ML20210A731
| ML20210A731 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah  |
| Issue date: | 09/15/1986 |
| From: | Taylor J NRC OFFICE OF INSPECTION & ENFORCEMENT (IE) |
| To: | White S TENNESSEE VALLEY AUTHORITY |
| Shared Package | |
| ML20210A737 | List: |
| References | |
| NUDOCS 8609170325 | |
| Download: ML20210A731 (5) | |
See also: IR 05000327/1986038
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D. C. 20555
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SEP 15 W
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Mr. S. A. White
Manager of Nuclear Power
Tennessee Valley Authority
6N, 38A Lookout Place
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1101 Market Street
Chattanooga, TN 37402-2801
Dear Mr. White:
SUBJECT: REPORT NOS. 50-327/86-38 AND 50-328/86-38
On June 9'- 20, 1986, the NRC staff conducted a special inspection to examine
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the Design Baseline and Verification Program (DBVP), including independent
oversight by TVA Engineering Assurance, for the Sequoyah Nuclear Power Plant.
The NRC inspection comprised a multi-discipline team of personnel from the
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Office of Inspection and Enforcement, consultants, and the Region II Office.
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The team concentrated its inspection on (1) the overall DBVP plan and scope;
(2) the implementing procedures for both the project and the associated
independent Engineerin
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the walkdowns; and (4)g Assurance (EA) oversight;(3) conduct and results of
a preliminary assessment of the preparation of design
criteria.
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As a result of the inspection, the NRC team concluded that the preparations
and approach for the program were in most cases in accordance with the DBVP
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plan, subject to the items contained in the enclosed inspection report. These
items were provided to TVA in an exit meeting on June 20, 1986. We expect these
f tems will be addressed in your ongoing DBVP. We intend to review your actions
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in response to these items in future inspections.
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The following summarizes the major concerns identified by the inspection team
with respect to the DBVP.
(1) Several weaknesses in implementation of the DBVP were pointed out to TVA.
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Examples include:
Inconsistencies between Units' I and 2 walkdowns, stemming from
excessive latitude given to syst+ms engineers on attributes to be
included.
Lack of verification of portions of system drawings where portions of
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the system appeared on more than one drawing.
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Failure to document decisions regarding walkdown limits being
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less inclusive than program boundaries.
2
8609170325 860915
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ADOCK 05000327
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(2) The scope of the walkdowns does not include physical verification of
instrumentation and electrical aspects, such as conformance of system
functionality to single-line diagrams, cable separation, etc. TVA intends to
assess the adequacy of these aspects by review of test or surveillance
documentation or other controlled documentation which is available. The
rationale to support TVA's position needs to be documented.
(3) TVA is developing procedures and criteria as the program progresses, which
may result in accommodation of the procedures to the actual work performed.
(4) The Engineering Assurance (EA) group's review of the DBVP lacks guidance in
determining which review products should be sampled.
The EA review should
be focused towards (1) dominant safety systems, (2) complex Engineering
Change Notices (ECNs), and (3) areas where there is a known history of
industry problems.
TVA has decided' that the scope of the DBVP required to be completed prior to
restart will include those systems, or portions of systems, needed to mitigate
those accidents described in FSAR Chapter 15 or needed to achieve safe shutdown.
Although the team identified several specific comments relating to the program's
scope, the adequacy-of the program's scope is still undergoing staff review.
This letter also documents (report attachment B) several meetings which were
held prior to the inspection during which TVA discussed the DBVP in general
and information necessary for inspection planning was obtained.
In accordance with 10 CFR 2.790(a), a copy of this letter and the enclosure
will be placed in the NRC Public Document Room.
Should you have any questions concerning this inspection, please contact me or
Mr. Gene Imbro (301-492-9671) of this office.
Sincerely,
J es M. Tay1
, D rector
ffice of In ection and Enforcement
Enclosure:
Inspection Report 50-327/86-38 and 50-328/86-38
cc w/ enclosure: See next page
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Mr. S. A. White
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Cc:
Herbert S. Sanger, Jr. , Esq.
Tennessee Department of Public Health
General Counsel
ATTN: Director, Bureau of Environmental
Tennessee Valley Authority
Health Services
400 West Summit Hill Drive, E 118 33
Cordell Hull Building
Knoxville, TN 37902
Nashville, TN 37219
Mr. K. W. Whitt
Mr. Michael H. Mobley, Director
' Tennessee Valley Authority
Division of Radiological Health
400 West Summit Hill Drive, E3A8
T.E.R.R.A. Building
Knoxville,'TN 37902
150 9th Avenue North
Nashville, TN 37203
Mr. Bob Faas
Westinghouse Electric Corp.
County Judge
P.O.. Box 355
Hamilton County Courthouse
Pittsburgh, PA 15230
Chattanooga, TN 37402
Mr. Jerry Wills
Tennessee, Valley Authority
SN 133 Lookout Place
Chattenooga, TN 37402-2801
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,
Mr. Donald L. Williams, Jr.
Tennessee Valley Authority
400 West Summit Hill Drive, W10885
Knoxville,.TN 37902
,
Resident Inspector /Sequoyah NPS
c/o U.S. Nuclear' Regulatory Commission
2600 Igou Ferry Road
Soddy Daisy,.TN 37379
Regiorial Administrator, Region II
U.S. Nuclear Regulatory Commission
101 Marietta Street, N.W., Suite 2900
Atlanta, GA 30323
Mr. Everett Whitaker
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Tennessee Valley Authority
SN 1288 Lookout Place
Chattanooga, TN 37402-2801
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Mr. S. A. Whit:J
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Distribution:
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DQAVT Reading
QAB Reading
RArchitzel, IE
RLSpessard, IE
EVImbro, IE
GTAnkrum, IE
HMiller, IE
BKGrimes, IE
JMTaylor, IE
RStarostecki, IE
HRDenton, NRR
GZech, RII
BBHayes, 0I
SPWeiss, RII
SRConnelly, 0IA
ELJordan, IE
JYoungblood, NRR
HThompson, NRR
DMuller, NRR
Inspection Team (8)
ABelisle, RII
JHolonich, NRR
Resident Inspector
Regional Administrator, II
CRStahle, NRR
TMNovak, NRR
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Distribution:
LPDR
DQAVT Reading
QAB Reading
RArchitzel, IE
RLSpessard, IE
EVImbro, IE
GTAnkrum, IE
HMiller, IE
BKGrimes, IE
JMTaylor, IE
RStarostecki, IE
HRDenton, NRR
GZech, RII
BBHayes, 0I
SPWeiss, RII
SRConnelly, 0IA
ELJordan, IE
JYoungblood, NRR
HThompson, NRR
DMuller, NRR
Inspection Team (8)
-
ABelisle, RII
JHolonich, NRR
Resident Inspector
Regional Administrator, II
CRStable, NRR
TMNovak, NRR
ELD
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IE:DQAVT:QAB
IE:DQAVT:QAB:C
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GTAnkrum
HMiller
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- see previous for concurrence
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