ML18033B101
| ML18033B101 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 12/22/1989 |
| From: | Gears G Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| TAC-00421, TAC-421, NUDOCS 9001030159 | |
| Download: ML18033B101 (21) | |
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Docket No. 50-260 UNITEDSTATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 December 22, 1989 LICENSEE:
Tennessee Valley Authority FACILITY:
Browns Ferry Nuclear Plant, Unit 2
SUBJECT:
SUMMARY
OF MEETING WITH TENNESSEE VALLEY AUTHORITY (TVA) HELD ON DECEMBER 18$
1989 TO DISCUSS THE BROWNS FERRY NUCLEAR PLANT, UNIT 2, CABLE INSTALLATION PROGRAM (TAC 00421)
On December 18, 1989, the NRC staff met with the Tennessee Valley Authority (TVA or the licensee) at the NRC offices at Rockville, Maryland to discuss TVA's cable installation issues for Browns Ferry Nuclear Plant (BFN), Unit 2.
A list of attendees is attached as Enclosure l.
Enclosure 2 provides TVA's handout from its discussion of the resolution of cable installation issues at BFN.
TVA provided a review of the status and scope of the cable installation resolu--
tion program at Browns as outlined in its three submittals dated July 18,
- 1988, September 29, 1988 and June 19, 1989.
The intent of the meeting was to discuss recent cable damage discoveries at the Watts Bar site and their effect on pro-posed resolution of this issue at Browns Ferry.
TVA proposed a revised approach to issue resolution not previously provided the staff in the above cited submittals.
The proposed approach'is outlined in the attached enclosure and includes selective testing together with analyses using revised acceptance criteria.
The staff provided the following specific comments on TVA's proposed action:
1.
"Hi-Pot (Ory) Testing" - Proposed voltage should bound those previously used by TVA.
2.
TVA will need to sufficiently justify the use of "Hi-Pot" testing based upon their prior submittals on this subject.
Also, the staff indicated that the dry testing results most likely would not provide adequate justification on the acceptability of cables and that wet testing would be more appropriate.
3.
A polarization index must be included in the "Hi-Pot" testing accept-ance criteria.
4 ~
TVA needs to provide a strong basis for its assumption that all threshold values for conduit-fill, conduit length, number of pull-bys and number of cables pulled must be exceeded before it is assumed that calculated sidewall pressures would exceed allowable values.
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'6.
TVA needs to determine, based upon Item 4 above, whether )ts Sgquoyah analyses are still bounding based upon the Watts Bar endings.
TVA also needs to document their bases for selecting only cables in three conduits for testing under this program as opposed to fifteen tested previously under the Sequoyah program.
TYA indicated that it would take the above comments into consideration and that a subsequent meeting or telephone conference call would most likely be needed to provide the staff with status of resolving these concerns.
Enclosures:
1.
Attendance List 2.
TVA Handout Original signed by Gerald E. Gears, Project Hanager TYA Projects Division Office of Nuclear Reactor Regulation cc w/enclosures:
See next page OFC
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- 12/a+89:1 ~8 Document Name:
l'1EETING SUNNARY 12/18
cco General Counsel Tennessee Valley Authority 400 West Summit Hill Drive ET llB 33H Knoxvi 1 le, Tennessee 37902 Mr. F. L. Moreadith Vice President, Nuclear Engineering Tennessee Valley Author ity 400 West Summit Hill Drive WY 12A 12A Knoxville, Tennessee 37902 Or. Mark 0. Medford Vice President and Nuclear Technical Director Tennessee Valley Authority 6N 38A Lookout Place Chattanooga, Tennessee 37402-2801
- Manager, Nuclear Licensing-and Regulatory Affairs Tennessee Valley Authority 5N 157B Lookout Place Chattanooga, Tennessee 37402-2801 Mr. 0. J. Zeringue Site Director Browns Ferry Nuclear Plant Tennessee Valley Authority P. 0.
Box 2000
- Decatur, Alabama 35602 Mr. P. Carier Site Licensing Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P. 0.
Box 2000
- Decatur, Alabama 35602 Mr. G. Campbell Plant Manager Browns Ferry Nuclear Plant Tennessee Valley Authority P. 0.
Box 2000
- Decatur, Alabama 35602
- Chairman, Limestone County Comission P. 0.
Box lSS
- Athens, Alabama 35611 Claude Earl Fox, M.D.
State Health Officer State Department of Public Health State Office Building Montgomery, Alabama 36130 Regional Administrator, Region II U.S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Atlanta, Georgia 30323 Mr. Danny Carpenter Senior Resident Inspector Browns Ferry Nuclear Plant U.S. Nuclear Regulatory Commission Route 12, Box 637
- Athens, Alabama 35611 Or. Henry Myers, Science Advisor Comnittee on Interior and Insular Affairs U.S.
House of Representatives Washington, D.C.
20515 Tennessee Valley Authority Rockvi lie Office 11921 Rockvil le Pike Suite 402 Rockville, Maryland 20852 Mr. Oliver D, Kingsley, Jr.
