{ "url": "https://openlegislation.uk/nuclear-safeguards-eu-exit-regulations-2019/schedule-1/part-3", "json_url": "https://openlegislation.uk/nuclear-safeguards-eu-exit-regulations-2019/schedule-1/part-3.json", "legislation": "uksi/2019/196", "legislation_title": "The Nuclear Safeguards (EU Exit) Regulations 2019", "legislation_url": "https://openlegislation.uk/nuclear-safeguards-eu-exit-regulations-2019", "path": "schedule/1/part/3", "kind": "part", "number": "3", "heading": "MATERIAL BALANCE REPORT (MBR)", "text": "Label/tag\nContent\nComments\n#\nMBA\nCharacter (4)\nMBA code of reporting MBA\n1\nReport type\nCharacter (1)\nM for Material Balance Report\n2\nReport date\nDDMMYYYY\nDate on which the report was completed\n3\nStart report\nDDMMYYYY\nStarting date of MBR (date of last PIT +1 day)\n4\nEnd report\nDDMMYYYY\nEnd date of MBR (date of current PIT)\n5\nReport number\nNumber (8)\nSequential number, no gaps\n6\nElement category\nCharacter (1)\nCategory of qualifying nuclear material\n7\nLine count\nNumber (8)\nTotal number of lines reported\n8\nReporting person\nCharacter (30)\nName of person responsible for report\n9\nIC code\nCharacter (2)\nType of inventory change\n10\nLine number\nNumber (8)\nSequential number, no gaps\n11\nElement weight\nNumber (24.3)\nElement weight\n12\nIsotope\nCharacter (1)\nG for U-235, K for U-233, J for a mixture of U-235 and U-233\n13\nFissile weight\nNumber (24.3)\nWeight of fissile isotope\n14\nObligation\nCharacter (2)\nSafeguards obligation\n15\nCorrection\nCharacter (1)\nD for deletions, A for additions forming part of a deletion/addition pair, L for late lines (stand-alone additions)\n16\nPrevious report\nNumber (8)\nReport number of line to be corrected\n17\nPrevious line\nNumber (8)\nLine number of line to be corrected\n18\nComment\nCharacter (256)\nOperator comment\n19\nCRC\nNumber (20)\nHash code of line for quality control purposes\n20\nPrevious CRC\nNumber (20)\nHash code of line to be corrected\n21\nExplanatory notes\n1.\nMBA:\nCode of the reporting material balance area. This code is notified to the qualifying nuclear facility concerned by the ONR.\n2.\nREPORT TYPE:\nM for material balance reports.\n3.\nREPORT DATE:\nDate on which the report was completed.\n4.\nSTART REPORT:\nStart date of MBR, date of the day immediately following the day of the previous physical inventory taking.\n5.\nEND REPORT:\nEnd date of MBR, date of current physical inventory taking.\n6.\nREPORT NUMBER:\nSequential number, no gaps.\n7.\nELEMENT CATEGORY:\nThe following code for categories of qualifying nuclear material must be used:\nCategory of qualifying nuclear material\nCode\nPlutonium\nP\nHigh enriched uranium\n(20% enrichment and above)\nH\nLow enriched uranium\n(higher than natural but less than 20% enrichment)\nL\nNatural uranium\nN\nDepleted uranium\nD\nThorium\nT\n8.\nLINE COUNT:\nTotal number of lines reported.\n9.\nREPORTING PERSON:\nName of person responsible for report.\n10.\nIC CODE:\nThe different types of inventory information and of inventory change should be entered in the sequence indicated below. The following codes must be used:\nKeyword\nCode\nExamination\nBeginning physical inventory\nPB\nPhysical inventory at the beginning of the reporting period (must be equal to the physical inventory at the end of the previous reporting period).\nInventory changes\n(only codes in the list below)\nFor each type of inventory change, one consolidated line has to be entered for the entire reporting period (first increases, then decreases).\nEnding book inventory\nBA\nBook inventory at the end of the reporting period. It must be equal to the arithmetic sum of the MBR entries above.\nEnding physical inventory\nPE\nPhysical inventory at the end of the reporting period.\nMaterial unaccounted for\nMF\nMaterial unaccounted for. Must be calculated as\n‘ending physical inventory (PE)’\nminus\n‘ending book inventory (BA)’.\nFor inventory changes, one of the following codes must be used:\nKeyword\nCode\nExplanation\nReceipt\nRD\nReceipt of nuclear material from a material balance area within the United Kingdom.