ML20237E627
| ML20237E627 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 12/23/1987 |
| From: | Capstick R VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Johnston W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| IEB-80-11, NUDOCS 8712290095 | |
| Download: ML20237E627 (2) | |
Text
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i VERMONT -YANKEEL NUCLEAR POWER CORPORATION RD 5. Box 169, Ferry Road, Brattleboro, VT 05301 y,g ENGINEERING OFFICE g
1671 WORCESTER ROAD FRAMINGHAM. MASSACHUSETTS 01701 TELEPHONE 6 t f-872-8100 e
December 23, 1987 FVY 87-119 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 Attention:
Mr. William V. Johnston, Acting Director Division of Reactor Safety.
References:
(a) License No. DPR-28 (Docket No. 50-271)
(b) Letter, VYNPC to USNRC, FVY 86-85, dated September 19, 1986 (c) Letter, USNRC to VYNPC, NVY 86-219, dated October 23,.1986, NRC Inspection Report No. 86-17 (d) Letter, VYNPC to USNRC, FVY.86-108, dated November 21, 1986 (e) Letter, VYNPC to USNRC, FVY 86-119. dated December 30, 1986 (f) Letter, VYNPC to USNRC, FVY 87-03, dated January 5, 1987
Subject:
IE Bulletin 80-11, Masonry Wall Design
Dear Sir:
By letter, dated January 5, 1987 [ Reference (f)], Vermont Yankee notified you of our intention to complete certain corrective actions associated with our expanded Bulletin 80-11 Program involving Turbine Building masonry walls prior to startup from our 1987 refueling' outage. The purpose of this letter is to inform you of the specific corrective actions implemented during the 1987 outage and provide you with a summary status of Vermont Yankee'sBulletin 80-11 Program.
The following summarizes the structural or electrical modifications I
implemented for each of the four Turbine Building walls during the 1987 refueling outage.
The modifications to Turbine Building Block Wall, Column Line 10 consisted of removing the upper portion of the wall and adding t:tructural framing to support the lower (approximately 10'-6" high) portion of the block wall..
The modifications to Turbine Building Block Wall, Column 9 consisted of removing blocks above and around the safety class conduits and replacing these blocks with a sheet metal barrier.
The modifications to Turbine Building Block Wall, Column Line 7 consisted of relocating controls and associated cables for the Diesel Generator and ECCS
. Equipment Ventilation Systems from this area. In addition,' conduits which 3 '\\
6 8712290095 871223 O
PDR. ADOCK 05000271 O
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'e United States Nuclear Regulatory Commission December 23, 1987 Att'ention:
Mr. William V. Johnston Page 2 P
contain cables for the Control HVAC System pass through this wall and are partially shicided by existing building steel. An evaluation of these conduits was performed for the impact of falling blocks and was concluded to not adversely affect the conduits structural integrity, thus relocation / protection of these conduits was not necessary. The modifications to Turbine Building Block Wall, Column Line 6 consisted of relocating conduits containing Control Room HVAC cables and providing structural framing as a i
shielding barrier in the area where these conduits are located adjacent to the j
wall.
1 The following information is herein submitted to provide a summary status of Vermont Yankee's IE Bulletin 80-11 Program.
Vermont Yankee has completed its program to stencil or place signs on or near masonry walls providing a physical means to control work activities which
.)
could affect requirements specified in IE Bulletin 80-11.
Pertinent sections j
of the Yankee Atomic Electric Company (YAEC) Nuc1 car Services Division (NSD) l Engineering Manual have been revised providing procedural design control to alert personnel of IE Bulletin 80-11 concerns.
During the 1987 refueling outage, Vermont Yankee Project Procedure VYP-007, " Masonry Wall Routine Surveillance Procedure," was implemented.
This procedure contains as-built drawings of all IE Bulletin 80-11 masonry walls.
It also provides a means for identification and ensuring timely resolution of any degradation of the walls which may invalidate assumptions used in the record analyses. As a result of the routine surveillance conducted during the 1987 refueling outage, all walls required to be controlled per the requirements of IE Bulletin 80-11 were inspected and determined to conform to the record analyses.
Future inspections will be performed during scheduled outages on an ongoing basis such that during each ten year interval, all safety related masonry walls are reviewed. This rotating schedule will be performed such that a sampling of all areas at Vermont Yankee which contain these walls are inspected during each scheduled outage.
We trust that the information is satisfactory; however, should you have any questions or require additional information concerning this matter, please contact this office.
Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION c
R. W. Capstick Licensing Engineer RWC/25.237