ML19309H063
| ML19309H063 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 03/20/1980 |
| From: | Conway W VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-03, IEB-80-3, NUDOCS 8005080284 | |
| Download: ML19309H063 (2) | |
Text
_
8 0 U 5 0 8 02W Q
VERMONT YAN KEE NUCLEAR POWER CORPORATION SEVENTY SEVEN GROVE STREET B.4.1.1.
RUTLAND, VERMONT 05701 WY 80-46 REPLY TO:
ENGINEERING OFFICE TURNPtKE RO AD WESTBORO. M ASS ACHUSETTS 01581 7""
March 20, 1980 United States Nuclear Regulatory Commission Office of Inspection and Enforcement Region I 631 Park Aven2e King of Prussia, Pennsylvania 19406 Attention:
Mr. Boyce H. Grier, Director
References:
(1) License No. DPR-28 (Docket No. 50-271)
(2) USNRC Letter to VYNPC dated February 6, 1980, IE Bulletin 80-03
Subject:
Response to Bulletin 80 Loss of Charcoal from Standard Type II, 2 Inch, Tray Adsorber Cells
Dear Sir:
As requested in Reference (2) above, Charcoal Adsorber Cell Integrity was evaluated at Vermont Ycnkee.
The Standby Gas Treatment System utilizes the only adsorber cells necessary for plant operation. These cells are manufactured by Mine Safety Appliances (MSA) or Nuclear Consulting Services, Inc. (NUCON) and are fabricated to the specifications of MSA part number A-SK-174-1552 with a maximum rivet spacing of four inches.
A freon leak test was performed 3/17/80 with bypass leakage verified to be within the limits of plant technical specifications.
A charcoal test sample was also removed at that time and a visual inspection was performed. There was no indication of loose charcoal on the floors of the filter housing or on adjacent surfaces of the adsorber cells. There was also no evidence of any screens sagging away from the tasing.
Based on the above and no prior record or indications of loss of charcoal, it is determined that the charcoal adsorber cells in use at Vermont Yankee do not have the potential for loss of charcoal.
We trust the above supplied information is satisfactory; however, should you desire any additional information, do not hesitate to call.
Very truly yours, VERMONT YANKEE MUCLEAR POWER CORPORATION A i s.aA /s W. F. Conway Manager of Operations RLS/saw l