IR 05000259/1986024
| ML18031A677 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 07/18/1986 |
| From: | Brady J, Cantrell F, Andrea Johnson NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | |
| Shared Package | |
| ML18031A676 | List: |
| References | |
| 50-259-86-24-MM, 50-260-86-24, 50-296-86-24, NUDOCS 8608110391 | |
| Download: ML18031A677 (21) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION
REGION II
101 MARIETTASTREET, N.IN.
ATLANTA,GEORGIA 30323 Report Nos.:
50-259/86-24, 50-260/86-24, and 50-296/86-24 Licensee:
Tennessee Valley Authority 6N38 A Lookout Place 1101 Market Street Chattanooga, TN 37402-2801
.
H. John on Approved by:
J dM>a a~
F.
S. Cantrell, Sectio f
Division of Reactor Projects Docket Nos.:
50-259, 50-260, and 50-296 License Nos.:
DPR-33, DPR-52, and DPR-68 Facility Name:
Browns Ferry 1, 2, and
Inspection Conducted:
June 24, 1986 Project Engineers:
J B. Brady Date Signed 7//>/s Date Signed r /<~ s~q ate Signed SUMMARY A management meeting was held at Region II on June 24, 1986, at 11:00 a.m.
EDT to discuss cable pulling issues.
TVA's revised specifications for installation of electrical cable and conduit were not implemented for modifications at Browns Ferry when issued.
TVA gave a chronology of events concerning cable pulling including 1) which sites were using the new specifications, 2) the rationale for using the old specification at BFNP Unit 2, 3)
BFNP corrective actions taken since the June 17th.
TVA hold on cable pulling, 4) the ongoing BFNP cable integrity verification program, and 5) the requirements for lifting the stop won'
order. 'VA characterized their 'arlier deci sion not to implement the G38/40 specifications aO BFNP Unit 2 as not aggressive.
The NRC concurred in the requirements for lifting the stop work order and wanted to look at the test results justifying the old installations.
TVA was requested to provide a formal written position concerning cable pulling activities at Browns Ferry.
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REPORT DETAILS Attendance NRC A. F.
G.
G.
S.
P.
F.
S.
G.
L.
T.
O.
A. H.
J.
B.
Gibson, Director, Division of Reactor Safety (DRS)
lech, Director, TVA Projects, Division of Reactor Projects (ORP)
Weise, Branch Chief, ORP Cantrell, Section Chief, DRP Paulk, Senior Resident Inspector, DRP Gibbons, Electrical Engineer, DRS Johnson, Project Engineer, DRP Brady, Project Engineer, ORP TVA R.
L.
W.
C.
J.
P.
W. S.
G.
G.
MD J.
T ~
E.
J.
H.
D.
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Gridley, Director Nuclear Safety and Licensing Bibb, Browns Ferry Site, Director (BFNP)
Stapleton, Engineering Manager (BFNP)
Raughley, Chief Electrical Engineering Branch Turner, guality Manager (BFNP)
May, Manager of Licensing (BFNP)
Burdette, equality Assurance Rinne, Modifications Manager (BFNP)
Fulkner, Electrical Lead Engineer (BFNP)
Event Discussions Mr. S.
P.
Weise reviewed the NRC understanding of new cable pulling specifi-cations and implementation at TVA sites.
The new specifications were in response to September 1985 Watts Bar concerns.
The resident inspectors at Browns Ferry have observed cable pulling using the old specifications.
The meeting was called because the NRC believed TVA had committed to using the new cable pulling specifications at all sites.
To clarify TVA's position, a docketed submittal was requested and committed to by TVA to:
1)
Describe how safety-related cable that was pulled using the TVA G3/G4 specifications will be evaluated/qualified 2)
Describe TVA's current, position on cable pulling methodology at Browns Ferry Mr. W.
C. Bibb, the Browns Ferry Site Director, opened the meeting for TVA stating that TVA has an entirely new management that is aggressive and active in solving problems.
TVA developed new specifications for pulling cable in response to concerns at Watts Bar in August-September, 1985.
The new specifications were implemented for both Watts Bar and Sequoyah, but Browns Ferry was delayed per an engineering memorandum dated January 15, 198 Tennessee Valley Authority Mr. J.
P. Stapleton presented the major events that led up to this meeting
{see attachment).
The NRC asked if there was widespread knowledge of the decisions contained in the January 15, 1986 memorandum.
TVA confirmed that widespread distribution of the memorandum was made and that two days of meetings were held prior to issuance of the memo.
The justification for not using G38/G40 specifications at Browns Ferry Unit 2 was:
1.
That Unit 2 was the only unit with cable pulling in progress.
2..
The impact on in-progress modifications and maintenance was not known.
3.
Whether conduit would meet G38 instead of G3 was not known.
4.
Whether modifications could be made in ongoing work plans
.
5.
Cable verification programs were already underway.
6.
The risk was known some cables might have to be repulled.
A review was presented of Browns Ferry actions since June 17 to initiate G38/G40 and the BFNP cable integrity verification program.
Mr. W. S.
Raughley discussed the dec'ision to do pulling 'tension and side-wall pressure tests instead of using calculations only.
This decision was due to NRC concerns from Watts Bar.
Watts Bar configurations were used but comparisons will be made to Browns Ferry.
The NRC asked if Browns Ferry would have continued pulling using G3/G4 if the NRC resident inspectors had not identified the continued use of the older specification.
Both Mr. Bibb and Mr. Stapleton answered that the TVA cable verification program and other programs would have picked up the discrepancy within several months.
