Letter Sequence Request |
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EPID:L-2020-NFR-0002, University of California - Davis/Mccellan Nuclear Research Center Reactor Selection and Training Plan for Reactor Personnel (Approved, Closed) |
Results
Other: ML20338A261, ML20338A262, ML21250A366, ML21252A757, ML22041A377, ML22041A378, ML22154A543, ML22154A544, ML22174A293, ML22213A162, ML22213A169, ML22214B829, ML22291A295
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MONTHYEARML20338A2612020-12-10010 December 2020 NRR-106 University of California Davis License Renewal - Audit Questions Project stage: Other ML20338A2622020-12-10010 December 2020 NRR-106 University of California Davis License Renewal - Regulatory Audit Letter and Plan Project stage: Other ML20338A2572020-12-10010 December 2020 University of California Davis License Renewal Regulatory Audit - Plan and Questions Project stage: Request ML21265A5402021-06-24024 June 2021, 22 September 2021, 23 September 2021, 24 September 2021 University of California-Davis - Letter for Response to Request for Supplemental Information Project stage: Request ML21250A3662021-09-14014 September 2021 Regents of the University of California Report on the Regulatory Audit License Renewal Application for the University of California Davis/Mcclellan Nuclear Research Center Triga Nuclear Reactor Project stage: Other ML21269A0012021-09-30030 September 2021 University of California - Davis/Mccellan Nuclear Research Center Reactor Selection and Training Plan for Reactor Personnel Project stage: Request ML21252A7572021-10-0505 October 2021 University of California-Davis/MCCLELLAN - Approval of the Revised Nuclear Radiation Center Selection and Training Plan Project stage: Other ML21316A1162021-11-30030 November 2021 Regents of the University of California - Request for Additional Information Regarding License Renewal Application for the University of California-Davis Mccellan Nuclear Research Center Project stage: RAI ML22038A1402022-02-0808 February 2022 Regents of the University of California - Request for Additional Information Regarding License Renewal Application for the University of California - Davis/Mcclellan Nuclear Research Center Project stage: RAI ML22041A3782022-02-28028 February 2022 Regents of the University of California - Determination of Acceptability and Sufficiency for Docketing and Opportunity for Hearing Regarding the License Renewal Application for the University of California - Davis/Mcclellan Nuclear Research Project stage: Other ML22041A3772022-03-0303 March 2022 License Renewal Application; Docketing; Opportunity to Request a Hearing and Petition for Leave to Intervene; Order Imposing Procedures University of California Davis (FRN) Project stage: Other ML22089A1582022-03-30030 March 2022 UC Davis MNRC Response to NRC Staff Request for Additional Information Regarding Licensing Renewal Application Letter Issued February 8th, 2022 Project stage: Request ML22109A1042022-05-0303 May 2022 Regents of the Univ. of CA - Review of the Physical Security Plan in Support of License Renewal Application for the Univ. of CA-Davis/McCellan Nuclear Research Center Project stage: Approval ML22146A1942022-06-0303 June 2022 Regents of the University of California - RAI Regarding License Renewal Application for the University of California - Davis/Mccellan Nuclear Research Center Project stage: RAI ML22154A5432022-06-0303 June 2022 Univ. of CA - Davis, MNRC Technical Specification in Support of License Renewal Application Project stage: Other ML22154A5442022-06-0303 June 2022 Univ. of CA - Davis, MNRC Submittal of Technical Specification in Support of License Renewal Application Project stage: Other ML22173A2012022-06-21021 June 2022, 22 June 2022, 30 June 2022 Response to NRC Request for Additional Information Letter Dated June 3rd 2022 Regarding License Renew Al Application for the University of California - Davis/Mcclellan Nuclear Research Center Project stage: Request ML22173A2032022-06-21021 June 2022 University of California - Davis, Response to NRC Request for Additional Information Letter Dated June 3rd 2022 Regarding License Renew Al Application - Appendix B, Radiological Impact of