ML20214G447
| ML20214G447 | |
| Person / Time | |
|---|---|
| Site: | Columbia  |
| Issue date: | 01/08/1975 |
| From: | Butler W US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Schroeder F US ATOMIC ENERGY COMMISSION (AEC) |
| References | |
| CON-WNP-0045, CON-WNP-45 NUDOCS 8605220150 | |
| Download: ML20214G447 (3) | |
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DISTRIBUTION:
Docket File h
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LWR 1-2 file iMcDonald RCDeYoung RWKlecker l
RTedesco TR AD Cling TR BC J0rndoff PM SVarga LWR 1-2: 75-1 Docket No. 50-397 4 Frank Schroeder, Acting Deputy Director for Technical Review, L TECHNICAL ASSISTANCE REQUEST PLANT:
VPPSS Nuclear Project No. 2 (formerly Hanford-2)
STARTS:
Post-CP Review BRANCH:
LWR l-2 PROJECT MANAGER:
John Orndoff TR BRANCHES INVOLVED:
Auxiliary and Power Conversion Systems DATE REQUIRED:
February 21, 1975 REFERENCF.:
Letter from J. J. Stein, Washington Public Power Supply System to A. Giambusso dated December 3, 1974 with attached technical report (WPPSS 74-2-R6, concept for Hain Steam Isolation Valve Leakage Control System)
DESCRIPTION OF REQUEST: Technical assistance is requested for evaluation of the submittal by WPPSS en drywell-wetwell leakage. This is a post-CP review item ubich is identified in Section 4.5 of the SER. This section of the SER is provided in Enclosure 1 for your convenience.
The above sited WFSS report refers to deemetream block valves appearing in Figure 1, but these valves are act shown in the figure. I have checked with WPSS and they state that these block valves include:
1.
Turbine stop valves, whiah will estisfy asiesic category I critancia(PSAR commitment)I and i
orrac a p ownse nma p pavs >
i Foran AEC 318 (Re. 9 $3) AECM 0240 W u. e. oovan=neemt reenve=0 orricas 9974.534699 8605220150 750108 PDR ADOCK 05000397 E
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TTf1ETICAL ASSISTANCE REQtT.ST 2.
A notor-operated valve in the 24-inch extraction eteam line, which is classified seismic Category I and quality Group C.
Origi"I *IE" y;auer Butkr Waltar R. Bstler, Chief Light Water Raaetors Branch No. 1-2 Directorate of Licensing
Enclosure:
As stated cc:
R. Tedesco C. Long 1
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NC E
- J. Orndoff W._R.
Butler i
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Form AEC.318 (Rev. 9-$3) AECM 0240 W u. s.aovann sur pesatime orrecas sete.sas.see I
4.5 Main Stenu Line Isolation valve Lechene Leakage through the closed Main Stcan Line Isolation Valves (MSLIV) following a postulated LOCA results in an uncertainty in calculating the potential radiological doses. The applicant has ccc-ritted to providing a closed scaling nystem and has in prop.rens a study to select this MSLIV seal t,ystem. -The final design of the colected system will be subnitted for our review prior to its installation.
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