They described the decision under the old management to not implement G38/G40 immediately, as not aggressive.
They also stated that no significant problems have been identified from the cable verification program currently.
Mr. R.
L. Gridley, representing corporate TVA management, emphasized that TVA's reorganization objective was 1) to put design control into one organization for better control, 2) that deviations to TVA procedures are not authorized,
.aad 3) that there is a corporate commitment to accountability.
Mr.
W.
C. Bibb discussed the requirements to be sent out June 25, 1986, to lift the stop work order.
He emphasized that the lifting would not be based on a date, but would be based on completion of,procedure revisions and comple-tion of training on these new procedures.
Mr. A. F. Gibson stated that the TVA actions necessary to lift the stop work order were acceptable to the NRC as described.
He also stated that the NRC
Tennessee Val 1ey Authority would review these tests used to justify previous installations.
He thanked TVA for their presentation and closed the meeting.
Attachment Management Meeting Agenda
NRC / TYA CABLE PULLING MEETING JUNE 24, 1S86
MAJOR EVENTS t
CHRONOLOGICAL SEQUENCE REV 6 OF G38 REV 8 OF G40 SEPT 15, 85 OCT 10,86 SRN G386 TO G38 SRN G4010 TO G40 NOV 20, 85 NOV 20, 86 CAR WRITTEN DEC 17, 85 ENGINEERING MEMO WRITTEN JAN 15, 86 638 R7 8 G40 RS ISSUED JAN 15, 86 NRC INSPECTION REPORT JUN 16, 86 HOLD PUT ON CABLE PULLING JUN 17, 86 ENGINEERING MEMO APPLYING G38/40
~
NRC REVIEW MTG JUN 20, 86 JUN 24, 86
II
SITE MODIFICATIONS IMPACT BELLEFONTE 1 8 2 USING LATEST SPEC V/ATTS BAR 1 8 2 USING LATEST SPEC SEQUOYAH 1 & 2 USlNG LATEST SPEC B. F.
1 8 3 USING LATEST SPEC B. F. 2 PLANNED TO USE G 3/4 & G 38/40 UNTIL 6/17/86 8 TVA UNITS USING LATEST SPE BFNP RATIONALFOR USE OF G 3/4 DECISION MADE NOT TO IMPI EMENT ON B. F. BECAUSE:
1. IMPACT ON MODIFICATIONS5, 5 MAINTENANCENOT KNOV/N (ESPECIALLY CONDUIT)
2. NEEDED TO KNOV/ IF CONDUIT WOULD V/OULD MEET G38 INSTEAD OF G3 3. HAD TO KNOV/ IF MODIFICATIONSCOULD BE MADE IN ON GOING WORK 4. RISK KNOWN CABLES MAYHAVE TO BE REPULLED 5. CABLE VERIFICATION PROGRAMS WERE ALREADYUNDERWAY DECISION NOT AGRESSIYE
Yj
ACTIONS TAKEN SINCE JUN 17th QC INSURED NO CABLE INSTALLATION IN PROGRESS TELECON WITH REGIONAL OFFICE JUN 18th CABI E PULLING PUT ON HOLD JUN 18th QC PERFORMED HISTORICAI EVALUATION OF CABLE PULLING...
QC BEGAN WRITING QC INSTRUCTION TO ASSURE FUTURE INSTALLATIONSARE PER G 38t40 ISSUED MEMO REQUIRING G38/40 INITIATEDPERSONNEL, TRAINING8 PROCEDURE UPDATE BFNP NOV/ USING LATEST SPECS
BFNP CABLE INTEGRITYVERIFICATION PROGR MS PULLING TENSION/SIDE WALLPRESSURE
WATTS BAR CONFIGURATIONS RUNNING TESTS TO DETERMINE ALLOWABLES PRELIMINARYTESTS SHOW VALUES CONSERVATIVE BROWNS FERRY COMPARISONS WILLBE MADE ENVIRONMENTAI QUALIFICATIONOF CABLES OVER 300 CONTRACTS UNDER REVIEW 46 CABLE SAMPLES UNDER TEST OVER 50 CABLES WILLBE CHANGED OUT ELECTRICAL CALCULATIONS CABLE / BREAKER COORDINATION VOLTAGE DROP ANALYSIS BFNP COMPLETION FALL 86 AMPACITY 1E CABLE STUDY/CALCULATION ASSURE 1E CABLE CURRENT CAPACITY ADEQUATE REVIEW PROGRAM WITH NRR MAY6/7 STUDY COMPLETION FALL 86
CABLE INTEGRITYVERIFICATION PROGRAMS
'MPACITY PULLING TENSION/SIDE WALLPRESSURE
~ pg ELECTRICAL CALCS
SUMMARYCHART
.'FNP EARLIER DECISION NOT AGGRESSIVE G38/40 SPEC IMMEDIATEUSE WOULD HAVE BEEN MORE PRUDENT SHOULD HAVE PULLED CABLES USING NEW SPEC SHOULD HAVE UPDATED APPLICABLE PROCEBU RES SHOULD HAVE PERFORMED TRAININGAS NECESSARY
'FNP ACTIONS/STATUS MANAGMENTCHANGES MADE CABLE VERIFICATIONS UNDERWAY SIGNIFICANT PROBLEMS NOT BEING FOUND
'FNP NOW IN COMPLIANCE HAVE HOLD PUT ON CABLE PULLlNG USING G38/40 SPEC AS OF JUN 20
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