Accidents Project stage: Response to RAI ML22172A1972022-06-21021 June 2022 UC Davis MNRC Submission of Technical Specification in Support of License Renewal Application Project stage: Request ML22173A2022022-06-22022 June 2022 Response to NRC Request for Additional Information Letter Dated June 3rd 2022 Regarding License Renew Al Application for the University of California - Davis/Mcclellan Nuclear Research Center Project stage: Response to RAI ML22174A2932022-06-28028 June 2022 Regents of the University of California - Report on the Regulatory Audit License Renewal Application for the University of California - Davis/Mcclellan Project stage: Other ML22173A2042022-06-30030 June 2022 University of CA, Davis, MNRC-0001-DOC-10, Emergency Plan Project stage: Request ML22181B0822022-06-30030 June 2022 University of California-Davis/McClellan Nuclear Research Center, Response to NRC Request for Additional Information Letter Dated June 24th, 2022 Regarding License Renewal Application Project stage: Response to RAI ML22213A1692022-10-18018 October 2022 Regents of the University of California - Environmental Assessment and Finding of No Significant Impact Regarding Renewal of Facility Operating License No. R-130 for the University of California - Davis/Mcclellan Nuclear Research Center Project stage: Other ML22213A1622022-10-18018 October 2022 FRN Re UCD-MNRC Environment Assessment Project stage: Other ML22213A1632022-10-18018 October 2022 Ucd License Renewal Environmental Assessment FRN Pkg Project stage: Request ML22214B8312022-11-21021 November 2022 NRC Safety Evaluation for UC Davis 7.5.22 Project stage: Approval ML22214B8282022-11-21021 November 2022 University of California Davis License Renewal Issuance Package Project stage: Request ML22291A2952022-11-21021 November 2022 Proposed MNRC Tech Specs 10182022 Project stage: Other ML22214B8302022-11-21021 November 2022 FRN - Issuance of Renewed Facility Operating License No. R-130 Project stage: Approval ML22214B8292022-11-21021 November 2022 Letter to Ucd with Renewed Facility Operating License Project stage: Other 2022-02-28
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Category:Letter
MONTHYEARML24032A1352024-02-0101 February 2024 Examination Confirmation Letter No. 50-607/OL-24-01, University of California-Davis ML23332A7062023-11-27027 November 2023 University of California, Davis Mcclellan Nuclear Research Center (MNRC) License Holder Appointment ML23263A9762023-09-22022 September 2023 Regents of the Ucd Issuance of Amendment No. 10 to Renewed Facility Operating License R-130 ML23262B5202023-09-19019 September 2023 University of California Davis Mcclellan Nuclear Research Center (Mnrc), Docket Number 50-607, License Number R-130, Supplement to License Amendment Request 2023-02 ML23258A2422023-09-15015 September 2023 University of California Davis Mcclellan Nuclear Research Center (Mnrc), Docket Number 50-607, License Number R-130, License Amendment Request 2023-02 ML23222A1872023-08-10010 August 2023 Univ. of California, Davis, 14-Day Written Follow-up to Call Made to the HOO (EM 56643) on July 28th 2023 ML23095A0652023-03-14014 March 2023 American Nuclear Insurers, Notice of Cancellation Rescinded ML23045A0452023-03-0202 March 2023 Regents of the University of California - Issuance of Amendment No. 9 to Renewed Facility Operating License No. R-130 to Amend the Technical Specifications for the University of California - Davis/Mcclellan Nuclear Research Center ML23073A3992023-03-0101 March 2023 University of California Davis Mcclellan Nuclear Research Center (MNRC) License Holder Appointment IR 05000607/20232012023-02-23023 February 2023 University of California - Davis U.S. Nuclear Regulatory Commission Routine Inspection Report 05000607/2023201 ML23045A3202023-02-14014 February 2023 14 Day Notification to Document Control Desk of Event 56331 Made to NRC Operations Center by UC Davis MNRC on February 1st at 1651 Est ML23039A2072023-02-0808 February 2023 University of California Davis Mcclellan Nuclear Research Center (Mnrc), Docket Number 50-607, License Number R-130, License Amendment Request 2023-01 IR 05000607/20222022022-12-28028 December 2022 University of California-Davis - Us