INTERNATIONAL ATOMIC ENERGY AGENCY 

DEPARTMENT OF SAFEGUARDS

DESIGN INFORMATION 

QUESTIONNAIRE *

IAEA USE ONLY

N-72 (11-2020)

RESEARCH AND POWER REACTORS

APPROVED BY OMB: NO. 3150-0056 EXPIRES: 11/30/2023

Estimated burden per response to comply with this mandatory collection request: 360 hours. NRC is 

required to collect this information for reporting to IAEA from facility licensees appearing on the U.S. 

Eligible List. Send comments regarding burden estimate to the FOIA, Library, and Information 

Collections Branch (T-6 A10M), U.S. Nuclear Regulatory Commission, Washington, DC 20555-0001, 

or by e-mail to Infocollects.Resource@nrc.gov, and the OMB reviewer at: OMB Office of Information 

and Regulatory Affairs, (3150-0056), Attn: Desk Officer for the Nuclear Regulatory Commission, 725 

17th Street NW, Washington, DC 20503; e-mail: oira_submission@omb.eop.gov. The NRC may 

not conduct or sponsor, and a person is not required to respond to, a collection of information unless 

the document requesting or requiring the collection displays a currently valid OMB control number.

The purpose of this document is to 

obtain the facility design information 

required by the Agency in order to 

discharge its safeguards responsibilities. 

It will also serve as a checklist for 

examination of design information by 

Agency inspector(s). If, in any area, 

insufficient space is available add further 

shee ts to the extent necessary.

IAEA USE ONLY 

COUNTRY 

COUNTRY OFFICER

TYPE Research and power reactors 

DATE OF INITIAL DATA

VERIFICATION

LAST REVIEW AND UPDATING
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ALL FACILITIES

GENERAL INFORMATION

1. Name of the facility 

(include usual abbreviation)

2. Location and postal 

address

3. Owner 

(Legally responsible)

4. Operator 

(Legally responsible)

5. Description 

(Main features only)

6. Purpose

7. Status 

(e.g., planned; under construction, 

in operation; shut down; closed 

down; decommissioned)

8. Construction schedule dates 

(if not in operation) 

Start of Construction (MM/DD/YYYY) Commissioning (MM/DD/YYYY) Operation (MM/DD/YYYY)

9. Normal operating mode 

(days only, two shift, three shift; 

number of days/annum, etc.)

10. Facility layout 

(structural containment, fences, 

access, nuclear material storage 

areas, laboratories, waste disposal 

areas, routes followed by nuclear 

material, experimental and test areas, 

etc.) 

DRAWING(S) ATTACHED UNDER REF. NOs.

11. Sitting of facility 

(Maps showing in sufficient detail: 

location, premises and perimeter of 

facility, other buildings, roads, railways, 

rivers, etc.) 

DRAWING(S) AND/OR MAPS ATTACHED UNDER REF. NOs.

12. Names and/or titles and address 

of responsible officers 

(for nuclear material accountancy and 

control and contact with the Agency. If 

possible attach organization charts 

showing position of officers) 
GENERAL REACTOR DATA

13. Facility description 

(indicating important items of 

equipment which use, produce or 

process nuclear material)

GENERAL FLOW DIAGRAM(S) ATTACHED UNDER REF. NOs.

14. Rated thermal output, 

Electricity Output 

(for power reactors)

15. Number of units (reactors) and 

their layout in the facility

16. Reactor type

17. Type of refueling 

(on or off load)

18. Core enrichment range and 

Pu concentration (At equilibrium 

for on-load reactors, initial and 

final for off-load reactors)

19. Moderator

20. Coolant

21. Blanket, reflector

NUCLEAR MATERIAL DESCRIPTION

22. Types of fresh fuel

23. Fresh fuel enrichment 

(U-235) and/or Pu content 

(average enrichment per each type of 

assembly)

24. Nominal weight of fuel in

elements/assemblies 

(with design tolerances)

25. Physical and chemical form of 

fresh fuel 

(General Description) 

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26. Reactor assemblies* 

(Indicate for each type) 

• types of assemblies; 

• number of fuel assemblies, control 

and shim assemblies, experimental 

assemblies in the core, in blanket 

zone(s); 

• number and types of fuel rods/

elements** 

• average enrichment and/or Pu 

content per assembly; 

• general structure; 

• geometric form; 

• dimensions; 

• cladding material 

* Assembly is the combination of 

elements or handling units such as 

cluster or bundle. 

