ML20003B116
| ML20003B116 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 02/05/1981 |
| From: | Rich Smith VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| FVY-81-21, NUDOCS 8102100370 | |
| Download: ML20003B116 (1) | |
Text
'
V ERMON'r Y A N K EE N UCLEAR POWER col &OR ATION 3
SEVENTY SEVEN GROVE STREET 2.C.2.1 RUTI.AND. VERMONT 05701 FVY 81-21 na,cv vo:
February 5, 1981 ENGINEERING OFFICE 1679 WORCESTER ROAD FR AMING H AM. M ASSACH USETTS o17o1 U. S. Nuclear Regulatory Commission vrtresour eir.sva.eioo Washington, D. C.
20555 Attention: Office of Nuclear Reactor Regulation References :
(a)
License No. DPR-28 (Docket No. 50-271)
(b)
Letter, USNRC to VYNPC dated January 27, 1981 dubject:
Clarification of the General Electric / Vermont Yankee Position on Vermont Yankee Fuel Failures
Dear Sir:
The purpose of this letter is to clarify the docuruentation pertaining to corrosion induced fuel failures at the Vermont Yankee plant as requested in Reference (b).
As stated in the December 11, 1979 presentation to the NRC, detailed test and record search data have led Vermont Yankee and General Electric to agree that the corrosion and ribsequent failure was most probably the result of the synergistic effects of v 2riable fuel cladding properties and metallic impurities in the reactor coolant. We characterized this unusual sequence of events as a combination of " tails" of parametric distributions.
Fuel rods with cladding manufactured during the same time period and with a similar manufacturing history as rods which failed in Vermont Yankee have performed satisfactorily in other plants further supporting the synergistic event theory.
The General Electric water chemistry recommendations previously made to customers were sent to the NRC in response to a verbal NRC request.
These recommendations are primarily focused on reducing and controlling radiation levels due to corrosion product buildup in piping systems and are certainly not intended as a summary of the December 11, 1979 meeting in your offices.
We trust this clarification eliminates the apparent conflict in documentation previously submitted in regard to the corrosion related fuel failures at the Vermont Yankee plant.
Should you have any further questions in regard to the above, please do not nesitate to contact the undersigned.
of Z'
~
y, toy Very truly yours, 2
. f VERMONT YANKEE NUC EAR POWER CORPORATION
)
A[
a ca R. L. Smith
/
IU '
Engineer - Licensing-
@O m
U
- -