Nuclear Regulatory Commission Routine Inspection Report No. 05000607/2022202 ML22214B8292022-11-21021 November 2022 Letter to Ucd with Renewed Facility Operating License ML22213A1692022-10-18018 October 2022 Regents of the University of California - Environmental Assessment and Finding of No Significant Impact Regarding Renewal of Facility Operating License No. R-130 for the University of California - Davis/Mcclellan Nuclear Research Center ML22213A1622022-10-18018 October 2022 FRN Re UCD-MNRC Environment Assessment ML22193A2532022-07-12012 July 2022 Univ. of California-Davis - Summary of the Analysis of Changes Made to the MNRC Emergency Plan Under the Provisions of 10 CFR 50.54q ML22181B0822022-06-30030 June 2022 University of California-Davis/McClellan Nuclear Research Center, Response to NRC Request for Additional Information Letter Dated June 24th, 2022 Regarding License Renewal Application ML22174A2932022-06-28028 June 2022 Regents of the University of California - Report on the Regulatory Audit License Renewal Application for the University of California - Davis/Mcclellan ML22173A2092022-06-24024 June 2022 Regents of the University of California; Request for Additional Information Regarding License Renewal Application for the University of California ML22174A4222022-06-23023 June 2022 Additional Response to NRC Request for Additional Information Letter Dated June 3rd 2022 Regarding License Renewal Application for the University of California-Davis/McClellan Nuclear Research Center ML22173A2022022-06-22022 June 2022 Response to NRC Request for Additional Information Letter Dated June 3rd 2022 Regarding License Renew Al Application for the University of California - Davis/Mcclellan Nuclear Research Center ML22172A1982022-06-21021 June 2022 UC Davis MNRC Submission of Technical Specification in Support of License Renewal Application ML22154A5442022-06-0303 June 2022 Univ. of CA - Davis, MNRC Submittal of Technical Specification in Support of License Renewal Application ML22154A5482022-06-0303 June 2022 University of California - Davis, Submittal of MNRC 2021 Annual Report ML22146A1942022-06-0303 June 2022 Regents of the University of California - RAI Regarding License Renewal Application for the University of California - Davis/Mccellan Nuclear Research Center IR 05000607/20222012022-05-26026 May 2022 University of California-Davis U.S. Nuclear Regulatory Commission Routine Inspection Report No 05000607/2022201 ML22137A2602022-05-26026 May 2022 University of California - Davis - Closure of Confirmatory Action Letter No. NRR 02 002 on the Site-Specific Compensatory Measures Implementation Plan ML23142A3032022-05-22022 May 2022 Univ. of California - Davis, Submittal of MNRC 2022 Annual Report ML22109A1042022-05-0303 May 2022 Regents of the Univ. of CA - Review of the Physical Security Plan in Support of License Renewal Application for the Univ. of CA-Davis/McCellan Nuclear Research Center ML22089A1582022-03-30030 March 2022 UC Davis MNRC Response to NRC Staff Request for Additional Information Regarding Licensing Renewal Application Letter Issued February 8th, 2022 ML22041A3782022-02-28028 February 2022 Regents of the University of California - Determination of Acceptability and Sufficiency for Docketing and Opportunity for Hearing Regarding the License Renewal Application for the University of California - Davis/Mcclellan Nuclear Research ML22038A1402022-02-0808 February 2022 Regents of the University of California - Request for Additional Information Regarding License Renewal Application for the University of California - Davis/Mcclellan Nuclear Research Center ML22026A2862022-02-0202 February 2022 Regents of the University of California - Regulatory Audit Re License Renewal Application for the University of California - Davis/Mcclellan Nuclear Research Center Training, Research, Isotope, General Atomics Nuclear Reactor ML22014A1272022-01-11011 January 2022 50 .54P Submittal of the Ucd/Mnrc Physical Security Plan for University of California, Davis Mcclellan Nuclear Research Center (Ucd/Mnrc), Docket No. 50-607, Facility Operating License No. R-130 the ML21300A3922021-12-23023 December 2021 University of California-Davis U.S. Nuclear Regulatory