ML20049H751
| ML20049H751 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 02/19/1982 |
| From: | Jackie Cook CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| To: | Kepple J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, 16107, 82-02-#1, 82-2-#1, 82-2-1, NUDOCS 8203030508 | |
| Download: ML20049H751 (6) | |
Text
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Q Vice President - Projects, Engineering and Construction 82-02 #1 General Offices: 1945 West Parnell Road, Jackson, Mt 49201 * (517) 788-0453 February 19, 1982
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Mr J G Keppler, Regional Administrator b
US Huclear Regulatory Commission Region III RECElVED 3
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hStem MIDLAND PROJECT -
I DOCKET NOS 50-329 AND 50-330 0,
8 RODEITI' DAMAGE TO ELECTRICAL PENETRATION WIRII'G AND CABLES N
FILE:
0.h.9 58 SERIAL:
16107 This letter provides an interim 50 55(e) report concerning rodent damage to electrical penetration wiring and cables.
This condition was reported to Mr D C Boyd of your staff on January 20, 1982. The attachments to this letter provide a description of the problem and the corrective actions being taken to correct the situation.
Another report will be sent on or before April 15, 1982.
6 WRB/lr Attachments:
(1) Bechtel Management Corrective Action Report #56, dated February 9, 1982 (2) Bechtel Management Corrective Action Report #56, Interin Report 1, dated February 17, 1982 l
CC: Document Control Desk, NRC Washingt on, DC RJCook, URC Resident Inspector Midland Nuclear Plant 8203030508 820219 PDR ADOCK 05000329 S
PDR FEB 2 4 1982 W * ^ "*
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2 Serial 16107 62-02 #1 l
CC: CBechhoefer, ASLB Panel RSDecker, ASLB Panel FPCowan, ASLB Panel JHarbour, ASLB Panel AS&L Appeal Panel M4 Cherry, Esq l
MSinclair CRStephens, USNRC WDPaton, Esq, USNRC i
FJKelley, Esq, Attorney General SHFreeman, Esq, Asst Attorney General WHMarshall GJMerritt, Esq, THK&J Great Lakes QA Managers i
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OUALITY ASSURANCE PROGRAM At+achment 1 MANAGEMENT CORRECTIVE ACTION REPORT serial 16107 MCAR-1 82-02 #1 56 REPORT NO.:
JOB NO.:
7220 gg g
Q N O.:
' DATE:
February 9, 1982 I DESCRIPTION * (including References):
Rodent damage has occurred in electrical penetration wiring and cables. The damage consists of chewed insulation on a number of wires, resulting in exposed and partially covered conductors. This condition is documented on CPCo NCR M01-9-1-165, SCRE-39 and CPCo letter Serial: CSC-5830.
RECOMMENDED ACTION * (Optional):
a)
Take immediate action to minimize any further rodent damage to penetration wiring (Construction) b)
Inspect, identify, and establish extent of all damaged wiring and cables.
c)
Initiate the appropriate actions to repair or replace the damaged parts of the electrical penetrations.
d)
Determine root cause and take appropriate corrective action to preclude recurrence.
e)EFERRED TO: interim report by February 16, 1982.
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NRC was notified by ti.e client on 1/20/82 as potentially reportable under 50.55(e).
Il REPORTABLE DEFICIENCY:
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82-02 #1 Serial 16107 Bechtel Associates Professional Corporation 559002169 9 7
Subject:
MCAR 56 (issued 2/11/82)
Rodent Damage to Electrical Penetration Wiring and Cables Date:
February 17, 1982 Project:
Consumers Power Company Midland Plant Units 1 and 2 Bechtel Job 7220
References:
A) CPCo Letter, Serial CSC-5830, 12/3/81 B) CPCo NCR M01-9-1-165, 12/28/81 C) SCRE No. 39, 1/15/82 Introduction This report provides interim status and the course of corrective action required pursuant to MCAR 56.
Description of Deficiency During post construction surveillance inspection of the Class lE electrical penetration assemblies (EPAs), assembly 2Z135 revealed rodent damage to the outboard side module wiring. The damage consisted of chewed insulation resulting in exposed and/or severed conductors. Subsequent inspection of additional Class lE assemblies revealed damage of the same nature.
Probable Cause The deficiency is a result of rodents entering / nesting in the EPAs and chewing on module wiring. Access into the EPAs was via the cable feedthrough nipples.
Corrective Action To date the following corrective actions have been taken to resolve the subject deficiency.
A)
Construction has initiated a re-emphasis on rodent control including:
1.
Removal of all nesting and debris from the EPA sleeves 2.
Additional rodent baiting with revised location of the bait 3.
An increase in the frequency of surveillance by the rodent control subcontractor.
4.
Administrative control of the areas containing EPAs 4
Bechtel Associates ProfessionalCorporation a59I69 MCAR 56 Page 2 B)
Construction has comp'.eted its inspection of all EPAs used for Class 1E circuits to determine the extent of damage.
C) 1)
Engineering has obtained and accepted repair / replacement procedures from the EPA manufacturer. These procedures include Vendor Prints 7220-E-20-182-1 and 7220-E-20-183-1. The EPA manufacturer has also approved the use of field procedures FPE 7.000 " Cable Terminations" and FPE 8.000 "Non-Class lE Wire and Cable Splicing" for use in the repair of damaged EPA modules.
2)
Construction is repairing damaged module wires in accordance with the accepted procedures.
3)
Where extensive damage precludes repair, the damaged module will be replaced in accordance with the manufacturers procedures.
D)
The root cause has been determined to be a breakdown in site housekeeping and the unsealed cable entrances into the outboard EPA junction boxes. Appropriate corrective action to preclude reoccurrence will be addressed in the next interim report.
Safety Implications The damage consisted of chtwed insulation resulting in exposed and/or severed conductors. Exposed conductors could result in circuit shorts and severed conductors could result in circuit discontinuities, therefore, Class 1E equipment necessary to safely operate the plant may have failed to operate.
Forecast Date on Corrective Action a)
A list of all safety related circuits affected by rodent damage will be provided by March 1, 1982.
Bechtel Associates ProfessionalCorporation 659027 059I69 Mcia 36 Page 3 b)
A schedule of all damage repair / replacement will be included in the next interim ryort.
JG /CS/jas(E) 2/12/4 Submitted by:
g)fs d.G. Kovach Electrical Group Supervisor Approved by:
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< M.M. Hughes Ann Arbor Project Engin Concurrence by Ell. Smith %
Engineering Manager
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