ML20151E594
| ML20151E594 | |
| Person / Time | |
|---|---|
| Site: | Callaway  |
| Issue date: | 07/13/1988 |
| From: | Shafer W NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III) |
| To: | Schnell D UNION ELECTRIC CO. |
| Shared Package | |
| ML20151E597 | List: |
| References | |
| NUDOCS 8807260133 | |
| Download: ML20151E594 (3) | |
See also: IR 05000483/1988009
Text
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JUL 131988
Docket No. 50-483
Union Electric Company
ATTN:
Mr. Donald F. Schnell
Vice President - Nuclear
Post Office Box 149 - Mail Code 400
St. Louis, MO 63166
Gentlemen:
This refers to the special safety inspection conducted by Mr. J. P. Patterson
and other representatives of the NRC on June 6-9, 1988, of activities at the
Callaway Nuclear Power Plant authorized by NRC Operating Licanse No. NPF-30
and to the discussion of our findings with Mr. M. Stiller and others of your
staff at the conclusion of the inspection.
The enclosed copy of our inspection report identifies areas examined during
the inspection. Within these areas, the inspection evasisted of a selective
examination of procedures and representative records, observations of Emergency
Response Facilities and related equipment, observation of the 1988 Emergency
Exercise and interviews with personnel.
No violations of NRC requirements were identified during the course of this
inspection.
However, there were areas identified requiring further review
and evaluation.
These items are identified as Open Items in the Appendix
to this letter, and are also described in the enclosed appraisal report.
In accordance with 10 CFR 2.790 of the Commission's regulations, a copy of
this le'.ter, the enclosures, and your response to this letter will be placed
in the NRC Public Document Room.
We will gladly discuss any questions you have concerning this inspection.
Sincerely,
w0riginal eftmod Fy T3. MfA"
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W. D. Shafer, Chief
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Radiological Protection Branch
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Enclosures:
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1.
Appenc'ix, Open Items
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2.
Inspection Report
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No. 50-483/88009(DRSS)
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JU L 131988
Distribution
cc w/ enclosures:
A. P. Neuhalfen, Manager Quality
Assurance
Tom P. Sharkey, Supervising
Engineer, Site Licensing
DCD/DCB (RIDS)
Licensing Fee Management Branch
Resident Inspector, RIII
Region IV
Resident Inspector, Wolf Creek
K. Drey
Chris R. Rogers, P.E.
Utility Division, Missouri
Public Service Commission
CFA, Inc.
Gerald Charnoff, Esq.
Thomas Baxter, Esq.
R. A. Kucera, Deputy Director,
Department of Natural Resources
W. Travers, EPB, NRR
R. Bissell, FEMA, RVII
,
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' APPENDIX
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APPRAISAL OPEN ITEMS
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1.
Open Item No. 50-483/88009-01:
Information on how the TSC ventilation
system was designed to operate could not be found.
There was no physical
indication or quantitative instrumentation available to determine if a
positive pressure is maintained in the TSC.
In reviewing conceptual
design documentation and shielding calculations, reference was made to
a pressurized ventilation system for_the TSC and the EOF.
Shielding
calculations for both the TSC and the EOF appear to have been made
assuming a pressurized and filtered ventilation system.
It could not be determined how much of a differential pressure should
exist between the inside and outside of the TSC.
When the system is
in emergency mode there is no evidece of a positive pressure in the
building when opening an outside door.
2.
Open Item No. 50-483/88009-02:
There was no physical indication or
>
quantitative instrumentation available to' determine if a positive pressure
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is maintained in the EOF,
Information in the FSAR merely stated that the
HVAC system for the EOF is similar to that of the TSC except the system
contained only a HEPA and no charcoal filters.
Charcoal filters are not
required because this EOF is within ten miles and has a backup EOF
(Reference NUREG-0737, Supplement No. 1). Oose calculations indicated that
the ventilation system in the filtration mode should operate with a
positive pressure.
There was no evidence of a positive pressure in the
building when opening an outside door.
Since the shielding calculations were performed assuming a pressurized
ventilation system, it cannot be verified that the EOF is capable of
providing the stated protection factor.
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