ML18143B652
| ML18143B652 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna, 05000000 |
| Issue date: | 10/11/1985 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | Harold Denton, Thompson H Office of Nuclear Reactor Regulation |
| References | |
| 85-316, GL-85-06, GL-85-6, NUDOCS 8510180151 | |
| Download: ML18143B652 (3) | |
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VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 W. L. STEWART VICE PRESIDENT NucLEAR OPERATIONS October 11, 1985 Mr. Harold R. Denton, Director Office of Nuclear Reactor Regulation Attn:
Mr. H. L. Thompson, Jr., Director Division of Licensing U. S. Nuclear Regulatory Commission Washington, D. C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNIT NOS. 1 AND 2 NORTH ANNA POWER STATION UNIT NOS. 1 AND 2 RESPONSE TO 10 CFR 50.62(d)
Serial No.
NO/JDH:acm Docket Nos.
License Nos.85-316 50-280 50-281 50-338 50-339 DPR-32 DPR-37 NPF-4 NPF-7 10 CFR 50. 62 (d) requires licensees to develop and submit a proposed schedule for meeting the
- requirements for an Anticipated Transient Without Scram (ATWS) mitigation system within 180 days after issuance of the QA guidance (NRC Generic Letter 85-06, dated April 16, 1985).
Currently, Vepco is evaluating ATWS mitigation systems available through various vendors and industry suppliers. Our evaluation is considering the compliance requirements for both Surry and North Anna and how an ATWS mitigation system must interface with the existing plant design.
Additionally, the procurement lead* time, reliability of available*
systems, and system costs are being studied to provide input to our implementation scheduling effort. This technical engineering evaluation is scheduled to be completed by the end of December 1985.
The evaluation will provide conceptual design information, and estimated engineering costs and schedules.
This will be used to develop construction and total project cost and schedule information to provide an implementation plan to management.
Vepco must then ensure that the proposed implementation plan conforms with our Integrated Living Schedule
- program, cu.rrent ly under development within the company.
This implementation plan is scheduled to be completed by the end of the first quarter, 1986. Therefore, by April 15, 1986, we will inform you of the
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VrnomIA ELECTRIC AND PowER COMPANY To Mr.
Ha r o 1 d R. D e n t on anticipated North Anna and Surry refueling outages for which installation of the selected design is planned.. If this schedule exceeds the guidelines specified in 10 CFR 50.62(d), (i.e., the second refueling outage after Juty 26, 1984), we will work with you as specified in 10 CFR
- 50. 62 (d) to determine a mutually agreeable schedule. Based on our current understanding of the status of this issue both within NRC and in industry, we anticipate our implementation dates will exceed the guidelines.
We note that the NRC is currently reviewing the proposed Westinghouse Generic Design Package (WCAP-10858) for ATWS Mitigating System Actuation Circuitry (AMSAC).
Our evaluation of the interface with existing plant designs is being based, in part, on the Westinghouse generic design. It is anticipated that the NRC staff's review will not significantly alter the AMSAC design basis proposed by Westinghouse. However, if changes are made to the Westinghouse AMSAC generic design basis as a result of the staff's SER, Vepco may require additional time to factor such changes into our evaluation.
If you have any questions, or need additional information, please contact us.
Very truly yours,
\\~
W. L. Stewart
e Vrnornu. ELECTRIC AND PoWER COMPANY To Mr. Har o 1 d R.
D en t o n cc:
Dr. J. Nelson Grace Regional Administrator Region II Mr. Steven A. Varga, Chief Operating Reactors Branch No. 1 Division of Licensing Mr. Edward J. Butcher, Acting Chief Operating Reactors Branch No. 3 Division of Licensing Mr. Terence Chan NRC Project Manager - Surry Operating Reactors Branch No.. 1 Division of Licensing Mr. Leon Engle NRC Project Manager - North Anna Operating Reactors Branch No. 3 Division of Licensing Mr. D. J. Burke NRC Resident Inspector Surry Power Station Mr. M. W. Branch NRC Resident Inspector North Anna Power Station e