ML20199E271
| ML20199E271 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 03/13/1986 |
| From: | Murphy W VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Muller D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20199E275 | List: |
| References | |
| FVY-86-23, NUDOCS 8603260004 | |
| Download: ML20199E271 (2) | |
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VERMONT YANKEE NUCLEAR POWER CORPORATION RD 5, Box 169, Ferry Road, Brattleboro, VT 05301
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. g ENGINEERING OFFICE 1671 WORCESTER ROAD
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A HA AS ACHUSEUS01701 March 13, 1986 FVY 86/23 United States Nuclear Regulatory Cormirion Washington, DC 20555 Attention:
Office of Nuclear Reactor Regulation Mr. Daniel R. Muller, Director BWR Project Directorate No. 2 Division of BWR Licensing
References:
(a) License No. DPR-28 (Docket No. 50-2J1)
(b) Letter, USNRC to VYNPC, SER, dated November 27, 1981 (c) Letter, USNRC to VYNPC, SER, dated September 15, 1982 (d) Letter, USNRC to VYNPC, SER, dated September 27, 1985 (e) Appendix A to Operating License No. DPR-28 (Docket No. 50-271)
(f) General Electric SIL No. 380, Revision 1, Category 1, "BWR Core Thermal Hydraulic Stability," dated February 10, 1984 (g) Letter, USNRC to All Licensees of Operating BWRs, NVY 86-16, " Technical Resolution of Generic Issue B-19 Thermal Hydraulic Stability" (Generic Letter No. 86-02),
dated January 23, 1986 (h) Letter, VYNPC to USNRC, " Proposed Technical Specification Change for Single Loop Operation and Thermal Hydraulic Stability," dated March 12, 1986
Subject:
Cycle 12 Core Performance Analysis
Dear Sir:
The purpose of this letter is to transmit the enclosed report, " Vermont Yankee (VY) Cycle 12 Core Performance Analysis Report," YAEC-1507, for your information. This report presents the Cycle 12 core performance analysis results using methods developed by VY.
The methods are described in reports previously submitted to you which were reviewed and approved as described in References (b), (c), and (d).
The reports are referenced in YAEC-1507.
Together, these documents form the technical basis for the reload analysis.
The results of the Cycle 12 core performance analysis indicate that the margins of safety provided by limiting conditions of operation specified in the present facility Technical Specifications (Reference (e)) are not
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reduced. We have determined that there are no changes in the probability of 2
occurrence or'in the consequences of an accident or malfunction previously.
C 8603260004 860313 Ok PDR ADOCK 05000271 0
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Unite'd States Nuclear Regulatory Commission March 13, 1986 Attention:
Mr. Daniel R. Muller Page 2 evaluated. Thus, we have determined, pursuant to 10CFR50.59, that operation f
of Cycle 12 does not involve any unresolved safety questions, and there is no need to submit a change to Technical Specifications.
Because of the recent generic resolution of thermal-hydraulic stability-for BWRs using General Electric fuel (Reference (g)), VY intends to implement the stability monitoring recommended by General Electric in Reference (f).
A license amendment request formally incorporating these stability monitoring
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. requirements into the VY Technical Specifications has been submitted in Reference (h).
In the event that the Reference (h) proposed change is not approved by. Cycle 12 startup, VY commits to administratively implement stability monitoring.
j For all the above reasons, we have determined, pursuant to 10CFR50.59, that there are no unreviewed safety questions relative'to the operation of the Cycle 12 core. This determination has been reviewed by the Plant Operations Review Committee and by the Vermont-Yankee Nuclear Safety Audit and Review Committee.
t We trust that this information is satisfactory; however, should you have any questions, please contact us.
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Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATIOli AM^
e=A Warren P. Murphy Vice President and Ma ger of Operations RWC/dps i
Enclosure P
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