Letter Sequence Acceptance Review |
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CAC:00120, (Open) EPID:L-2021-LLA-0039, Independent Spent Fuel Storage Installation - Request for a Temporary Exemption from 10 CFR 73, Appendix B, Section Le and 10 CFR 73.55(r) Annual Physical Requalification Requirement (Approved, Closed) |
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MONTHYEARML21068A3612021-03-0909 March 2021 International, Submittal of HI-STORM 100 Multipurpose Canister Storage System Amendment 16 Request Project stage: Request ML21179A1792021-07-12012 July 2021 Acceptance Review of Request for Amendment No. 16 to Certificate of Compliance No. 1014 for HI-STORM 100 Multipurpose Canister Storage System, Request for Supplemental Information Project stage: Acceptance Review ML21201A0282021-07-23023 July 2021 Handout for Meeting with Holtec on HI-STORM 100 Amendment No. 16 (July 27, 2021) Project stage: Request ML21237A0422021-07-23023 July 2021, 25 August 2021 Summary of July 27, 2021, Public Meeting on HI-STORM 100, Amendment No. 16, Graded Approach Project stage: Request ML21223A0562021-08-10010 August 2021 Attachment 10: Affidavit in Accordance with 10 CFR 2.390 Project stage: Other ML21223A0452021-08-10010 August 2021, 11 August 2021 HI-STORM 100 Amendment 16 Responses to Requests for Supplemental Information Project stage: Request ML21223A0502021-08-11011 August 2021 Attachment 4: HI-STORM 100 FSAR Proposed Revision 21A, Changed Pages (non-proprietary) Project stage: Other ML21223A0462021-08-11011 August 2021 HI-STORM 100 Amendment 16 Responses to Requests for Supplemental Information Project stage: Supplement ML21223A0482021-08-11011 August 2021 Attachment 2: HI-STORM 100 Amendment 16 Rsi Responses (non-proprietary) Project stage: Other ML21223A0492021-08-11011 August 2021 Attachment 3: HI-STORM 100 Amendment 16 Certificate of Compliance Appendix D, Changed Pages (non-proprietary) Project stage: Other ML21237A0432021-08-25025 August 2021 Summary of July 27, 2021, Public Meeting with Holtec International to Discuss Certificate of Compliance No. 1014 for the HI-STORM 100, Amendment No. 16, Graded Approach Project stage: Meeting ML22028A3712022-01-28028 January 2022 International, HI-STORM 100 Amendment 16 Additional Information on Graded Approach Project stage: Request ML22028A3722022-01-28028 January 2022 International, HI-STORM 100 Amendment 16 Additional Information on Graded Approach Project stage: Other ML22048C2222022-02-17017 February 2022 International - HI-STORM 100 Multipurpose Canister Storage System Amendment 19 Project stage: Request ML22053A1302022-03-17017 March 2022 Acceptance Review Request for Amendment No. 16 to Certificate of Compliance No. 1014 for the HI-STORM 100 Multipurpose Canister Storage System (Docket No. 72-1014, CAC No. 001028, EPID: L-2021-LLA-0039) Project stage: Acceptance Review ML22167A1202022-07-0101 July 2022 Amendment No. 16 to Certificate of Compliance No. 1014 for the HI-STORM 100 Multipurpose Canister Storage System - Request for Additional Information First Batch Project stage: RAI ML22196A0862022-07-15015 July 2022 International, Schedule for Responses to HI-STORM 100 Amendment 16 Requests for Additional Information Batch 1 Project stage: Other ML22243A2702022-08-31031 August 2022 HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batches 1 and 2) Project stage: Response to RAI ML22243A2782022-08-31031 August 2022 Attachment 8: Affidavit in Accordance with 10 CFR 2.390 Project stage: Other ML22243A2692022-08-31031 August 2022 HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batches 1 and 2) Project stage: Request ML22243A2742022-08-31031 August 2022 Attachment 4: HI-STORM 100 FSAR Proposed Revision 21B, Changed Pages (non-proprietary) Project stage: Other ML22243A2722022-08-31031 August 2022 Attachment 2: Holtec Response to Request for Additional Information (Batch 1 and Partial Batch 2) Project stage: Response to RAI ML22249A3472022-09-0606 September 2022, 9 September 2022 International, HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 2) Project stage: Request ML22249A3482022-09-0909 September 2022 International, HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 