** Element is the smallest contained 

fuel unit.

DRAWING(S) ATTACHED UNDER REF. NOs. 

27. Description of fresh fuel 

elements 

• physical and chemical form of fuel; 

• nuclear material and fissionable 

material and its quantity (with design 

tolerances); 

• enrichment and/or Pu content; 

• geometric form; 

• dimensions; 

• number of slugs/pellets per element; 

• composition of alloy; 

• cladding material (thickness, 

composition of material, bonding)

DRAWING(S) ATTACHED UNDER REF. NOs.

28. Provision for element 

exchange in assemblies of each 

type 

(Indicate whether this is foreseen 

to become a routine operation)

29. Basic operational accounting 

unit(s) 

(Fuel elements/assemblies, etc.)

DRAWING(S) ATTACHED UNDER REF. NOs.

30. Other types of units

31. Means of nuclear material/ 

fuel identification

32. Other nuclear material in 

the facility (Each separately 

identified)

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NUCLEAR MATERIAL DESCRIPTION
NUCLEAR MATERIAL FLOW

33. Schematic flow sheet for 

nuclear material the facility 

(Identifying measurement points, 

accountability areas, inventory 

locations, etc.)

DRAWING(S) ATTACHED UNDER REF. NOs.

34. Inventory state quantity range, 

number of items, and approximate 

uranium enrichment and plutonium 

content for (Under normal operating 

conditions) 

i) Fresh Fuel Storage 

ii) Reactor Core 

iii) Spent Fuel Storage 

iv) Other Locations 

i) Fresh Fuel Storage

ii) Reactor Core

iii) Spent Fuel Storage

iv) Other Locations

35. Load factor 

(Power Reactor Only)

36. Reactor core loading 

(Number of Elements/ 

Assemblies

37. Refueling requirements 

(Quantity, Time Interval)

38. Burn-up 

(Average/maximum)

39. Is the irradiated fuel to be 

reprocessed or stored? 

(If stored, indicate site)

NUCLEAR MATERIAL HANDLING

40. Fresh fuel

iv) Fuel preparation and assay 

room, and reactor loading area 

(description and indication of layout 

and general arrangement)

iii) Capacity of store

ii) Layout, general arrangements 

and storage plan

i) Packaging (description)

 DRAWING(S) ATTACHED UNDER REF. NOs. 

 DRAWING(S) ATTACHED UNDER REF. NOs. 

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42. Routes followed by nuclear 

material 

(fresh fuel, irradiated fuel, blanket, 

other material)

 DRAWING(S) ATTACHED UNDER REF. NOs. 

41. Fuel transfer equipment 

(including refueling machines)

NUCLEAR MATERIAL HANDLING

43. Reactor vessel 

(showing core location, access to 

vessel, vessel openings, fuel handling 

in vessel) 

 DRAWING(S) ATTACHED UNDER REF. NOs. 

 DRAWING(S) ATTACHED UNDER REF. NOs. 

45. Number and size of channels 

for fuel elements or assemblies and 

for control elements in the core

DRAWING(S) ATTACHED UNDER REF. NOs. 

44. Reactor core diagram 

(showing general disposition, lattice, 

form, pitch, dimensions of core, 

reflector, blanket; location, shapes and 

dimensions of fuel elements/

assemblies; control elements/

assemblies; experimental elements/

assemblies)

46. Average mean neutron flux in 

the core:

i) Thermal:

ii) Fast:

47. Instrumentation for measuring 

neutron and gamma 

flux

48. Irradiated fuel

i) Layout, spent fuel storage plan 

and general arrangement (internal 

and external) 

ii) Method of storage

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NUCLEAR MATERIAL HANDLING

iii) Design capacity of storage

iv) Minimum and normal cooling 

period prior to shipment

v) Description of irradiated fuel 

transport equipment and shipping 

cask 

(If no information on site, where is it 

held?)

DRAWING(S) ATTACHED UNDER REF. NOs. 

