ML19341B048
| ML19341B048 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 12/03/1980 |
| From: | Heider L VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-17, WVY-80-167, NUDOCS 8101300092 | |
| Download: ML19341B048 (2) | |
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h VERSIONT Y ANKEE NUCLEAR POWER CORPORATION D
SEVENTY SEVEN GROVE STREET B.4.1.1.
RUTLAND. VERMONT 05701 WY 80-167 7
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TELEPMOpeE 617 166-9011 December 3, 1980 UnitediStates Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Avenue King of Prussia, Pennsylvania 19406 Attention:
Mr. Boyce H. Grier, Director
Reference:
(a) License No. DPR-28 (Docket No.50-271)
(b) USNRC letter to VYNPC dated August 22, 1980 IE Bulletin No. 80-17, Supplement 3 (c) VYNPC letter (WY-80-125) to USNRC dated September 2,1980 Response to IE Bulletin No. 80-17, Supplement 3
Subject:
Change to Response to I.E. Bulletin No. 80-17, Supplement 3, Item I
Dear Sir:
Reference (c) provided VYNPC's Response to Reference (b).
Since the time of this response additional plant modifications have been made that change the indications available to the control room operator. Because of these changes our response to Item 1 of reference (b) is revised to read as follows:
Response: Vermont Yankee Operating Procedures will be revised to require an immediate manual scram from low control rod drive air header pressure of 10 psig above the opening pressure of the scram outlet valve based on control room indication.
The above changes are made reluctantly at the insistence of the NRC. Vermont Yankee has installed Control Room Indication of both Scram Discharge Volume Water Level and Scram Pilot Air Header Pressure, With both these indications available to the operator, we feel that an immediate manual scram on low air pressure alone is unnecessary. Vermont Yankee believes that action based on diverse signals whenever practical is preferable to action based on a single indication. We sincerely hope that further review of this item is forthcoming and that your position will become more flexible.
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H United States Nuclear Regulatory Commission December 3, 1980 Attention:
Mr. Boyce H. Grier, Director Page 2 The following information is submitted in response to your request for estimates of manpower expended in the research and subsequent performance of actions associated with this Bulletin. These hours are in addition to those previously reported for this bulletin.
Manpower Requirements Hours Bulletin Response 30 Manhours Corrective Actions 156 Manhours k'e trust that this information is satisf actory; however, should you desire additional information, please contact us.
Very truly yours, VERMONT YANKEE NUCLEAR P0k'ER CORPORATION Y
L. H. Heider Vice President