2) Project stage: Response to RAI ML22276A2862022-10-0303 October 2022 HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 3) Project stage: Request ML22276A2872022-10-0303 October 2022 HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 3) Project stage: Response to RAI ML22325A3382022-11-21021 November 2022 Schedule for Responses to HI-STORM 100 Amendment 16 Requests for Additional Information Batch 4 Project stage: Other ML22335A4562022-12-13013 December 2022 Letter - Amendment 16 to Certificate of Compliance No. 1014 for Hi-Storm 100 Multipurpose Canister Storage System - Request for Additional Information Batch 5 Project stage: RAI ML22335A4552022-12-13013 December 2022 Amendment 16 to Certificate of Compliance 1014 for Hi-Storm 100 RAI Batch 5 Project stage: Request ML22335A4572022-12-13013 December 2022 Enclosure 1- Amendment 16 to Certificate of Compliance No. 1014 for Hi-Storm 100 Multipurpose Canister Storage System Request for Additional Information Batch 5 Project stage: RAI ML23005A0002023-01-0404 January 2023 International HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 4) Project stage: Request ML23005A0022023-01-0404 January 2023 Attachment 6 - Affidavit of Kimberly Manzione Project stage: Other ML23005A0042023-01-0404 January 2023 Attachment 2 - HI-STORM 100 Amendment 16 Response to Request for Additional Information (Batch 4) Project stage: Response to RAI ML23005A0062023-01-0404 January 2023 Attachment 4 - HI-STORM 100 FSAR Proposed Text Changes, Changed Pages Project stage: Other ML23005A0012023-01-0404 January 2023 International HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 4) Project stage: Response to RAI ML23005A2752023-01-0404 January 2023 Attachment 2 - Affidavit of Kimberly Manzione Project stage: Other ML23005A2732023-01-0505 January 2023 International HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 4) Additional Supporting Document Project stage: Response to RAI ML23013A3412023-01-13013 January 2023 Attachment 3 - HI-STORM 100 Amendment 16 Certificate of Compliance Appendix a, Changed Pages (Non-Proprietary) Project stage: Other ML23013A3402023-01-13013 January 2023 Attachment 2 - HI-STORM 100 Amendment 16 RAI Responses Batch 5 (Non-Proprietary) Project stage: Other ML23013A3382023-01-13013 January 2023 International HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 5) Project stage: Response to RAI ML23013A3432023-01-13013 January 2023 Attachment 5 - HI-STORM 100 Amendment 16 Certificate of Compliance Appendix C, Changed Pages (Non-Proprietary) Project stage: Other ML23013A3442023-01-13013 January 2023 Attachment 6 - HI-STORM 100 Amendment 16 Certificate of Compliance Appendix D, Changed Pages (Non-Proprietary) Project stage: Other ML23013A3452023-01-13013 January 2023 Attachment 7 - HI-STORM 100 Amendment 16 Certificate of Compliance Appendix A-100U, Changed Pages (Non-Proprietary) Project stage: Other ML23013A3462023-01-13013 January 2023 Attachment 8 - HI-STORM 100 FSAR Proposed Revision 21E, Changed Pages (Non-Proprietary) Project stage: Other ML23013A3372023-01-13013 January 2023 International HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 5) Project stage: Request ML23013A3472023-01-13013 January 2023 Attachment 9 - Affidavit of Kimberly Manzione Project stage: Other ML23013A3422023-01-13013 January 2023 Attachment 4 - HI-STORM 100 Amendment 16 Certificate of Compliance Appendix B, Changed Pages (Non-Proprietary) Project stage: Other ML23076A2752023-03-17017 March 2023 Attachment 3: HI-STORM 100 FSAR Proposed Text Changes, Changed Pages Project stage: Other ML23076A2782023-03-17017 March 2023 Attachment 5: Affidavit Project stage: Other ML23076A2722023-03-17017 March 2023 HI-STORM 100 Amendment 16 RAI 3-3 Clarification Project stage: Other 2022-02-17
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Category:Letter