49. Maximum activity of fuel/blanket 

after refueling 

(at the surface and at a distance of 1 

meter)

50. Methods and equipment for 

handling irradiated fuel 

(except for that already given under 

Qs. 41, 48.v)

51. Nuclear material testing areas 

(except as already given under Q. 40) 

For each such area briefly describe

i) Nature of activities

ii) Major equipment available 

(e.g., hot cell, fuel element decladding 

and dissolution equipment)

iii) Shipping containers Used 

(main-material, scrap and waste)

iv) Storage Areas for both 

unirradiated and irradiated materials

DRAWING(S) ATTACHED UNDER REF. NOs. 

v) Layout and general arrangement

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52. Flow diagram 

(indicating mass flow, temperature and 

pressure at major points, etc.) 

DRAWING(S) ATTACHED UNDER REF. NOs. 

PROTECTION AND SAFETY MEASURES

NUCLEAR MATERIAL ACCOUNTANY AND CONTROL

SPECIMEN FORMS USED IN ALL PROCEDURES ATTACHED UNDER REF. NOs. 

COOLANT DATA

53. Basic measures for physical 

protection of nuclear material

54. Specific health and safety rules 

for inspector compliance 

(if extensive, attach separately) 

55. System description 

Give a description of the nuclear 

material accounting system, of the 

method of recording and reporting 

accountancy data, the procedures for 

account adjustment after inventory, 

and correction of mistakes, etc., under 

the following headings: 

i) General 

(This section should also state what 

general and subsidiary ledgers will be 

used, their form (hard copies, tapes, 

microfilms, etc.) as well as who has the 

responsibility and authority. Source 

data (e.g. shipping and receiving 

forms, the initial recording of 

measurements and measurement 

control sheets) should be identified. 

The procedures for making 

adjustments, the source data and 

records should be covered as well as 

how the adjustments are authorized 

and substantiated.)

ii) Receipts

iii) Shipments

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LIST OF MAJOR ITEMS OF EQUIPMENT REGARDED AS NUCLEAR MATERIAL 

CONTAINERS ATTACHED UNDER REF. NOs.

iv) Physical inventory 

description of procedures, 

scheduled frequency, methods of 

operator's inventory taking (both for 

item and/or mass accountancy), 

including relevant assay methods 

and expected accuracy, access to 

nuclear material, possible 

verification method for irradiated 

nuclear material, methods of 

verification of nuclear material in 

the core

v) Nuclear loss and production 

(Estimation of elements)

vi) Operational records and 

accounts (including method of 

adjustment or correction and 

place preservation and language) 

56. Features related to containment 

and surveillance measures (General 

description)

IF NECESSARY, ATTACH DRAWING(S)

57. For each measurement point of 

accountability areas, 

identified in particular under Qs. 13, 

33, 34, Give the following 

(If applicable) 

For each measurement point fill in 

separate sheet. 

Number of measurement points: 1

i) Description of location, Type, 

identification

ii) Anticipated types of inventory 

change and possibility to use this 

measurement point for physical 

inventory taking

iii) Physical and chemical form of 

nuclear material (with cladding 

materials description)

iv) Nuclear material containers, 

packaging

NUCLEAR MATERIAL ACCOUNTANY AND CONTROL

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NUCLEAR MATERIAL ACCOUNTANY AND CONTROL

v) Sampling procedures and 

equipment used

vi) Measurement method(s) and 

equipment used (item counting, 

neutron flux, power level, nuclear burnup and production, etc.) 

vii) Source and level of accuracy

viii) Technique and frequency of 

calibration of equipment used

ix) Program for the counting 

appraisal of the accuracy of 

methods and techniques used

x) Method of converting source 

data to batch data 

(standard calculative procedures, 

constants used, empirical 

relationships, etc.)

xi) Anticipated batch flow for year 

xii) Anticipated number of items per 

flow and inventory batches

xiii) Type, composition and quantity 

of nuclear material per batch 

(with indication of batch data, total 

weight of each element of nuclear 

material and, in the case of plutonium 

and uranium, the isotopic composition 

when appropriate; form of nuclear 

material) 

xiv) Access to nuclear material and 

its location

xv) Features related to 

containment-surveillance measures 

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OPTIONAL INFORMATION

58. Decommissioning 

schedule dates 

End of operations (MM/DD/YYYY) Decommissioned (MM/DD/YYYY)

59. Facility decommissioning 

plan 

PLAN(s) ATTACHED UNDER REF. NOs 

i) Key events of the 

decommissioning plan

ii) Removal and recovery of 

nuclear material

iii) Removing or rendering 

inoperable of essential equipment

Signature of Responsible Officer

Date (MM/DD/YYYY)

N-72 (11-2020)