ML20245F275
| ML20245F275 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 04/24/1989 |
| From: | Daniels T Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| GL-88-01, GL-88-1, NUDOCS 8905020317 | |
| Download: ML20245F275 (11) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION c
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WASHINGTON, D. C. 20666 April 24, 1989 c.
"'i Docket No. 50-26 LICENSEE: Tennessee Valley Authority FACILITY: Browns Ferry Nuclear Plant, Unit 2
SUBJECT:
SUMMARY
OF MEETING WITH TENNESSEE VALLEY AUTHORITY (TVA) HELD ON APRIL 20, 1989 TO DISCUSS GENERIC LETTER 88-01 RESPONSE FOR REACTOR WATER CLEANUP (RWCU) SYSTEM PIPING OUTSIDE THE DRYWELL PENETRATIONS On April 20, 1989, the NRC staff met with Tennessee Valley Authority (TVA or licensee) at the NRC offices in Rockville, Maryland to discuss what actions TVA plans to implement for the reactor water cleanup (RWCU) system stainless steel piping greater than or equal to four inches in diameter in response to Generic Letter (GL) 88-01, IGSCC in BWR Austenitic Stainless Steel Piping. lists the meeting participants. Enclosure 2 contains the slides ;
used in the licensee presentation.
TVA presented an increased scope for the RWCU system that will include 77 welus. These welds will be classified as Category G, in accordance with Table 1 of GL 88-01,'and completely replaced during the next refueling outage (Cycle 6 outage) after the present shutdown.
For Units 1 and 3 the RWCU piping within the scope of GL 88-01 will be replaced prior to startup.
TVA stated that the RWCU piping was nonsafety-related and isolable, the containment isolation valves are leak tested prior to startup, the isolation valves have a good performance history and very low leakage during testing.
There is a pipe break detection system installed, isolation valves close within 30 seconds and the closure response time is tested, therefore, the issue is not a safety-related issue.
After some discussions between the NRC staff and TVA the following comitments were made by TVA:
1.
The stainle'ss steel piping in the RWCU System greater than or equal to four inches will be replaced in entirety during the next refueling outage (Cycle 6 outage).
2.
RWCU isolation valves will be leak tested prior to startup in accordance with Technical Specification 4.7.A.2.g(3).
3.
RWCU isolation valves will be closure response tested in accordance with Technical Specification 4.7.D.1.a.
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This commitment will be made in response to unresolved item, 50-259/260/296/
89-05-01 in Inspection Report Number 50-259/260/296/89-05.
l The NRC staff stated that it would review TVA's response to the unresolved-item and at this time the staff does not have any concerns,in relation to the commitments made by TVA to resolve the issue.
The NRC staff review of TVA's response will be the subject of a separate
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letter.
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- rom Daniels, Project Manager 1
TVA Projects Division Office of Nuclear Reactor Regulation
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Enclosures:
1.
Attendance List 2.
TVA Viewgraphs cc w/ enclosures:
See next page Distribution Docket File NRC PDR Local PDR Those on Attached List
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General Counsel Regional Administrator, Region II-Tennessee Valley Authority U.S. Nuclear Regulatory Commission l
400 West Summit Hill Drive 101 Marietta Street, N.W.
i E11 B33 Atlanta, Georgia 30323 Knoxville, Tennessee 37902 Resident Inspector / Browns Ferry NP Mr. C. H. Fox U.S. Nuclear Regulatory Commission j
Tennessee Valley Authority Route 12, Box 637 l
SN 1578 Lookout Place Athens, Alabama 35611 Chattanooga, Tennessee 37402-2801 l
Mr. O. J. Zeringue Dr. Henry Myers, Science Advisor Tennessee Valley Authority Committee on Interior Browns Ferry Nuclear Plant and Insular Affairs P.O. Box 2000 U. S. House of Representatives i
Decatur, Alabama 35602 Washington, D.C.
20515 1
Tennessee Valley Authority l
Mr. P. Carier Rockville Office 1
l Tennessee Valley Authority 11921 Rockville Pike l
l Browns Ferry Nuclear Plant Suite 402 20852 P.O. Box 2000 Rockville, Maryland Decatur, Alabama 35602 Mr. Oliver D. Kingsley, Jr.