Senior Vice President,.Nuclear Power Tennessee Valley Authority 6N 38A Lookout Place 1101 Market Street Chattanooga, Tennessee 37402-2801
ENCLOSURE 1
ATTENDANCE LIST Name T. Ippolito J. HcCarthy P. Carier H. Lleber H. Hedford M. S. Little J.
Rinne J.
A. Krieg R. Luther K. Brown A. Harinos H. Garg G. Gears R. Pierson B. D. Liaw J.
Hutson Or anization TVA TVA, BFN TVA BFN TVA BFN TVA NRC, RII TVA, BFN TVA, BFN TVA TVA NRC NRC NRC NRC
. NRC TVA TVA = Tennessee Valley Authority BFN
= Browns Ferry Nuclear Plant
ENCLOSURE 2
INTRODUCTION JOE Mt CARQiY LICENSING ISSUE
SUMMARY
VOLUME 3 NUC&'AR PEB1!OHMANCE PLAN SUBÃIVZALS BFN CABLE INSTALLATIONREPORT SUPPLEMENTAL INFORMATION JULY 18, 1988 SEPT2ÃBER 29, 1988 HEVISED CABLE INSTALLATION SUN%RY JUNE 19, 1989
'I SEPTEMBER 5, 1989 MEZlTINt AT BFN ON EUHCTRICAL ISSUES
BMNNS FERRY NUCIZAR PIPPIN o
POST-WBN RESOLm.'ION PITONS PULI -BYS
PURPOSE o
CONFIBN ORIGINM PULL-BY ANALYSIS o
RESOLVE COAX JACKET DAMAGE ISSUE
ORIGINAL BFH PULL-BY CRITERIA o
15 OR MORE CABLES o
'BA OR MORE ENGINEERING CHANGE NUECES o
COHDUIT LE%TH o
IDEMl'IFY AND VISUALLY INSPECT 15 NORST-CASE CONDUITS
BACKGROUND o
SQN SUCCESSFULLY HI-PCS APPROXIMATELY lg000 CGNDUCIQRS o
BFN EVALUATIONVS.
SQN I'STERIALS 0
'INSTALLATION SPECIFICATIONS PRACTICE I
EVALUATIONCONCLUDED THAT BFN WAS BOUNDED BY SQN
PULK-BY CONFIRMMION EFFORT o
fH-HE NORST 3 %) CGNFIBN INITIM CONCLUSIONS (i.e.,
EXCZao ALuaearZ am) o REMAINING POPULATION IDENTIFY/ANMYZE 30 N3RST-CASE CONDUITS
HI-POP TEST o
TYPE OF TEST HI-evr 5.4 m 7.2kV DC 15 TO 28 X SERVICE VOLTAGE DRY/CONDUCTOR-KH ONDUClQR o
ACCEPTANCE CRITERIA FIVE-MINtEE WITHSTAND
MODIFIED CRITERIA o
APPROACH BHQUIRED H3R UNIT 2 RESTART 15 OR MORE CABLES (Vl-V3) 4 OR MORE CABLES (V4)
CONDUIT LENt 1'H GREATER THAN 20 FEEZ liIGH FILL PRESENCE OF PULL-BYS 1
WAf KDONN TOP 30 CMCUMIE SNP o
ACCEPTANCE CRITERIA SWP LESS THAN THREE TESTED
COAX JACKET DAMAGE o
VC) WBN COAX FOUND WITH UNACCEPTABLE JACKET MMAGE 0
NICKS/SCRAPES FROM NORMAL INSTALLATIONPROCESS o
REPLACE HXJR 10 CFR 50.49 COAX REQUIRED FOR U2 REGULA.RT o
REPLACEMENT/NEW CABLES TO BE DOUBLE-JACKETE33
CONCLUSION I
o EVALUATED MECHANISMS PULL -BYS NICKS/SCRAPES (COAX) o PULL-BYS RANK/ANALYZENORST-CASE CONDUITS HI-mr TmmE ERST-CASe aaCm INITIALASSESSmer o
COAX REPLACE BBQUIRED CABLES NI'Qi DOUBLE-JACKETED CONSTRUCTION I
o PULL-BY AND COAX DQMGE ISSUES RESOLVED
Meetin Summar Memoranda for Tri Re orts or Site Visits**
Sniezek D. Crutchfield T. Quay B.
D. Liaw S. Black R. Pierson LA G. Gears D. Moran B. Wilson, Region II W. S. Little, Region II OGC A. Marinos H. Garg ACRS (10)
GPA/CA (M. Callahan)
(3)
- f. Jordan B. Grimes J.
Scarborough G. Marcus L. Norrholm C. Ader J.
Gray R. Borchardt 12-G-18 MNBB-3302 9-A-2 9-H-3 16-H-3'6-G-15 16-H-3 16-H-3 17-G-13
- cc:
Licensee/Applicant I5 Service List