ULNRC-05927, Withdrawal of Application for Amendment to Facility Operating License NPF-30 for Revising Technical Specification (TS) 3.6.6, Containment Spray and Cooling Systems, LDCN 09-0025
| ML12305A202 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 10/26/2012 |
| From: | Maglio S Ameren Missouri, Union Electric Co |
| To: | Office of Nuclear Reactor Regulation, Document Control Desk |
| References | |
| TAC ME6645, ULNRC-05927 | |
| Download: ML12305A202 (4) | |
Text
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VI'Ameren MISSOURI October 26, 20 12 ULNRC-05927 U.S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001 Ladies and Gentlemen:
10 CFR 50.90 DOCKET NUMBER 50-483 CALLA WAY PLANT UNIT 1 UNION ELECTRIC CO.
WITHDRAWAL OF APPLICATION FOR AMENDMENT TO FACILITY OPERATING LICENSE NPF-30 Callaway Plant FOR REVISING TECHNICAL SPECIFICATION (TS) 3.6.6, "CONTAINMENT SPRAY AND COOLING SYSTEMS," LDCN 09-0025 ITAC NO. ME6645)
References:
- 1. Ameren Missouri letter ULNRC-05804, "License Amendment Request:
Proposed Revision to Technical Specification 3.6.6, 'Containment Spray and Cooling Systems,' (LDCN 09-0025)," dated June 30, 2011
- 2. Ameren Missouri letter ULNRC-05904, "Response to Request for Additional Information Pertaining to Revision of Technical Specification (TS) 3.6.6, 'Containment Spray and Cooling Systems,' LDCN 09-0025 (TAC No. ME6645)," dated September 10,2012 By letter dated June 30, 2011 (Reference 1), Ameren Missouri (Union Electric Company) submitted an application for amendment to Facility Operating License No. NPF-30 for the Callaway Plant. The results of NRC's acceptance review of the application were transmitted by electronic letter received via e-mail on August 3, 2011. Additional information pertaining to the amendment request was submitted by letter dated September 10, 2012 (Reference 2).
The purpose of the proposed amendment was to revise TS Surveillance Requirement (SR) 3.6.6.3 for verifying the minimum required containment cooling train cooling water flow rate. Rather than requiring verification that each containment cooling train has a cooling water flow rate greater than or equal to 2200 gallons per minute (gpm), revised TS SR 3.6.6.3 would have required verification that the flow rate is "within limits."
PO Box 620 Fulton, MD 65251 AmerenMissouri.com
ULNRC-05927 October 26, 2012 Page2 The proposed change was based on recognizing that the required containment cooling train flow rate (in gpm) is based on the capability to achieve a minimwn required containment heat removal rate (in Btulhr) asswned in the accident analysis. Whereas the latter is an accident analysis asswnption not likely to be changed, the former may be subject to change based on changing system conditions/parameters (such as tube plugging and tube fouling). In addition, the cooling water flow to the containment coolers (air-to-water heat exchangers) is just one of many load flows accounted for in the overall flow balance required to be achieved for the essential service water (ESW) system and the various loads it serves. Such load flows are adjustable, depending where flow margin is needed or available. If approved, the amendment request would have eliminated the actual flow value specified in SR 3.6.6 such that the SR would have required the containment cooling train flow limit to be "within limits." The limit, as proposed, would still have been defmed in the Bases forTS 3.6.6 in terms of the heat removal rate asswned in the accident analysis (and would still would have been subject to the provisions of 10 CFR 50.59 for any changes made to the value).
Notwithstanding the intended license amendment, Ameren Missouri is withdrawing its application for amendment. This action is based on discussions with the NRC staff during their review of the application.
A copy ofthis withdrawal letter is also being provided to the designated Missouri State official. This letter contains no new commitments. If you have any questions on this correspondence, please contact me at (573) 676-8719 or Mr. Tom Elwood at (314) 225-1905.
I declare under penalty of perjury that the foregoing is true and correct.
Sincerely, Executed on: _I 0_/ "L_lLJ_f_l_o_\\ '1--=-----
l)o-,~0 Scott Maglio Regulatory Affairs Manager TBE/nls
ULNRC-05927 October 26, 2012 Page 3 cc:
U.S. Nuclear Regulatory Commission (Original and 1 copy)
Attn: Docwnent Control Desk Washington, DC 20555-0001 Mr. Elmo E. Collins Regional Administrator U. S. Nuclear Regulatory Commission Region IV 1600 East Lamar Boulevard Arlington, TX 76011-4511 Senior Resident Inspector Callaway Resident Office U.S. Nuclear Regulatory Commission 8201 NRC Road Steedman, MO 65077 Mr. Fred Lyon Project Manager, Callaway Plant Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Mail Stop 0-8B 1 Washington, DC 20555-2738
ULNRC-05927 October 26, 2012 Page4 Index and send hardcopy to QA File A160.0761 Hardcopy:
Certrec Corporation 4150 International Plaza Suite 820 Fort Worth, TX 76109 (Certrec receives ALL attachments as long as they are non-safeguards and may be publicly disclosed.)
Electronic distribution for the following can be made via Tech Spec ULNRC Distribution:
A. C. Heflin F. M. Diya C. 0. Reasoner III D. W. Neterer L. H. Graessle J. S. Geyer S. A. Maglio G. S. Kremer R. Holmes-Bobo NSRB Secretary T. B. Elwood J. B. Little Mr. Bill Muilenburg (WCNOC)
Mr. Tim Hope (Luminant Power)
Mr. Ron Barnes (APS)
Mr. Tom Baldwin (PG&E)
Mr. Mike Murray (STPNOC)
Ms. Linda Conklin (SCE)
Mr. John O'Neill (Pillsbury Winthrop Shaw Pittman LLP)