Mr. D. L. Williams Senior Vice President, Nuclear Power Tennessee Valley Authority Tennessee Valley Authority l
400 West Summit Hill Drive 6N 38A Lookout Place W10 885 1101 Market Street Knoxville, Tennessee 37902 Chattanooga, Tennessee 37402-2801 Chairman, Limestone County Commission P.O. Box 188 Athens, Alabama 35611 Claude Earl Fox, M.D.
State Health Officer State Department of Public Health State Office Building Montgomery, Alabama 36130 1
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C-ENCLOSURE 1 I
ATTENDANCE LIST APRIL 20, 1989 MEETING i
Name Affiliation Raymind Boyd TVA i
Clifford Eubanks TVA l
Mike Hellums TVA l
.Ed Hartwig TVA Suzanne Black NRC Robert Pierson NRC David Terao NRC David Smith NRC Tom Daniels NRC
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ENCLOSURE 2 1
4 REASED SCOPE OF 88-01 1
88-01 APPLIES TO t-stainless steel
- piping,
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Rx Coo 1 ant,>2OOoF, Power Operation i
Regardless of Code Class l
PREVIOUS SUBMITTAL DID NOT INCLUDE WELDS W I TI-I NONCODE CLASS DESIGNATION I
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l di IRCREASED SCOPE OF 88-01
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1 1
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UNIT-2 PIPING OUTSIDE OF DRYWELL RWCU 77 WELDS i
4 PLANNED ACTION s
INCLUDE THESE WELDMENTS IN A
5 I
REVISED 88-01
RESPONSE
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l FOR UNIT-2 l,
CLASSIFY AS CATEGORY G
SCHEDULE REPLACEMENT DURING THE j
CYCLE 6
OUTAGE k
1 i
FOR UNITS 1
3 i
1 SCHEDULE REPLACEMENT PRIOR TO STARTUP
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INCREASED SCOPE OF 88-01 i
BASES FOR APPROACH l
1 1
COMPLIES WITH GUIDANCE OF 88-01 l
NOT A
SAFETY RELATED ISSUE l
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RELIABILITY ISSUE b
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EJFCREASED SCOPE OF 88-O1
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NOT A
SAFETY RELATED ISSUE...
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1 RWCU PIPING NONSAFETY RELATED ISOLABLE l
VALVES LEAK TESTED PRIOR TO STARTUP
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f ISOLATION VALVES GOOD h
PERFORMERS
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1 PIPE BREAK DETECTION SYSTEM
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INSTALLED
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l ISOLATION VALVE CLOSESURE WITHIN 30 SECONDS CLOSURE
RESPONSE
TESTED PER SI 4.7.D.1.a-1 EQ PROGRAM EQUIPMENT QUALIFIED FOR RWCU PIPE. BREAK a
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CREASED SCOPE OF 88-01 1
1 RELIABILITY ISSUE I
RWCU PIPE LEAKAGE HAS NOT BEEN A
MAJOR PROBLEM AT BFNP OR WITHIN THE INDUSTRY BFNP HAS NOT EXPERIENCED
{
RWCU PIPE LEAKAGE FROM IGSCC$
OTHER UNITS WITH MORE 1
OPERATING TIME WITHOUT LEAKS EQUATES TO
-LOW PROBABILITY-OF LEAKAGE OVER THE NEXT OPERATING CYCLE FOR UNIT-2
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REASED SCOPE OF 88-O1
SUMMARY
FOR UNIT-2 INCLUDE UNIT-2 RWCU WELDMENTS IN A
REVISED 88-01
RESPONSE
CATEGORY G
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SCHEDULE REPLACEMENT DURING THE CYCLE 6
OUTAGE FOR UNITS 1
3 INCLUDE RWCU WELDMENTS IN REVISED 88-O1
RESPONSE
SCYEDULE REPLACEMENT PRIOR TCCRESTART l
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Meeting Summa Memoranda for Trip Reports or Site Visits ~ dated April 24, 1989 7 Docket File:
^
NRC PDR" Local PDR Projects Reading l
ADSP Reading J. Sniezek D. Crutchfield B. D. Liaw S. Black R. Pierson T. Daniels G. Gears i
D. Moran N. Markisohn M. Sinus B. Wilson, Region II i
W. S. Little OGC D. Terao s
D. Smith ACRS (10)
GPA/CA (M. Callahan) (f.)
E. Jordan B. Grimes t
P. Gwynn J. Scarborough G. Marcus L. Norrholm C. Ader i
J. Gray R. Borchardt BFN Rdg. File
- cc:
Licensee / Applicant & Service List l
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