BVY-90-006, Forwards Addl Info Re Testing of Cable Vault C02 Suppression Sys During 891031-1102,per NRC 890518 & 0821 Requests.Encl Final Test Rept Demonstrates That Carbon Dioxide Sys Will Satisfy Design Bases for Greater than 10 Minutes in Room
| ML19354E800 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 01/16/1990 |
| From: | Murphy W VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML19354E801 | List: |
| References | |
| BVY-90-006, BVY-90-6, NUDOCS 9002010376 | |
| Download: ML19354E800 (2) | |
Text
-
. VERMONT YANKEE
' NUCLEAR POWER CORPORATION
.6 p
i S
Ferry RCad, Brattleboro, VT 05301-7002
)
~
ENGINEERING OFFICE i
f,60 MAIN $f Atti BOLToN. M A 01740 u.oe m m ii January 16, 1990 f
U.S. Nuclear Regulatory Commission i
Washington, D.C.
20555 l
Attention:
Document Control Desk
References:
a)
License No. DPR-28 (Docket No. 50-271) b)
Letter, USNRC to VYNPC, NVY 89-108, dated 6/18/89 c)
Letter, VYNPC to USNRC, BVY 89-48, dated 6/2/89 d)
Letter, USNRC to VYNPC, NVY 89-172, dated 8/21/89 e)
Letter, VYNPC to USNRC, BVY 89-101, dated 10/30/89 i
Dear Sir:
Subject:
Vermont Yankee Cable Vault CO2 Alternate Testing The purpose of this letter is to provide the additional information you requested regarding the testing of our Cable Vault CO2 Suppression System during the period October 31 - November 2, 1989, i
As described during our telecon with your Mr. C. Anderson and Mr. D. Notley i
on November 8, 1989, we performed alternate testing of this system.
The testing was conducted with the support of RETROTEC Energy Innovations Limited and demonstrated that the installed Carbon Dioxide Suppression System will, if required, operate as designed. During the above referenced telecon, we for-warded preliminary test results and informed you that on this basis we would t
declare the subject system operable.
In addition, as we agreed, a once per two hour " Fire Watch" has been implemented as a compensatory measure until a final test report was received from the vendor and the NRC had the opportunity to review this document and our assessment of the test results.
l The final test report is provided as Attachment A to this letter. The pre-liminary test report and calculations for which our preliminary determination i
(and our November 8, 1989 telecon) was based is also provided as Attachment B.
-l The test reports demonstrate that the pressures developed as a result of the dynamic discharge are low and that the structural integrity of the enclosure i
will not be compromised.
It also. demonstrates that the Carbon Dioxide System will satisfy the design bases by providing a 50% concentration of CO2 for greater than ten minutes throughout the room.
l Based upon the testing performed and the attached supporting reports, we have confirmed that we have a fully operable Cable Vault CO2 Fire Suppression i
system that will operate as designed.
bp'M[I 9002010376 900116 b
PDR ADOCK 05000271 i
P PDC
\\
}
2 q
VERMONT YANKEE NUCLEAR POWE',7 CORPORATION I
U.S Nuclear Regulatory Commission C January 16, 1990 Page 2 2
We trust this information responds to your concerns regarding the operabi-1 lity of our Cable Vault 002 system; however, should you have any questions or require additional information concerning this matter, please do not hesitate to contact us.
Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION f
WarrenP. Murphy /j
~
Vice President anF Manager of Operations
/dm cc: USNRC Regional Admi,- trator, Region I USNRC Resident Inspector, VYNPS USNRC Project Manager, VYNPS l
i