Commission Routine Inspection Report No. 05000607/2021202 ML21351A3172021-12-17017 December 2021 UC Davis MNRC Response to NRC Staff Request for Additional Information Regarding Licensing Renewal Application Letter Issued November 30th, 2021 IR 05000607/20212022021-12-0606 December 2021 University of California-Davis - Nuclear Regulatory Commission Security Inspection Report No. 05000607/2021202 Cover Letter ML21316A1162021-11-30030 November 2021 Regents of the University of California - Request for Additional Information Regarding License Renewal Application for the University of California-Davis Mccellan Nuclear Research Center ML21252A7572021-10-0505 October 2021 University of California-Davis/MCCLELLAN - Approval of the Revised Nuclear Radiation Center Selection and Training Plan ML21265A5412021-09-22022 September 2021 UC Davis MNRC Cover Letter for Response to Request for Supplemental Information ML21250A3662021-09-14014 September 2021 Regents of the University of California Report on the Regulatory Audit License Renewal Application for the University of California Davis/Mcclellan Nuclear Research Center Triga Nuclear Reactor ML21175A3342021-06-22022 June 2021 Transmittal of University of California, Davis, MNRC 2020 Annual Report IR 05000607/20212012021-05-0707 May 2021 University of California-Davis - U. S. Nuclear Regulatory Commission Routine Inspection Report No. 05000607/2021201 ML21029A1472021-01-25025 January 2021 UC Davis Mcclellan Nuclear Research Center - 50.54P Submittal of the Ucd/Mnrc Physical Security Plan ML20338A2622020-12-10010 December 2020 NRR-106 University of California Davis License Renewal - Regulatory Audit Letter and Plan ML20295A4242020-11-16016 November 2020 Notification of Mailing Address Change Regarding Submittal of Fingerprint Cards ML20261H3882020-09-17017 September 2020 Updated UC Davis MNRC Reactor Proposed License Renewal Ipac Trust Resources Report ML20245E5672020-09-0303 September 2020 University of California, Davis - Review of the Emergency Plan in Support of the Renewal for Facility Operating License No. R 130 IR 05000607/20202022020-08-0303 August 2020 University of California-Davis - U.S. Nuclear Regulatory Commission Routine Inspection Report 05000607/2020202 2024-02-01
[Table view] Category:Response to Request for Additional Information (RAI)
MONTHYEARML22181B0822022-06-30030 June 2022 University of California-Davis/McClellan Nuclear Research Center, Response to NRC Request for Additional Information Letter Dated June 24th, 2022 Regarding License Renewal Application ML22173A2032022-06-21021 June 2022 University of California - Davis, Response to NRC Request for Additional Information Letter Dated June 3rd 2022 Regarding License Renew Al Application - Appendix B, Radiological Impact of Accidents ML22089A1582022-03-30030 March 2022 UC Davis MNRC Response to NRC Staff Request for Additional Information Regarding Licensing Renewal Application Letter Issued February 8th, 2022 ML21351A3172021-12-17017 December 2021 UC Davis MNRC Response to NRC Staff Request for Additional Information Regarding Licensing Renewal Application Letter Issued November 30th, 2021 ML21265A5522021-09-22022 September 2021 Th RA1 Questions ML21265A5412021-09-22022 September 2021 UC Davis MNRC Cover Letter for Response to Request for Supplemental Information ML15348A3862015-10-29029 October 2015 Response to NRC Request for Additional Information Regarding License Amendment Request from the University of California-Davis Mcclellan Nuclear Research Center Per the Letter Dated June 3, 2015 2022-06-30
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Text
UNIVE RSITY OF CALIFORNIA, DAVIS BERKELEY
- SAN FRANCISCO {\ ;\ __________
SANTA BARBARA
- SANTA CRUZ McClellan Nuclear Research Center UNIVERSITY OF CALIFORNIA Davis (9]6)-614-6200 December 17th, 2021 US Nuclear Regulatory Commission 11555 Rockville Pike MS 12-D3 Ro.ckville, MD 20852-2738
SUBJECT:
UC Davis MNRC Response to NRC Staff Request for Additional Informa tion Regarding Licensing Renewal Application Letter Issued Novemb er 301\ 2021.
Enclosed are the UC Davis MNRC responses to the 3 requests for additional information issued by the NRC staff on November 30th 2021.
