATH:
Special code describing measurement errors and their propagation, for material balance evaluation purposes. The codes are agreed between the qualifying nuclear facility and the ONR.
GENERAL REMARKS CONCERNING THE COMPLETION OF THE REPORTS
1.
In the case of transfer of qualifying nuclear material, the shipper must provide the receiver with all the necessary information for the inventory change report.
2.
If numerical data contain fractions of units, a point should precede the decimal digits.
3.
The following 55 characters may be used: the 26 capital letters A to Z, figures 0 to 9 and the characters ‘plus’, ‘minus’, ‘slash’, ‘asterisk’, ‘space’, ‘equal’, ‘greater than’, ‘less than’, ‘point’, ‘comma’, ‘open bracket’, ‘close bracket’, ‘colon’, ‘dollar’, ‘percent’, ‘quotation mark’, ‘semi-colon’, ‘question mark’ and ‘ampersand’.
5.
Reports must be prepared according to a world-wide accepted labelled reporting format, agreed between the ONR and operators.
6.
The reports, duly completed and digitally signed, should be forwarded to the ONR in accordance with regulation 35.

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Source: https://www.legislation.gov.uk/uksi/2019/196/schedule/1/part/2 (the official version)
Page: https://openlegislation.uk/nuclear-safeguards-eu-exit-regulations-2019/schedule-1/part-2
Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives.