BECO-85-178, Provides Schedule to Implement Requirements of Final ATWS Rule (10CFR50.62)
| ML20138B170 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 10/07/1985 |
| From: | Harrington W BOSTON EDISON CO. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| BECO-85-178, NUDOCS 8510150181 | |
| Download: ML20138B170 (2) | |
Text
EOSTON EDIEDN COMPANY GOO BOYLaTON STREET BOSTON, M ASsACHus ETTs 0219 9 WILLIAM O. H ARRINGTON c................,
... su.
October 7, 1985 BECo 85-178 Mr. Ha~rold Denton, Director Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D. C.
20555 License DPR-35 Docket 50-293
Subject:
Compliance with the Anticipated Transient Without Scram (ATHS),
Final Rule, 10CFR50.62, Dated June 26, 1985 - Implementation Schedule (10CFR50.62(d))
Referer.ce:
1.
Generic Letter 85-06: Quality Assurance Guidance for ATWS Equipment that is not Safety-Related, dated April 16, 1985.
2.
Generic Letter 85-03:
Clarification of Equivalent Control Capacity for Standby Liquid Control Systems, dated January 28, 1985.
3.
Denton, H.R. to Fulton, J.M., NRC Letter Regarding Clarification on the Impact of the ATHS Rule on the Existing Technical Specification, dated August 19, 1985.
4.
Harrington, W. D. to Vassallo, D. B. "Long Term Program -
Semiannual Update", BECo Letter #85-169, dated September 18, 1985
Dear Sir:
i The Final Rule on Anticipated Transient Without Scram (ATHS) requires Boston Edison Company to submit to the NRC a proposed schedule for meeting the requirements of the rule.
Further, the rule requires BECo to submit the schedule by 180 days after the issuance of the QA guidance for non-safety related ATHS equipment.
By Reference 1, BECo received the QA guidance on April 23, 1985. Accordingly, in conformance with 10CFR50.62(d), the following schedule is provided to implement the requirements of the ATHS Rule.
1.
10CFR50.62(c)3:
A diverse and independent Alternate Rod Injection (ARI)
System with redundant Scram air header exhaust valves.
This has been implemented by BECo. No further action on this is necessary.
0(fh 8510150181 8D300/
PDR ADOCK 05000293 i e p P
BOSTON EDISON COMPANY Dr. Harold Denton, Director October 7, 1985 Page 2 2.
10CFR50.02(c)S:
Equipment to trip the Reactor Coolant Recirculaticn Pumps automatically under an ATHS condition.
This has been implemented by BECo.
No further action on this is necessary.
3.
10CFR50.62(c)4:
A Standby Liquid Control System (SLCS) with a minimum flow of 86 GPM, and a boron content equivalent of 13% by l
weight of Sodium Pentaborate Solution.
Pilgrim Nuclear Power Station (PNPS) has a Standby Liquid Control System.
The existing SLCS will either be modified or upgraded to meet the above requirement based upon the guidance and clarification provided by the NRC in References 1, 2 and 3.
This potential modification has been included in cur Long Term Program - Semiannual Update (Reference 4) and is targeted for completion in RF0 #8.
He are finalizing our detailed planning and scheduling through our LTP processes.
Future changes to the ATWS modification schedule, if necessary, wili be made through our LTP -
Semlannual submittals.
Should you wish to have any further information regarding the letter, please contact us.
Very truly yours, k
cc:
Mr. Domenic B. Vassallo, Chief Operating Reactors Branch #2 WGL/kmc
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