ML20137F414
| ML20137F414 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 08/19/1985 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Knighton G Office of Nuclear Reactor Regulation |
| References | |
| 2NRC-5-119, NUDOCS 8508260212 | |
| Download: ML20137F414 (2) | |
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Duquesne Lidit 2NRg-3,gi9 Nuclear Construction Dmsson Telecop Robinson Plata, Building 2. Suite 210 pittsburgh, PA 15205 August 19, 1985 United States Nuclear Regulatory Commission Washington, DC 20555 ATTENTION:
Mr. George W. Knighton, Chie f Licensing Branch 3 Of fice of Nuclear Reactor Regulation
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docke t No. 50-412 Valve Stem Leak Collection System Gentlemen:
As discussed in the Duque sne Light Company (DLC) comments on the Final Environmental Statement Cons truct ion Permit Stage dated July 19 73, DLC committed to install a " leak collection system" on all main steam valves 2-1/2 inches and larger and all auxiliary steam valves 8 inches and larger in the turbine building.
DLC has reviewed this commitment and has determined that this " leak collection system" is not required to limit the non-accident offsite dose to a value below that associated with 10CFR50, Appe ndix I subsection RM-50-2.
As discussed in the BVPS-2 Environmental Report-Operating License Stage Sect ion 5.2 and indicated in Final Safety Analysis Repo rt-Ope rat ing Licensing Stage Table 11.3-6, the BVPS-2 turbine building releases we re c alculated based on a leakage rate of 1700 lbs/hr.
This leakage rate is based on NUREG 0017, " Calculation of Releases of Rad ioact ive Materials in Gaseous and Liquid E f fluent s from Pressurized Water Reactors," which indi-cates the gaseous source term related to turbine building releases may be evaluated based on a leakage rate of 1700 lbs/hr, unless special design features are provided to reduce leakage from steam line valves on lines 2-1/2 inches in di a.ne t e r o r la rge r, in which case a leakage rate of 340 lbs/ day is acceptable.
Since the doses associated with this leakage (1,700 lbs/hr) are less than RM-50-2 criteria without taking credit fo r the leak collection system, and because the presence of this system will complicate maintenance through-out the operating life of the plant, DLC is proposing to revise its commit-ment to delete the leak collection system.
Your concurrence is requested within 60 days in order to incorporate this change in the BVPS-2 construction sched ule, at wh ich time the FSAR (Table 11.3-6) will be revised.
in addition to the NUREG 0017 analysis, DLC is installing a Digital Radiation Monitoring System designed to detect rad i a-tion in selected process streams and ef fluents throughout BVPS-2 (FSAR Section 11.5).
8500260212 850019
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United States Nuclear Regulctory Commission Mr. George W. Knighton, Chief Valve Stem Leak Collection System Page 2 I f you have any ques t ions, please contact Mr. T. J. Zogimann at (412) 787-5141.
DUQUESNE LIGHT COMPANY By J. 'T.(jare y Vice President TJZ/wjs ec:
Mr. B. K. Singh, Project Manager Mr. G. Walton, NRC Resident Inspector COMMONWEALTH OF PENNSYLVANIA )
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COUNTY OF ALLEGHENY
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On this
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day of tytzg(
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Notary Public in and fo r said Commonwdalth and County, personally appeared
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Carey, who being duly sworn, deposed and said that (1) he is Vice P re s ide nt of Duquesne Light, (2) he is duly authorized to execute and file the foregoing Submittal on behalf of said Company, and (3) the statements set forth in the Submittal are true and correct to the best of his knowledge.
O b > & i l - o A t c.'/
Notary Pu 1c AfiltA LL A:f.E Pr.itrn, NotAr<Y FUBUC ROBINT.ON TOWN!:Hh', ALLt.CHEN( CGUNTY MY COMMIS$f 0N EWES OC703:n 20, nse,
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