MONTHYEARML24016A1902024-01-30030 January 2024 International, Inc. - Notice of Violation; the U.S. Nuclear Regulatory Commission Inspection Report 07201014/2022201 ML24018A1992024-01-18018 January 2024 International, Administrative Change to HI-2200343-A ML23363A0312024-01-0404 January 2024 Application for HI-STORM 100 Cask System, Amendment No. 19 - Acknowledgement of Withdrawal and Notification of the U.S. Nuclear Regulatory Commission Staff Efforts Closure ML23355A0842023-12-21021 December 2023 International, Withdrawal of HI-STORM I00 Multipurpose Canister Storage System Amendment ML23324A0952023-12-0606 December 2023 Amendment No. 19 to Certificate of Compliance No. 1014 for the HI-STORM 100 Multi-purpose Canister Storage System - Request for Additional Information ML23328A0052023-12-0505 December 2023 Issuance of Renewed Certificate of Compliance No. 1014, Amendment No. 17 for the Hi-Storm 100 Cask System (Cac/Epid 001028/L-2021-LLA-0140) ML23338A3052023-12-0404 December 2023 International, Submittal of Supplement to RAI Responses on HI-STORM 100 Amendment 18 ML23334A1912023-11-30030 November 2023 International, Submittal of Topical Report HI-2210161-A Version ML23321A2172023-11-17017 November 2023 International, Responses to NRC Questions Form EA-23-044 Pre-Decisional Enforcement Conference JAFP-23-0063, Registration of Spent Fuel Cask Use2023-11-13013 November 2023 Registration of Spent Fuel Cask Use ML23310A0362023-11-0909 November 2023 International, Inc. - U.S. Nuclear Regulatory Commission Inspection Report 07201014/2023201 ML23283A1262023-11-0202 November 2023 Letter - Second Request for Additional Information - HI-STORM 100 Amd 18 ML23289A1582023-10-16016 October 2023 Decommissioning International - Registration of Spent Fuel Casks and Notification of Permanent Removal of All Indian Point Unit 3 Spent Fuel Assemblies from the Spent Fuel Pit ML23270A0082023-09-27027 September 2023 Registration of Spent Fuel Casks ML23263B1232023-09-20020 September 2023 HI-STORM 100 Amendment 16 Responses to Second Round Requests for Additional Information ML23234A1572023-09-14014 September 2023 Letter to Holtec International Final Safety Evaluation for Hi-2210161, Revision No. 4, Topical Report on the Radiological Fuel Qualification Methodology for Dry Storage Systems ML23145A1752023-09-12012 September 2023 NRC Choice Letter to Holtec International with Attached Safety Inspection Report, IR 72-1014/2022-201, December 12-15, 2022, Inspection of Holtec International in Camden, New Jersey (Docket Nos.: 72-1014, 72-1032) ML23251A2512023-09-0808 September 2023 International, Submittal of Supplement to RAI Responses on HI-STORM 100 Amendment 18 ML23250A0812023-09-0707 September 2023 Registration of Spent Fuel Casks ML23230B1582023-08-28028 August 2023 Amendment 16 to Certificate of Compliance 1014 for HI-STORM 100 Multipurpose Canister Storage System Request for Additional Information Second Round NL-23-0620, ISFSI, and Edwin I. Hatch Nuclear Plant ISFSI, Registration of Spent Fuel Cask Use2023-08-0303 August 2023 ISFSI, and Edwin I. Hatch Nuclear Plant ISFSI, Registration of Spent Fuel Cask Use ML23135A7582023-07-20020 July 2023 Letter to Holtec - Draft SE for HI-2210161, Revision No. 4, Topical Report ML23200A0422023-07-19019 July 2023 Registration of Spent Fuel Casks ML23195A0382023-07-14014 July 2023 U.S. Nuclear Regulatory Commission Inspection Report No. 72-1014/2023-201 NL-23-0566, ISFSI and Edwin I. Hatch Nuclear Plant ISFSI - Registration of Spent Fuel Cask Use2023-07-13013 July 2023 ISFSI and Edwin I. Hatch Nuclear Plant ISFSI - Registration of Spent Fuel Cask Use ML23068A3852023-06-29029 June 2023 1. Transmittal Letter, Renewal of CoC No. 1014, HI-STORM 100 Cask System ML23163A1402023-06-23023 June 2023 Acceptance Review of Request for Amendment No. 19 to Certificate of Compliance No. 1014 for the HI-STORM 100 Multipurpose Canister Storage System SVPLTR 23-0021, Registration of Use of Casks to Store Spent Fuel2023-06-20020 June 2023 Registration of Use of Casks to Store Spent Fuel ML23167A0352023-06-16016 June 2023 Registration of Use of Cask to Store Spent Fuel NL-23-0457, ISFSI, and Edwin I. Hatch Nuclear Plant, ISFSI - Registration of Spent Fuel Cask Use2023-06-12012 June 2023 ISFSI, and Edwin I. Hatch Nuclear Plant, ISFSI - Registration of Spent Fuel Cask Use ML23146A1392023-05-26026 May 2023 International - Submittal of RAI Responses on HI-STORM 100 Amendment 18 SVP-23-016, Independent Spent Fuel Storage Installation Annual Radioactive Effluent