\nImport\nRF\nImport of qualifying nuclear material.\nReceipt from non-safeguarded activity\nRN\nReceipt of qualifying nuclear material from a non-safeguarded activity.\nShipment\nSD\nTransfer of nuclear material to a material balance area within the United Kingdom.\nExport\nSF\nExport of qualifying nuclear material.\nShipment to non-safeguarded activity\nSN\nTransfer of qualifying nuclear material to a non-safeguarded activity.\nTransfer to conditioned waste\nTC\nQualifying 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.\nDiscards to the environment\nTE\nQualifying 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.\nTransfer to retained waste\nTW\nQualifying 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.\nRetransfer from conditioned waste\nFC\nRetransfer of conditioned waste to the inventory of the material balance area. This applies whenever conditioned waste undergoes processing.\nRetransfer from retained waste\nFW\nRetransfer 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.\nAccidental\nloss\nLA\nIrretrievable and inadvertent loss of a quantity of qualifying nuclear material as the result of an operational accident. Use of this code in the MBR is only allowed if a special report was sent to the ONR when the inventory change occurred or became known.\nAccidental\ngain\nGA\nQualifying nuclear material unexpectedly found, except when detected in the course of a physical inventory taking. Use of this code in the MBR is only allowed if a special report was sent to the ONR when the inventory change occurred or became known.\nCategory change\nCE\nAccountancy transfer of a quantity of qualifying nuclear material from one category to another as a result of an enrichment process.\nCategory change\nCB\nAccountancy transfer of a quantity of qualifying nuclear material from one category to another as a result of a blending operation.\nCategory change\nCC\nAccountancy 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.\nChange in particular obligation\nBR\nAccountancy transfer of a quantity of qualifying nuclear material from one particular safeguard obligation to another, to balance the total uranium stock following a blending operation.\nChange in particular obligation\nPR\nAccountancy transfer of a quantity of qualifying nuclear material from one particular safeguard obligation to another, used when qualifying nuclear material enters or leaves an accountancy pool.\nChange in particular obligation\nSR\nAccountancy transfer of a quantity of qualifying nuclear material from one particular safeguard obligation to another, following an obligation exchange or a substitution.\nChange in particular obligation\nCR\nAccountancy transfer of a quantity of qualifying nuclear material from one particular safeguard obligation to another, for all cases not covered by codes BR, PR or SR.\nNuclear production\nNP\nIncrease in the quantity of qualifying nuclear material due to nuclear transformation.\nNuclear loss\nNL\nDecrease in the quantity of qualifying nuclear material due to nuclear transformation.\nShipper/\nreceiver difference\nDI\nShipper/receiver difference.\nNew measurement\nNM\nQuantity of qualifying nuclear material, in one particular batch, accounted for in the qualifying 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.\nBalance adjustment\nBJ\nQuantity 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.\nRoundings\nRA\nRounding adjustment to make the sum of the quantities reported in a given period coincide with the ending book inventory of the material balance area.\nIsotope adjustment\nR5\nAdjustment to make the sum of the isotope quantities reported coincide with the ending book inventory for U-235 of the material balance area.\nMaterial production\nMP\nQuantity 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.