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Category:Letter
MONTHYEARML24276A1062024-10-0101 October 2024
Us Dept of Commerce, National Institute of Standards and Technology - Sec Charter Update Response
ML24270A0052024-09-25025 September 2024
NCNR Director Appointment Update
ML24166A1992024-06-11011 June 2024
NIST - Second Nuclear Safety Culture Assessment Report
ML24113A0842024-05-30030 May 2024
Examination Result Letter No. 50-184/OL-24-01, National Institute of Standards and Technology
ML24113A0832024-05-30030 May 2024
Examination Report Letter No. 50-184/OL-24-01, National Institute of Standards and Technology
ML24144A1002024-05-21021 May 2024
Submittal of Leadership Accountability, Sec Charter Update Response
ML24127A0012024-04-24024 April 2024
Us Dept of Commerce, National Institute of Standards & Technology (NIST) - Transmittal of Operations Report No. 76 for the Nbsr for the Year 2023
ML24089A2512024-04-10010 April 2024
Examination Confirmation Letter No 50-184/OL 24-01 National Institute of Standards and Technology
ML24102A2692024-04-0505 April 2024
National Institute of Standards and Technology Reactor (Nbsr) - Operations Report No. 74 for the the Period January 1, 2023 to December 31, 2023
ML24088A1342024-03-28028 March 2024
Us Dept. of Commerce, NIST - Non-Availability of Fuel and Funding to Convert Nbsr from HEU to LEU in 2024
ML24075A2992024-03-15015 March 2024
National Institute of Standards and Technology - Withdrawal of Recommended Modifications to the NIST Confirmatory Order Request
ML24065A4652024-03-0707 March 2024
NIST – Request for Additional Information to Support Review of the Requested Modifications to the NIST Confirmatory Order EA-21-148
ML24064A1992024-03-0101 March 2024
Us Dept. of Commerce, National Institute of Standards & Technology (NIST) - Change to the Nbsr Requalification Plan in Response to an NRC Request for Additional Information (ADAMS Accession No. ML22223A146)
ML24054A3682024-02-22022 February 2024
Recommended Modifications to the NIST Confirmatory Order
IR 05000184/20232012024-01-25025 January 2024
National Institute of Standards and Technology - U.S. Nuclear Regulatory Commission 1st and 2nd Quarter Supplemental Inspection Report 05000184/2023201
ML24023A6182024-01-23023 January 2024
Us Dept. of Commerce, National Institute of Standards & Technology - Nuclear Program Assessments Response and Leadership Accountability
ML23257A1982023-12-26026 December 2023
Examination Report No. 50-184/OL-23-02, National Institute of Standards and Technology
ML23257A1972023-12-26026 December 2023
Examination Results Letter No. 50-184/OL-23-02, National Institute of Standards and Technology
ML23306A1642023-11-0202 November 2023
Examination Report Letter No. 50-182/OL-24-01, University of Missouri - Columbia
ML23306A1652023-11-0202 November 2023
Examination Result Letter No. 50-184/OL-24-01, University of Missouri - Columbia
ML23207A0402023-07-26026 July 2023
Us Dept. of Commerce, National Institute of Standards & Technology, Nuclear Safety Culture Assessment and Response
ML23195A1042023-07-12012 July 2023
NIST Center for Neutron Research (Ncnr), Withdrawal of License Amendment Request of December 11, 2020
ML23104A3002023-04-10010 April 2023
U.S. Dept. of Commerce, National Institute of Standards & Technology (Nist), Transmitted Herewith Is Operations Report No. 74 for the Nbsr for the Cy 2022
ML23089A1132023-03-30030 March 2023
Us Dept. of Commerce - National Institute of Standards & Technology - Non-Availability of Fuel and Funding to Convert Nbsr from HEU to LEU in 2021
ML23086B3832023-03-27027 March 2023
Us Dept. of Commerce, National Institute of Standards & Technology (NIST) - Change of NCNR Director
ML23040A3372023-03-0909 March 2023
NIST Restart Authorization Letter
ML23059A0502023-03-0707 March 2023
Examination Confirmation Letter No. 50-184/OL-23-02, National Institute of Standards and Technology
IR 05000184/20222022023-03-0707 March 2023
National Institute of Standards and Technology – U.S. Nuclear Regulatory Commission 4th 2022 Quarter Supplemental Inspection Report 05000184/2022202
ML23055A3002023-03-0303 March 2023
NIST License Amendment 15 - Core Alternative Reload Methodology Scheme
ML23020A9112023-02-0101 February 2023
National Institute of Standards and Technology – Issuance of Amendment No. 14 to Renewed Facility Operating License No. TR 5
ML23033A1152023-02-0101 February 2023
Us Dept. of Commerce, National Institute of Standards & Technology, License Amendment Request
IR 05000184/20222032023-01-27027 January 2023
National Institute of Standards and Technology - U.S. Nuclear Regulatory Commission Security Inspection Report 05000184/2022203
ML22350A0652022-12-13013 December 2022
Us Dept. of Commerce, National Institute of Standards & Technology (Nist), License Amendment Request
ML22322A2182022-11-28028 November 2022
National Institute of Standards and Technology - Report on the Regulatory Audit Re Restart Request Following Exceedance of Cladding Temperature Safety Limit