I have reviewed this submission and found it to be truthful and accurate. If there are any questions or concerns, please contact me directly.
I declare under penalty of perjury that the foregoing is true and correct executed on Decemb er 17th , 2021 .
Sincerely,
[ti¥ 0-"v Wesley Ft'fy PhD Facility Director
NRC Request for Additional Information Item #1}
The regulation, 10 CFR 50.9 requires information to be complete and accurate in all material aspects. The guidance in NUREG-1537, Part 1, Section 1.4, "Shared Facilities and Equipment, 11 states, in part, that the application should describe systems and equipmen t that are shared with facilities not covered by the SAR.
Further, NUREG-1537 states that any safety implications that result from sharing facilities or systems should be evaluated in and referenced to the appropriate chapter of the SAR.
The NRC staff review of the licensee's SAR, Section 1.4.3, "Shared utilities, 11 could not ascertain if any of the utilities (electric, natural gas, water, phone, internet, etc.) used to support the operation of the reactor facility were shared with other facilities not described in the SAR, and/or if any safety implications could result from any shared utilities.
Describe whether any utilities are shared with other facilities not covered by the SAR, and if any safety implications could result from the loss of any shared utilities, or justify why no additional information is needed.
UCD/MNR C Response: All utilities provided to the MNRC are done by external providers.
In contrast to many other research reactors the MNRC reactor is located in a standalone building. The only shared utility is electrical service that is shared with the building directly south of the MNRC which is owned by the McClellan Business Park. While offsite utilities are required to operate the facility, none are required to place the reactor in a safe and secure condition. The loss of offsite utilities cannot generate any accident scenario .
The two utilities of most interest to all reactors are electricity and water. In the event of loss of electrical power, the facility maintains a backup battery supply which provides power to the console, reactor magnets, and all reactor indication for 15 minutes. This gives the reactor operator ample time to shut the reactor down in a controlled manner and verity the reactor has been placed in a secure condition. No electrical service (onsite or offsite) is required to maintain this secure condition.
Offsite water service is not directly required to operate the reactor or during a LOCA. This is due to the very small loss of primary water from evaporation during 1 MW operations. Typically, it would take approximately 2 weeks to reduce the level of water in the reactor tank to below what is required by the technical specifications. In chapter 13 of the SAR the analysis shows that the reactor does not need additional water (presumably from an offsite source) to prevent unacceptable heating of the core during a complete LOCA event.
Loss of offsite water can occur and does indirectly effect reactor operations as offsite water provides the water for the evaporative cooling system (secondary system) that cools the primary cooling system of the reactor. In the event of the loss of offsite water to feed the secondary system, the reactor operator would have several hours to ascertaining the situation and place the reactor in a secure configuration.
In this scenario, before the primary coolant exceeded the technical specification limit, the reactor operator would receive numerous warnings and alarms (e.g. cooling tower low float, secondary low flow alarm, and primary tank temperatu re warning) over the course of several hours, which would provide ample time to shut the reactor down.
NRC Request for Additional Information Item #2)
The regulation, 10 CFR 50.9 requires information to be complete and accurate in all material aspects. The guidance in NUREG-1537, Part 1, Section 1.8, "Facility Modifications and History," states, in part, that the SAR should indicate if the facility has not undergone significant or safety-relat ed physical or operational modifications since it was initially licensed, or since the last renewal was issued and should reflect any significant modifications made to the non-power reactor.
The NRC staff review of the licensee's SAR, Section 3.1.3, "Protection by Multiple Fission-Product Barriers (Criteria 10-19}," "Criterion 13: Instrumentation and Control," finds that the licensee states that "Note that square wave and pulse mode are no longer utilized at MNRC. 11 However, facility modifications needed to be implemente d to prevent an inadvertent square wave or pulse operation were not able to be identified in the SAR by the NRC staff Provide the following information to support the NRC staff review:
- a. Provide a description of the facility modifications planned or implemente d to prevent an inadvertent square or pulse operation of the MNCR.