\nTermination of use\nTU\nQuantity 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:\n(i)\nincorporated in end products used for non-nuclear purposes; or\n(ii)\ncontained in waste in very low concentrations measured or estimated on the basis of measurements, even if these materials are not discarded to the environment.\nThe quantity of qualifying nuclear material involved is to be subtracted from the inventory of the material balance area.\n11.\nLINE NUMBER:\nSequential number starting with 1, no gaps.\n12.\nELEMENT WEIGHT:\nThe weight of the element category referred to in field 7 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.\n13.\nISOTOPE:\nThis code indicates the kind of fissile isotopes involved and should be used when the weight of fissile isotopes is reported. Use the code G for U-235, K for U-233, and J for a mixture of U-235 and U-233.\n14.\nFISSILE WEIGHT:\nUnless 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.\n15.\nOBLIGATION:\nIndication 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.\n16.\nCORRECTION:\nCorrections have to be made by deleting the wrong line(s) and adding the correct one(s), where appropriate. The following codes must be used:\nCode\nExplanation\nD\nDeletion. The line to be deleted must be identified by indicating in field 17 the report number (6), in field 18 the line number (11) and in field 21 the CRC (20) which were declared for the original line. Other fields need not be reported.\nA\nAddition (forming part of a deletion/addition pair). The correct line must be reported with all data fields, including the ‘previous report’ field (17) and the ‘previous line’ field (18). The ‘previous line’ field (18) must repeat the line number (11) of the line being replaced by the deletion/addition pair.\nL\nLate line (stand-alone addition). The late line to be added must be reported with all data fields, including the ‘previous report’ field (17). The ‘previous report’ field (17) must contain the report number (6) of the report in which the late line should have been included.\n17.\nPREVIOUS REPORT:\nIndicate the report number (6) of the line to be corrected.\n18.\nPREVIOUS LINE:\nFor deletions, or additions forming part of a deletion/addition pair, indicate the line number (11) of the line to be corrected.\n19.\nCOMMENT:\nFree-text comment field for short comments by operator.\n20.\nCRC:\nHash code of line for quality control purposes. The ONR must inform the operator of the algorithm to be used.\n21.\nPREVIOUS CRC:\nHash code of the line to be corrected.\nGENERAL REMARKS CONCERNING THE COMPLETION OF THE REPORTS\nGeneral remarks 2, 3, 4, 5 and 6 at the end of Part 2 apply to this Part as appropriate.\nThis form, duly completed and signed, must be sent to the ONR in accordance with regulation 35.", "extent": "E+W+S+N.I.", "status": null, "version": "current", "annotations": [ { "type": "F", "label": "F1", "text": "Words in Sch. 1 Pt. 3 table substituted (10.7.2026) by The Nuclear Safeguards (EU Exit and Fees) (Amendment) Regulations 2026 (S.I. 2026/835), regs. 1(2), 31(4)(a)" }, { "type": "F", "label": "F2", "text": "Word in Sch. 1 Pt. 3 table substituted (10.7.2026) by The Nuclear Safeguards (EU Exit and Fees) (Amendment) Regulations 2026 (S.I. 2026/835), regs. 1(2), 31(4)(b)" }, { "type": "F", "label": "F3", "text": "Words in Sch. 1 Pt. 3 table substituted (10.7.2026) by The Nuclear Safeguards (EU Exit and Fees) (Amendment) Regulations 2026 (S.I. 2026/835), regs. 1(2), 31(4)(c)" }, { "type": "I", "label": "I1", "text": "Sch. 1 Pt. 3 in force at 31.12.2020 on IP completion day (in accordance with 2020 c. 1, Sch. 5 para. 1(1)), see reg. 1(2)" } ], "outstanding_effects": [], "provenance": { "source": "legislation.gov.uk", "source_url": "https://www.legislation.gov.uk/uksi/2019/196/schedule/1/part/3", "retrieved_at": "2026-10-28T22:47:53.588698+00:00" }, "licence": "Open Government Licence v3.0", "licence_url": "https://www.nationalarchives.gov.uk/doc/open-government-licence/version/3/", "attribution": "Contains public sector information licensed under the Open Government Licence v3.0. Source: legislation.gov.uk, The National Archives." }