ML20133M634
| ML20133M634 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 10/22/1985 |
| From: | Hunter D VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| FVY-85-98, NUDOCS 8510280161 | |
| Download: ML20133M634 (3) | |
Text
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VERMONT YANKEE NUCLEAR POWER CORPORATION RD 5, Box 169 Ferry Road, Brattleboro.VT 05301
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ENGINEERING OFFICE 1671 WORCESTER ROAD FRAMINGHAM. MASS ACHUSFTTS 01701 Ytt Ep*.ome air en-stoo October 22, 1985 FVY 85-98 United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention:
Office of Nuclear Reactor Regulation Mr. H. R. Denton, Director
References:
(a) Licenso No. DPR-28 (Docket No. 50-271)
(b) Lotter, YAEC to NRC, FVY 83-4, dated January 14, 1983
Subject:
Review and Licensing Approval of Yankee's RELAPSYA Computer Program for LOCA Analyses
Dear Sle:
By letter dated January 14, 1983 [ Reference (b)), Yankee submitted RELAPSYA, a Computer Program for Light-Water Reactor System Thermal-Hydraulic Analysis, to NRC for review and licensing approval.
Since that time, we have provided several additional submittals and hold numerous discussions with your staff concerning the Code's development and topical licensing review.
During the discussion with your staff regarding the status and future schedulo of NRC's review of the RELAPSYA Code, your staff indicated that NRC resources were such that a full commitment could not be made to perform the necessary safety evaluation reviews on a schedulo consistent with that outlined in to thin lotter. Vermont Yankee acknowledges the substantial level of NRC resources required to comploto the licensing review of the Code on a timely schedulo; therefore, Vermont Yankeo management is willing to meet and discuss the significant safety benefits resulting from this effort prior to the expenditure of further resources.
The development of this plant-specific analytical capsbility was initiated over five years ago and is consistent with NRC's efforts to promote safety-related development efforts of this kind. The RELAPSYA Code will provide Vermont Yankee with a LOCA analysis capability that will cover the entire break size and location spectra for LOCA events in a manner which conforms to the requirements contained in 10CFR50.46 and Appendix K.
Vermont Yankco considers the development and licensing of the RELAP5YA LOCA Codo to be one of high importance and one in which NRC's review schedule has direct impact upon our planned application of this method for Vermont Yankee's Cycle 14 high energy bundle reload.
8510200161e5gj7g PDH ADOCK p p,g i
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l United States Nuclear Regulatory Commission October 22, 1985 Attention:
Mr. H. R. Denton Page 2 i
l Therefore, due to the importance of the RELAPSYA LOCA Code development to Vermont Yankee and the impact of the NRC Licensing review schedule upon its i
planned application, Vermont Yankee management is willing to meet with you to discuss the commitment of resources neceasary to ensure timely completion of the Code's licensing review. We look forward to the opportunity to discuss this issue with you in the near future.
Very truly yours, VERMO.NI-YANKEE NUCLEAR POWER CORPORATION l
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D. Ilunter l
Vice President j
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i VY LOCA LICENSING ANALYSIS SCHEDifLE 1985 1986 1987 1989 TASK IQ 2Q 3Q 4Q IQ 2Q 30 4Q IQ 2Q 3Q 4Q IQ 2Q 3Q 4Q i
- 1. RELAP5YA QUESTIONS / ANSWERS a.
General Ouestions (197) b.
Additional Questions (39) 2 c.
NRC Review 1
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YAEC Perfom 4
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NRC Reviev
YAEC Perfom b.
NRC Review
. 12 CYCLE 13
,CYC1.E 14 VY PROJECTED OPERATION: l (TB)
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