The Nuclear Safeguards (EU Exit) Regulations 2019

Regulation 15

PART 3 U.K. MATERIAL BALANCE REPORT (MBR)

Commencement Information

I1 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)

Label/tag			Content				Comments		#
MBA			Character (4)				MBA code of reporting MBA		1
Report type			Character (1)				M for Material Balance Report		2
Report date			DDMMYYYY				Date on which the report was completed		3
Start report			DDMMYYYY				Starting date of MBR (date of last PIT +1 day)		4
End report			DDMMYYYY				End date of MBR (date of current PIT)		5
Report number			Number (8)				Sequential number, no gaps		6
Element category			Character (1)				Category of qualifying nuclear material		7
Line count			Number (8)				Total number of lines reported		8
Reporting person			Character (30)				Name of person responsible for report		9
IC code			Character (2)				Type of inventory change		10
Line number			Number (8)				Sequential number, no gaps		11
Element weight			Number (24.3)				Element weight		12
Isotope			Character (1)				G for U-235, K for U-233, J for a mixture of U-235 and U-233		13
Fissile weight			Number (24.3)				Weight of fissile isotope		14
Obligation			Character (2)				Safeguards obligation		15
Correction			Character (1)				D for deletions, A for additions forming part of a deletion/addition pair, L for late lines (stand-alone additions)		16
Previous report			Number (8)				Report number of line to be corrected		17
Previous line			Number (8)				Line number of line to be corrected		18
Comment			Character (256)				Operator comment		19
CRC			Number (20)				Hash code of line for quality control purposes		20
Previous CRC			Number (20)				Hash code of line to be corrected		21

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: M for material balance reports.
3.	REPORT DATE: Date on which the report was completed.
4.	START REPORT: Start date of MBR, date of the day immediately following the day of the previous physical inventory taking.
5.	END REPORT: End date of MBR, date of current physical inventory taking.
6.	REPORT NUMBER: Sequential number, no gaps.
7.	ELEMENT CATEGORY: The following code for categories of qualifying nuclear material 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

8.	LINE COUNT: Total number of lines reported.
9.	REPORTING PERSON: Name of person responsible for report.
10.	IC CODE: The different types of inventory information and of inventory change should be entered in the sequence indicated below. The following codes must be used:

	Keyword				Code		Examination
	Beginning physical inventory				PB		Physical inventory at the beginning of the reporting period (must be equal to the physical inventory at the end of the previous reporting period).
	Inventory changes (only codes in the list below)						For each type of inventory change, one consolidated line has to be entered for the entire reporting period (first increases, then decreases).
	Ending book inventory				BA		Book inventory at the end of the reporting period. It must be equal to the arithmetic sum of the MBR entries above.
	Ending physical inventory				PE		Physical inventory at the end of the reporting period.
	Material unaccounted for				MF		Material unaccounted for. Must be calculated as ‘ending physical inventory (PE)’ minus ‘ending book inventory (BA)’.
	For inventory changes, one of the following codes must be used:
	Keyword					Code	Explanation
	Receipt					RD	Receipt of nuclear material from a 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 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 has been transferred to a specific location within the material balance area from which it could be retrieved. 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 in the MBR is only allowed if a special report was sent to the ONR when the inventory change occurred or became known.
	Accidental gain					GA	Qualifying 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.
	Category change					CE	Accountancy transfer of a quantity of qualifying nuclear material from one category to another as a result of an enrichment process.
	Category change					CB	Accountancy transfer of a quantity of qualifying nuclear material from one category to another as a result of a blending operation.
	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.
	Change in particular obligation					BR	Accountancy 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.
	Change in particular obligation					PR	Accountancy 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.
	Change in particular obligation					SR	Accountancy transfer of a quantity of qualifying nuclear material from one particular safeguard obligation to another, following an obligation exchange or a substitution.
	Change in particular obligation					CR	Accountancy 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.
	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 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.
	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 plant operator for his own purposes (without reporting a physical inventory listing to the ONR) and the book inventory established on the same date.
	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 considered as irrecoverable for practical or economic reasons 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.

11.	LINE NUMBER: Sequential number starting with 1, no gaps.
12.	ELEMENT WEIGHT: The 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.
13.	ISOTOPE: This 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.
14.	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.
15.	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.
16.	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 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.
	A		Addition (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.
	L		Late 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.

17.	PREVIOUS REPORT: Indicate the report number (6) of the line to be corrected.
18.	PREVIOUS LINE: For deletions, or additions forming part of a deletion/addition pair, indicate the line number (11) of the line to be corrected.
19.	COMMENT: Free-text comment field for short comments by operator.
20.	CRC: Hash code of line for quality control purposes. The ONR must inform the operator of the algorithm to be used.
21.	PREVIOUS CRC: Hash code of the line to be corrected.
GENERAL REMARKS CONCERNING THE COMPLETION OF THE REPORTS General remarks 2, 3, 4, 5 and 6 at the end of Part 2 apply to this Part as appropriate.
This form, duly completed and signed, must be sent to the ONR in accordance with regulation 35.