Release Report2023-04-20020 April 2023 Independent Spent Fuel Storage Installation Annual Radioactive Effluent Release Report ML23104A3782023-04-14014 April 2023 International, Submittal of Revision 4 of the Topical Report on Methodology for Fuel Qualification ML23076A2722023-03-17017 March 2023 HI-STORM 100 Amendment 16 RAI 3-3 Clarification ML23069A2292023-03-10010 March 2023 HI-STORM 100 Multipurpose Canister Storage System Amendment 19 Rsi Responses ML23058A1282023-03-0606 March 2023 CoC No.1014 Amendment 18 - RAI Letter (Public) ML22279B0282023-02-16016 February 2023 Congressional Letters-Direct Final Rule: List of Approved Spent Fuel Storage Casks: Holtec International Hi-Storm 100 Cask System, Certificate of Compliance No. 1014 ML23046A1022023-02-15015 February 2023 Registration of Spent Fuel Casks and Notification of Permanent Removal of All Indian Point Unit 2 Spent Fuel Assemblies from the Spent Fuel Pit ML23024A2662023-02-10010 February 2023 Acceptance Review of Request for Amendment No. 19 to Certificate of Compliance No. 1014 for the HI-STORM 100 Multipurpose Canister Storage System- Request for Supplemental Info ML23032A4502023-02-0101 February 2023 International - Submittal of Supplemental Information to RAI Responses on the Topical Report on Methodology for Fuel Qualification ML23018A2242023-01-18018 January 2023 Registration of Spent Fuel Cask Use ML23013A3382023-01-13013 January 2023 International HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 5) ML23005A2732023-01-0505 January 2023 International HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 4) Additional Supporting Document ML23005A0012023-01-0404 January 2023 International HI-STORM 100 Amendment 16 Responses to Requests for Additional Information (Batch 4) ML22355A1022022-12-21021 December 2022 Registration of Unit 2 Spent Fuel Cask Use ML22335A4562022-12-13013 December 2022 Letter - Amendment 16 to Certificate of Compliance No. 1014 for Hi-Storm 100 Multipurpose Canister Storage System - Request for Additional Information Batch 5 ML22325A3382022-11-21021 November 2022 Schedule for Responses to HI-STORM 100 Amendment 16 Requests for Additional Information Batch 4 ML22321A2772022-11-17017 November 2022 Renewed Facility License No. DPR-26 CP-202200450, (CPNPP) - Registration of Dry Spent Fuel Storage Canisters2022-11-16016 November 2022 (CPNPP) - Registration of Dry Spent Fuel Storage Canisters ML22217A0162022-11-0707 November 2022 Request for Exemption Related to Allowable Contents for the Certificate of Compliance No. 1014, HI-Storm 100S Version E Cask - Issuance of Exemption 2024-01-04
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July 12, 2021 Brian Seawright Licensing Engineer Holtec International Holtec Technology Campus 1 Holtec Blvd.
Camden, NJ 08104
SUBJECT:
ACCEPTANCE REVIEW OF REQUEST FOR AMENDMENT NO. 16 TO CERTIFICATE OF COMPLIANCE NO. 1014 FOR THE HI-STORM 100 MULTIPURPOSE CANISTER STORAGE SYSTEM (DOCKET NO. 72-1014, CAC NO. 001028, EPID: L-2021-LLA-0039) - REQUEST FOR SUPPLEMENTAL INFORMATION
Dear Mr. Seawright:
By letter dated March 9, 2021 [Agencywide Documents Access and Management System (ADAMS) Accession No. ML21068A360], Holtec International (Holtec) submitted to the U.S.
Nuclear Regulatory Commission a request to amend the Certificate of Compliance No. 1014 for HI-STORM 100 Multipurpose Canister Storage System.
The staff has performed an acceptance review of your application to determine if the application contains sufficient technical information to begin a detailed technical review. The staff has determined that the application does not provide sufficient technical information to begin a detailed review and that supplemental information is needed. The information needed to continue our review is described in the request for supplemental information (RSI) in the enclosures to this letter.
In Amendment No. 16, you also proposed to reorganize the certificate of compliance using the process developed and described in RIRP-I-16-01 (ADAMS Accession No. ML17138A119), also referred to as the graded approach. The staff has additional questions regarding this proposed change and plans to discuss this matter in a public meeting.