- b. Provide an assessment of the potential for an inadvertent square wave or pulse event, including any changes or updates needed to the descriptions of any accident scenarios provided in the LRA SAR, Chapter 13, "Accident Analysis. 11
- c. Provide any changes to the proposed technical specifications, if applicable to the proposed facility modifications.
UCD/MNRC Response: The compressed gas (nitrogen) supply has been disconnected and locked out at the base of the transient rod drive. The compressed gas cyl inder itself has been disconnected and removed from the facility. These modifications make rapid ejection of the transient rod physically impossible.
Therefore, pulses and square waves cannot be physically achieved by any means.
The square wave and pulse mode buttons on the console have been disable so.that they cannot be physically depressed. Prior to this when either of these buttons was depressed a circuit was completed so that if the reactor was below lkW, the NM-1000 would be disabled and the NPP-1000 would be readied for the reactor to perform a pulse or square wave. If the reactor was above 1 kW, the 1 kW interlock would prevent the bypass of the NM-1000 and would generate a warning to the reactor operator that the reactor cannot enter into pulse or square wave mode.
By physically preventing the pulse and square wave buttons from engaging the reacto r cannot inadve rtently be placed in a mode where the NM-1000 is bypassed. Therefore, the 1 kW interlock surveillance will no longer be required. Current and future ope rators will be trained on the specifics of these modificatio n. All other references to pulse or square wave model will be removed from the technical specifications.
NRC Request for Additional Information Item #3)
The regulation, 10 CFR 50.9 requires information to be complete and accurate in all material aspects. The guidance in NUREG-1537, Part 1, Section 4.2.2, "Control Rods, states, in part, that the applicant should 11 discuss the design, composition, and reactivity effects of control rod followers . Section 4.1, "Introduction, 11 and Section 4.2.3.1, "Control Function, of the SAR indicate that fuel-follower sections consist of 20 or 30 11
weigh t percen t uranium. However, Section 7.3.1, "Control Rods, 11 of the SAR states that the weigh t percen t of uranium in the fuel is 20.
Section 4.6.4.3, "Operating Core Configuration (OCC), of the 11 SAR indicates that the operating core configuration {OCC) only contains fuel-followers with 20 weigh t percen t uranium. Changes made to the OCC to develop the limiting core configuration (LCC} are described in Section 4.6.4.4, "Future Cores and the Limiting Core Configuration (LCC}, of the SAR, but changes to 11 the composition of control rod followers are not specified. Analysis of the OCC and LCC provides the basis for hot-channel power used in steady -state therm al hydraulic analysis of the MNRC core, as well as contro l rod worth values and power peaking factors used in the accident analyses. The 30/20 fuel-followers contai n more uranium by weigh t than 20/20 fuel-followers and are expec ted to have a higher reactivity worth.
If control rod followers are loaded in the core that differ from those model ed in the SAR, then control rod worth in the core may excee d that used in the accident analysis, and power density and peaking factors achiev ed in the LCC may not be limiting. The NRC staff reque sts the licensee to:
- a. Clarify what control rod followers are model ed in analysis of the OCC and LCC described in the SAR.
- b. Describe the allowable loading of control rod followers in the core.
- c. If the allowable loading differs from that model ed in analys is of the OCC and LCC, please provide additional basis to confirm that design and accident analysis remains applic able.
MNRC /UCD Response: In both the OCC and LCC only 20/20 fuel follow ed controls were analyzed for in terms of therm al outpu t and peaking factors. A 30/20 fuel follow ed contro l rod would undoubtable have a notab ly higher reactivity worth , which would result in a larger therm al outpu t and overall eleme nt peaking factor. Based on operational and modeling experience with standard 30/20 fuel elements along with the position of the fuel followed control rods, it is unlikely a 30/20 fuel follow ed control rod would produce a peaking factor beyond what is already analyzed for in chapte r 4 of the SAR. However, this configuration has not been specifically analyzed for.
At this time the MNRC is willing to comm it to a technical specification that restricts the use of fuel follow ed control rod to only the 20/20 type. If the M NRC wishes to utilize a differe nt type of fuel follow ed control rod in the future , a license amen dmen t will be submi tted to the NRC for approval. MNRC has no intensions of reducing the total numb er of control rods in the core or their location.