ML22322A2112022-11-17017 November 2022
NIST Center for Neutron Research, License Amendment Request. Response to NRC Questions Regarding the Primary and Effluent Monitoring Systems
ML22293B8082022-10-19019 October 2022
National Institute of Standards & Technology (NIST) - License Amendment Request
ML22235A1172022-08-23023 August 2022
Us Dept of Commerce, National Institute of Standards & Technology, Transmittal of Draft of a Proposed Presentation of 02/03/2021, Nbsr Event for NRC Review
ML22227A1502022-08-15015 August 2022
Us Dept of Commerce, National Institute of Standards & Technology (Nist), Request NRC Permission to Restart the Reactor Upon Completion of Listed Corrective Actions and Recovery Efforts
ML22223A1462022-08-11011 August 2022
Docket Number 50-184 and the Nbsr Requalification Plan
ML22206A2132022-08-0101 August 2022
Letter to National Institute of Standards and Technology, Center for Neutron Research - Confirmatory Order (EA-21-148)
ML22206A0102022-08-0101 August 2022
U.S. Nuclear Regulatory Commission Supplemental Inspection Plan for National Institute of Standards and Technology
ML22181A1282022-07-21021 July 2022
National Institute of Standards and Technology - Issuance of Amendment No. 13 to Renewed Facility Operating License No. TR-5
ML22187A1272022-06-29029 June 2022
Nbsr Restart Request
ML22160A2852022-06-0808 June 2022
Nbsr License Amendment Request Supplement
ML22122A0882022-04-27027 April 2022
Letter for T. H. Newton, NIST Center for Neutron Research, from J. S. Bowen, Nrc/Nrr/Danu, NRC Office of Investigations Report No. 1-2022-005 - Release of OI Synopsis
ML22094A1082022-04-0404 April 2022
Transmittal of Operations Report No. 74 for the Nbsr for January 1, 2021 to December 31, 2021
ML22084A4082022-03-30030 March 2022
NIST - Non-availability of Fuel and Funding to Convert Nbsr from HEU to LEU in 2021
IR 05000184/20222012022-03-16016 March 2022
National Institute of Standards and Technology - Us Nuclear Regulatory Commission Special Inspection Report No 05000184-2022201
ML22012A0902022-01-11011 January 2022
Nbsr License Amendment Request, Revised No Significant Hazard Consideration Determination
ML21349A3772022-01-0404 January 2022
December 7, 2021, Summary of Mtg with Nist to Discuss Proposed Technical Specification Changes at the National Bureau of Standards Reactor EPID L-2021-LLN-0000
2024-09-25
[Table view]
Category:Written Event Report (30 or 60 day)
MONTHYEARML21133A2662021-05-13013 May 2021
Us Dept. of Commerce, National Institute of Standards & Technology, Follow-Up to Event Report
ML21064A5232021-03-0505 March 2021
NIST Event Report 55094 of NCNR Safety Limit Exceeded on February 3, 2021 Due to Detection of Fission Products Upon Reactor Startup
ML21048A1492021-02-16016 February 2021
Report of NCNR Declaration of Alert
2021-05-13
[Table view] |
Text
March 5, 2021 Document Control Desk U.S. Nuclear Regulatory Commission Washington, DC 20555-0001
Subject:
Report ofNCNR safety limit exceeded UNITED STATES DEPARTMENT OF COMMERCE National Institute of Standards and Technology Gaithersburg, Maryland 20899-Ref: NRC Event 55094, Docket 50-184, Facility License TR-5 Sirs and Madams:
This is a follow up to the above referenced event report of an occurrence on February 3, 2021 in which the NCNR reported a detection of fission products upon reactor startup.
Review of in-core video footage and evaluation of samples from the primary coolant has led us to conclude that a single fuel element is damaged, that parts of that element likely exceeded the fuel safety limit of 450 °C as specified in TS 2.1, and that all consequences of this incident are well bounded by the analysis of the Maximum Hypothetical Accident in the NBSR Safety Analysis Report. Although there has been no new occurrence and reactor conditions remain quiescent, we have opted to report the safety limit conclusion to the NRC in accordance with TS 6.6.1(3). This was reported by telephone to the NRC Operations Center on March 2, 2021, and we are submitting this 14-day written report, both in accordance with TS 6.7.2(1)(b).
It should be noted that a complete evaluation of the extent of conditions in the fuel element will likely take several months. As stated in our report of February 16, 2021, during the event all reactor protection systems worked as designed. Determination of the root cause of this event remains under investigation and corrective actions will be implemented and shared with the NRC before we ask for authorization for reactor restart.
This report has been reviewed by the NCNR Safety Evaluation Committee in accordance with TS 6.6.1(3). Please feel free to contact the undersigned if you have any questions.
Respectfully submitted, Robert Dimeo Director NIST Center for Neutron Research Thomas Newton Deputy Director and Chief of Reactor Operations and Engineering NIST Center for Neutron Research NISI