In order to schedule our technical review, responses to the enclosed RSI should be provided within 30 days from the date of this letter. If Holtec is unable to meet this response date, please notify us, at least one week prior to the due date, of your new submittal date and the reasons for the delay. If Holtec is not able to respond within this timeframe or the RSI responses do not provide sufficient information, the application may not be accepted for review.
B. Seawright Please reference Docket No. 72-1014, CAC No. 001028, and EPID No. L-2021-LLA-0039 in future correspondence related to this licensing action. If you have any questions, please contact me at 301-415-1018.
Sincerely, Signed by Chen, Yen-Ju on 07/12/21 Yen-Ju Chen, Sr. Project Manager Storage & Transportation Licensing Branch Division of Spent Fuel Management Office of Nuclear Material Safety and Safeguards Docket No.: 72-1014 CAC No.: 001208 EPID: L-2021-LLA-0039
Enclosures:
- 1. RSI
- 2. RSI (Proprietary)
Request for Supplemental Information Docket No. 72-1014 Holtec International HI-STORM 100 Multipurpose Canister Storage System Certificate of Compliance No. 1014 Amendment No. 16 Thermal RSI 5-1 See Enclosure 2.
Confinement RSI 9-1 Demonstrate the Proposed Changes #3 and #6 will reasonably maintain confinement of radioactive material under normal, off-normal, and credible accident conditions.
In its Statement of Proposed Changes, the applicant proposed to modify vent and drain penetrations to include the option of second port cover plate (Proposed Change #3).
The applicant also stated that the addition of a second cover plate for these penetrations removes the need to do field helium leak testing of these cover plates (Proposed Change #6).
The weld on the port cover plate cannot be executed under conditions where the root pass might have been subjected to pressurization from the helium filled in the canister itself. When executing vent and drain connection cover plate welds, one should not assume that the fill and drain closure valves quick-disconnects, or similar, are leak tight without performing helium leak testing. It is assumed that mechanical closure devices (e.g., a valve or quick-disconnect) permit helium leaks. Field experience has shown that such leaks occur and have been responsible for causing leak paths through the weld.
Consequently, welds potentially subjected to helium pressure (by way of leakage through a mechanical closure device) during the welding process must be subsequently helium leakage tested in accordance with the method in ANSI N14.5. In addition, ANSI N14.5 does not allow for the elimination of leakage rate testing based on the use of multiple barriers.
This information is required to satisfy 10 CFR 72.236 (d), 72.236 (j), and 72.236 (l).
Observations O-1 The staff recognizes that the HI-STORM 100 Amendment No. 15 (effective on June 14, 2021) and the ongoing renewal may result in additional changes to the Certificate of Compliance (CoC) and safety analysis report (SAR) which may impact Amendment No.
- 16. All application materials for Amendment No. 16 should be updated accordingly to facilitate staffs review.
Enclosure 1
O-2 Provide description of Note 3 shown on Table 2.4-5a of the proposed CoC Appendix D.
The applicant marked Note 3 to the title of Table 2.4-5a, but without providing any description. The applicant should either remove Note 3 from Table 2.4-5a or provide description on Note 3.
The staff needs this information to determine compliance with 10 CFR 72.236(f).
O-3 Provide cask component temperatures for MPC-32M and MPC-68M with heat load pattern No. 3 to ensure that the uniform heat load pattern is the most bounding pattern for both MPC-32M and MPC-68M.
In Report HI-2210138, Revision 0, the applicant shows in Tables 7-1 and 7-2, the uniform heat load patterns for MPC-32M and MPC-68M, respectively, resulted in highest peak cladding temperatures (PCTs) and cavity temperatures; therefore, the applicant concludes the uniform heat load pattern for the respective MPCs is the most bounding pattern.
Staff reviewed Tables 7-1 and 7-2 and found that the PCT of uniform heat load pattern is higher than the PCT of pattern No. 3 by 2°C for MPC-32M and by 1°C for MPC-68M.
With such small PCT differences between uniform heat load pattern and pattern No. 3, the applicant should provide cask component temperatures, similar to Table 7-3, of the heat load patterns No. 3 for MPC-32M and MPC-68M. The staff needs the information to verify and ensure that the uniform heat load pattern is indeed the bounding heat load pattern for MPC-32M and MPC-68M.
