ML20207M788
| ML20207M788 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 02/18/1999 |
| From: | Mulligan M NRC |
| To: | Katz D NRC |
| Shared Package | |
| ML20207M781 | List: |
| References | |
| NUDOCS 9903190190 | |
| Download: ML20207M788 (2) | |
Text
' [Tajuan CZrCr - Vermont Ytnkee andWRC safety Concern.
Pag 31]
e From:
" Michael Mulligan" <m. mulligan @woddnet.att. net >
To:
" Deb Katz" <can@shaysnet.com>, Mike D" <necnp@sov..
Date:
Thu, Feb 18,199912:57 PM
Subject:
Vermont Yankee and NRC safety Concern.
Mr. Dricks I got a concern (one of many) with the latest NRC inspection 98-14.of Vermont Yankee. I've generally noticed a lot of problem with equipment
- failures and trips with the primary containment system. From a broad array of problems these failures questions whether VY is maintaining the reliability of the containment function, even if the equipment problem
- causes a trip into the safe condition.
In addition:
- 1) The ARM for the Reactor Building ventilation is analyzed in the ability of the detector to work accurately on the low voltage, but is never discussed in the terms of will the degradation of the voltage degrade primary containment in the future. It's like getting a hole in your tire on the highway and hearing the hissing of the escaping air; then thinking it can't be the tire because I don't feel it in the steering wheel...yet. What is the historical record of these types of instruments.
- 2) M3.1b-under the Maintenance rule-Acquiring Performance data-talks about two reactor building ventilation trips due to the cold weather. My question is the inspectors not having problems with these ventilation trips and the meaning with that. The building ventilation in the plant design should have enough margin to handle any cold weather that the region has to offer similar to the similar to the margins of the worst case seismic event. Cold weather is never an excuse for these equipment problems and it will divert the control room resources from monitoring the plant. The trouble with a simple problem like this is it could give the public insights how the utility is maintaining plant equipment: are we fulfilling some administrative requirement but losing the big picture.
mike I
l b
9903190190 990312 PDR ADOCK 05000271 J
P PDR j
i l
i
)
l o
~x..
j l
l FROM:
ORIGINAL DUE DT: 03/19/99 TICKET NO: 019990060 DOC DT: 02/23/99 NRR RCVD DATE: 03/02/99 TO:
-NRC FOR SIGNATURE OF :
- YEL DESC:
ROUTING:
Vermont Yankee Collins /Zimmermn Kane l
Sheron NRR Mailroom l
ASSIGNED TO:
CONTACT:
DRPE Zwolinski SPECIAL INSTRUCTIONS OR REMARKS:
ACTION D :_7_ T. D ' '.r.., n.'.r, s.,'< r "'e r c r..
su iva
_8, /(,._ 99_
SY I
f I
l t
w cc-n