ML20209J449
| ML20209J449 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 02/03/1987 |
| From: | Taylor J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | White S TENNESSEE VALLEY AUTHORITY |
| Shared Package | |
| ML20209J455 | List: |
| References | |
| NUDOCS 8702060313 | |
| Download: ML20209J449 (6) | |
See also: IR 05000327/1986055
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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Mr. S. A. White
Manager of Nuclear Power
Tennessee Valley Authority
6N, 38A 1.ookout Place
1101 Market Street
Chattanooga, TN 37402-2801
Gentlemen:
SUBJECT: REPORT NOS. 50-327/86-55 AND 50-328/86-55
1-4, 1986, the NRC staff conducted a
On November 3-7 and 17-21, and December
specialinspectionofTVA'sDesignBaselineandVerificationProgram(DBVP)f
The NRC inspection was
the Sequoyah Nuclear Power Plant at the plant site.
comprised of a multi-discipline team of personnel from the Office of Inspecti
The team concentrated
and Enforcement, consultants, and the Region II Office.
nn the engineering change notices evaluated in the
oversight of this program by TVA's Engineering Assurance group.
As a result of the inspection, the NRC team concluded that the DBVP
conducted in accordance with the program plan.
project and Engineering Assurance groups appears to be adequate ir most
instances sanpled by the inspection team within the scope of the progran
areas inspected to date. Deficiencies have been noted, however.
Most significant
Results of the inspection are presented in the enclosure.
among the inspection team's observations regarding TVA's modification process,
which had not been identified by DVBP or EA efforts, are the following:
Instances of inadeounte drawing control, such as use of a Unit 1 piping
(1)
isometric for a Unit 2 alternate piping analysis of a nitrogen system
containment isolation valve configuration.
Instances of unconservative, missing or erronenus calculations, such es
(2)
an unconservative calculation to qualify a containment penetration test
line and incorrect analytical seismic qualification of a solenoid valve
87020bO313 870203
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Mr. S. A. White
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The NRC is
which operates a nitrogen system containment isola
components may be incorrect and incomplete.
Instances in which the Division of Nuclear Engine
(3)
Operations did not establish surveillance tests required to meet =some
test criteria.
An instance of a potential timing sequence problem in the d$sel
'
starting Ingic between load shedding and output breaker cicsure.
(4)
Instances of the DBVP project taking credit for the work of ot'ner TVA
programs for resolution of selected technical attributes without con-
,
(5)
firming that such attributes were properly addressed in thd other
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programs.
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Regarding these items, the team noted that the DBV
Based on comments developed by the DBVP project for
particular ECNs and other observations made by the team, the tec
modification tests.
catinn of test requirenents and test acceptance criteria between enginee
Engineer-
and plant operations personnel has not been sufficiently effective.
ing has not documented its understanding of the required scope o
tion tests, and Operations has not demonstrated its awareness of certain
periodic test and surveillance requirenents.
,,
We note that the DBVP is limited with respect to reviewing the technical
adequacy of calculations and that a separate calculation review program
The TVA caleplation review program, including a
discussion of its interface with the DBVP, was presented to the NRC a
being conducted by TVA.
TVA submitted a written description of the
15, 1986.
neeting held on December
70,1987 (Gridley to
calculation review prngram in a letter dated JanuaryOne aspect of
We
Youngblood). adequacy of calculations within all nuclear engineering div
intend to conduct an inspection of the calculational review program.
A written response is requested from TVA addressing the cbservation
The NPC intends to follow your acticut.to resolve
these items, therefore your response should be provided sufficiently in a
in the enclosed repnrt.
The
of planned restart of Sequoyah Unit 2 to allow for NRC inspection.
findings addressed in the enclosure were discussed by the team in a me
with TVA management at the conclusion of the inspection on December 4
In accordance with 10 CFR 2.790(a), a copy of this letter and the en
be placed in the NRC Public Document Room.
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Mr. S. A. White
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Should you have any questions concerning this inspection, please contact me or
Mr. Gene Imbro ((301) 492-9671) of this office.
Sincerely,
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ames M. Taylo
Director
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ffice of Ins ction and Enforcement
Enclosure:
Inspection Report 50-327/86-55
and 50-328/86-55
cc w/ enc 1:
See next page
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cc w/ encl:
Regional Administrator, Region II
Tennessee Department of Public
U.S. Nuclear Regulatory Commission,
Health
101 Marietta Street, N.W., Suite 2900
ATTN: Director, Bureau of
Environmental Health Services
Atlanta, Georgia 30323
Cordell Hull Building
Nashville, Tennessee 37219
J. A. Kirkebo
Mr. Michael H. Mobley, Director
ATTN:
D.L. Williams
Division of Radiological Health
Tennessee Valley Authority
400 West Summit Hill Drive, W12 A12
T.E.R.R.A. Building
Knoxville, Tennessee 37902
150 9th Avenue North
Nashville, Tennessee 37203
Mr. Bob Faas
Westinghouse Electric Corp.
County Judge
Hamilton County Courthouse
P.O. Box 355
Chattanooga, Tennessee 37402
Pittsburgh, Pennsylvania 15230
R. L. Gridley
Tennessee Valley Authority
SN 157B Lookout Place
Chattanooga, Tennessee 37402-2801
M. R. Harding
Tennessee Valley Authority
Sequoyah Nuclear Plant
P.O. Box 2000
Soddy Daisy, Tennessee 37379
Resident Inspector /Sequoyah NPS
c/o U.S. Nuclear Regulatory Commission
2600 Igou Ferry Road
Soddy Daisy, Tennessee 37379
H. L. Abercrombie
Tennessee Valley Authority
Sequoyah Nuclear Plant
P.O. Box 2000
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Soddy Daisy, Tennessee 37379
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