The staff needs this information to determine compliance with 10 CFR 72.236(f).
O-4 See Enclosure 2.
O-5 (A) Provide the derivations of the MPC-32M and MPC-68M annulus pressures, as shown in Report HI-2210138, Revision 0, Tables 7-8 and 7-9; and (B) explain the similarity of annulus pressures between MPC-32M and MPC-68M under long-term normal storage, extreme ambient accident, burial under debris accident, and fire accident.
(A) The applicant presented in Report HI-2210138, Revision 0, Tables 7-8 and 7-9, the annulus pressures of MPC-32M and MPC-68M, respectively, for MPC loaded in the unventilated overpack with the bounding heat load pattern in cask array under long-term normal storage, extreme ambient accident, burial under debris accident, and fire accident.
Provide the derivations of these MPC-32M and MPC-68M annulus pressures under the conditions underlined above. The derivation of annulus pressures should include the assumptions, equations (e.g., ideal gas equation), annulus temperature, and parameters (with units) used in the derivation.
(B) Report HI-2210138, Revision 0, Tables 7-3 and 7-4 present the single cask containing MPC maximum component temperatures with uniform heat load for MPC-32M and MPC-68M, respectively. The cask component temperatures for MPC-32M and MPC-68M are different, and it is expected that the difference, when stored in unventilated overpack, would have impact on the temperature and pressure of the annulus between MPCs and unventilated overpack for normal, off-normal, and accident conditions of storage.
Explain why the MPC-32M annulus pressure (Table 7-8) is identical to the MPC-68M annulus pressure (Table 7-9) under each condition of long-term normal storage, extreme ambient accident, burial under debris accident, and fire accident.
The staff needs this information to determine compliance with 10 CFR 72.236(f).
O-6 Clarify the applicability of Proposed Change #5 to MPC types in the application (see item (A) below) and add a requirement (see item (B) below) in the Technical Specifications or SAR Chapter 9 to ensure the minimum heat load limit is adequate to maintain the water in the HI-TRAC water jacket is above the freezing point (0°C/32°F).
The applicant proposed to use water without glycol in the HI-TRAC water jacket during transfer operations below 32°F ambient (Proposed Change #5). In Report HI-2043317, HI-TRAC Thermal Modeling to Address NRC Review Comments for HI-STORM 100 LAR-9, Appendix N.5.19, the applicant stated that the temperature of water in the HI-TRAC water jacket remains above freezing point (32°F) with heat load equal to or above 10 kW, and therefore, the system of MPC-32 in HI-TRAC does not need to be filled with ethylene glycol under allowable operating short-term conditions. The applicant presented the minimum water temperature in Table N.5.23 and stated that this calculation may be performed using the above set of assumptions for any MPC type and for any site-specific ambient conditions.
(A) Clarify whether the proposed change #5 is applicable only to MPC-32 system (including MPC-32M) with heat load equal to or greater than 10 kW or also applicable to MPC-68 system (including MPC-68M) with heat load equal to or greater than 10 kW.
(B) Add a requirement in Technical Specifications or SAR Chapter 9, Operating Procedures, such as the users need to perform thermal evaluation using the site-specific heat loads and ambient conditions to determine the minimum heat load limit for using water without ethylene glycol in the HI-TRAC water jacket during transfer operations below 32°F. This is to ensure the heat load limit is adequate to maintain the water in the HI-TRAC water jacket above the freezing point (0°C/32°F).
(C) Correct the labeling for N.5.19 on page N-25.
The staff needs this information to determine compliance with 10 CFR 72.236(f).
O-7 See Enclosure 2.
ML21179A178; Ltr ML21179A179 OFFICE NMSS/DFM/STLB NMSS/DFM/STLB NMSS/DFM/STLB NMSS/DFM/IOB WWheatley NAME YChen YC YChen YC HLindsay HL SFigueroa for SF DATE Jun 28, 2021 Jun 28, 2021 Jun 28, 2021 Jun 28, 2021 NMSS/DFM OFFICE NMSS/DFM/NARAB NMSS/DFM/MSB NMSS/DUWP/RDB
/CTCFB JMarcano NAME MCall MC FChang FC ZCruz-Perez ZC ZLi for ZL DATE Jun 29, 2021 Jun 28, 2021 Jun 29, 2021 Jun 29, 2021 OFFICE NMSS/DFM/STLB NMSS/DFM/STLB NAME JMcKirgan JM YChen YC DATE Jul 12, 2021 Jul 12, 2021