ML20217A605
| ML20217A605 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 11/09/1990 |
| From: | Ebneter S NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| To: | Kingsley O TENNESSEE VALLEY AUTHORITY |
| Shared Package | |
| ML20217A609 | List: |
| References | |
| NUDOCS 9011210185 | |
| Download: ML20217A605 (4) | |
See also: IR 05000327/1990036
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November 9, 1990
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D0cket Nos. 50-327, 50-328-
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Mr. Oliver D. Kingsley, Jr.
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Senior Vice President, Nuclear Power
Tennessee Valley Authority
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6N 38A Lookout Place
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1101 Market Street
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Chattanooga, TN 37402-2801
Dear Mr.~Kingsley:
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SUBJECT: AUGMENTED INSPECTION TEAM. REPORT NOS. 50-327/90-36 AND 50-328/90-36
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This' refers to-the special inspection conducted by the NRC Augumented Inspec-
. tion Team (AIT) at your Sequoyah facility during the period October 11-19,
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1990.
The inspection included a review of events- that led to the discovery of
multiple failures of ' Main' Steam Check Valves .on October 8,1990.
At the
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. conclusion of the, inspection,-the. findings were discussed with those members.of'
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'your staff identified in the enclosed' inspection report.
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The AIT concluded that the multiple failures were the result of inadequate
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> recognition ' and correction ,of deficiencies in the original design and
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inadequate analysis of.a recent design modification.. The recent design change
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was: concluded to' be the principal contributor to the rapid progression of valve -
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failures;
Excessive reliance, appeared to be placed -on vendor concurrence
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rather than detailed design evaluation of the change.
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LThe enclosed' copy of the AIT~ report identifies the areas examined during this
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- inspection. - . Within these areas, the inspection ' consisted -.of selective
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examinations of . procedures . and representative records, interviews with
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personnel and observation of: activities in progress.
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In accordance with Section 2.790 of the NRC's " Rules of Practice", Part 2,
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Title 10,iCode of Federal Regulations, a copy of this letter and its enclosure
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-.will be placed in the NRC Public Document Room..
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sWi appreciate your cooperation during our team inspection and subsequent
evaluation of this event.
- Your open discussion of your findings. and
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evaluations was very beneficial.
9011210185 901109
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DR
ADOCK 05000327
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Mr. Oliver D. Kingsley, Jr.
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November 9, 1990
Should you have any questions concerning this letter, please contact us.
Sincerely,
Original signed by
EllisrW. Merschoff
Stewart D. Ebneter
Regional Administrator
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Enclosure:
LAIT Report-
cc w/ encl:
M. Runyon, Thairman
Tennessee Valley Authority
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ET 12A 7A
.400 West Summit' Hill Drive
Knoxville,'TN 37902
J..B. Waters'. Director-
Tennessee. Valley Authcrity
ET:12A 9A
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400 West Summit Hill Drive
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Knoxville, TN 37902
W. F. Willis-
Chief Operating Officer
.ET 128 16B.
'400 West Summit Hill Drive
Knoxville,iTN. 37902
-D. Nunn,'Vice President
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Nuclear Engineering _
Tennessee Valley Authority
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400 West Summit Hill Drive
WT 12A:12A
Knoxville,-TN 37902-
Dr. M. O. Medford
Vice President and Nuclear
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Technical Director
Tennessee Valley Authority
6N 38A !cokout P1 ace
Chattanooga, TN 37402-2801
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(cc.w/er.cl cont'd - see page 3)
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Mr. Oliver D. Kingsley, Jr.
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November 9, 1990
(cc w/ enc 1 cont'd)
County Judge
Hamilton County Courthouse
Chattanooga, TN 37402
Dr. Henry Myers Science Advisor
Comiittee on Interior and
Insular Affairs
V. S. House of Representatives
Washington, D. C.
20515
C. A. Vondra, Plant Manager
Sequoyah Nuclear Plant
Tennessee Valley Authority
P. O. Box 2000
Soddy-Daisy, TN 37379
E. G. Wallace Manager
Nuclear Licensing and
Regulatory Affairs
Tennessee Valley Authority
SN 1578 Lookout Place
Chattanooga, TN 37402-2801
M. Burzjnski
Site Licensing Manager
Sequoyah Nuclear Plant
P. O. Box 2000
Soddy-Daisy, IN 37379
TVA Representative
Rockville Office
11921 Rockville Pike
Suite 402
Rockville, MD 20852
General Counrel
Tennessee Valley Authority
400 West Sumiit Hill Drive
ET llB 33H
Knoxville, TN 37902
Michael H tiobley, Director
Division cf Radiological Health
T.E.R.R.A. Building
150 -9th Avenue North
Nashville, TN 37247-3201
State of Tennessee
(bec w/enci - see page 4)
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Mr. Oliver D. Kingsley, Jr.
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November 9, 1990
bec w/ enc 1:
S. D. Ebneter RIl
S. C. Black, NRR
B. A. Wilson, TVAP/Ril
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W. S. Little, TVAP/RIl
J. D. Brady, TVAP/Ril
J. Rutberg, OGC
G. C. Lainas, NRR
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F. J. Hebdon, NRR
J. N. Donchew, NRR
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NRC Document Control Desk
DRP Section Chief
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NRC Resident inspector
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U.S. Nuclear Regulatory Commission
2600 Igou Ferry
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Soddy-Daisy, TN 37379
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