ML20086E222
| ML20086E222 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 02/21/1975 |
| From: | Riley B VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | James O'Reilly NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| AO-75-05, AO-75-5, VYV-3724, NUDOCS 8312060431 | |
| Download: ML20086E222 (1) | |
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[ VERMONT YANKmm NUCLEAR POWER CORPOR A' PION OCVCNTY O tW CN OMOVESTRCCY RUTI.Aau, Vt,.umour osvoi VYV--3724 P. o. cox ss7 VERHON. /ERMOM &: m February 6, 7.975 N
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Unitad States Nuclear Regulatory Conniccion Of fice of Inapection cad Enforccmonc
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NiTENTION:
Jacce P. O'Roilly, Director j_r N Dodot No. 50-271 M
Abaormal occurrence No. A0-75-05 (2411our Report) 3 a
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Ao defined by Technical Specifications for the Vermonc Ycnkee Q,g Nuclear Power station, Section 6.7, we are reporting the following
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Abnormal Occurrence as A0-75-05 and conficcing our tolophone conversation c.3.. f $y; with your of fico.
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3 At approximately 1000 on February 20, 1975, during plant rover oncennion, it was diocovered that the Sample Amaulator Isolation _ Valve
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to the condencor, 0C--9059, was shut.
This caused all flow pact the b} 0 c c
Augroanted Of f-Csa (AUG)~rediation monitors to be blocked, thereby making
,9 theno monitoro inoperabic.
Section 3. 9.B. 2.d o f the Technical Specifications
,y requires that at least one of the tuo radiation monitoring syntetus betuca.n
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the recot:.bince and the first charcoal bed shall be operable during the f'g.Q operation of the A0G Syntein.
Valve 00-9069 was shut during the plant J(c;k.Y.'
,J' outage which coir.c:enced on February 14, 1975, to facilitate maintenance work that was botng perfornud.
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. %, s.w p Upon diccovery, valvo OG-9069 was icredictoly pinced in the open MA:.4 ponition, thereby making the monitora fully operablo.
The plant was f.].p], j?
opurating at 42% power at the citre of discovery.
The secam jet air p
}f ejector ratdiation monitors and the plant att.ck radiation monitors were
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operablo and in service when the AOG System was in service.
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pu x Very truly yours, l;;jg kk Q-N 0
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Bradford W. Riley
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