ML20215K779
| ML20215K779 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 06/16/1987 |
| From: | Zech G NRC OFFICE OF SPECIAL PROJECTS |
| To: | White S TENNESSEE VALLEY AUTHORITY |
| References | |
| REF-GTECI-A-46, REF-GTECI-SC, TASK-A-46, TASK-OR GL-87-02, GL-87-2, NUDOCS 8706250438 | |
| Download: ML20215K779 (2) | |
See also: IR 05000259/1986025
Text
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JUN 161987
Tpnnessee Valley Authority
LATTN: Mr. S. A. White
Manager of Nuclear Power
6N 38A Lookout Place
1101 Market Street
Chattunooga, TN 37402-2801
Gentlemen:
SUBJECT:
REPORT NOS. 50-259/86-25, 50-260/86-25, AND 50-296/86-25
Thank you for your supplemental response of March 2,1987, to our Notice of
Violation issued on September 11, 1986, concerning activities conducted at
your Browns Ferry facility.
The supplemental response was in reference to
violations concerning a blocked fire protection preaction sprinkler system and
the lack of documentation prescribing the anchoring details of the control
room emergency ventilation system (CREVS) filter blower assembly un'it (e.g,
violation items 2.a. and 2.c., respectively). We have evaluated your response
and found that violation item 2.a. meets the requirements of 10 CFR 2.201. We
will examine the implementation of your corrective actions during future
inspections.
With regard to violation 2.c., we are not fully satisfied with your supplemen-
tal response.
In our judgement, there still appears to be a question regard-
ing the adequacy of the anchorage for the train B CREVS filter / blower assembly
that needs to be resolved prior to Unit 2 restart. We consider this particular
item to be an outlier to the USI A-46 program. The equipment anchorage guide-
lines per the USI A-46 program have not been fully developed as you have stated
and thus they cannot be used to qualify the existing train B CREVS unit instal-
lation for seismic acceptability.
Finally, while we recognize the appropri-
ateness of including the Browns Ferry facility under the review of Generic
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Letter 87-02, " Verification of Seismic Adequacy of Mechanical and Electrical
Equipment in Operating Reactors, USI A-46", we think the mounting of equipment
that may be outliers such as the subject CREVS unit, should be reviewed more
quickly once the problem is identified. Therefore, we request that you provide
us an analysis that demonstrates the adequacy of the existing train B CREVS
filter / blower assembly mounting or propose and implement an acceptable anchor-
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age modification if it becomes necessary to meet the seismic requirements.
Your response to this item is requested within 60 days of this letter date.
This is a Unit 2 restart item.
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Tennessee Valley Authority
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We appreciate your cooperation in this matter.
Sincerely,
Gary G. Zech, Assistant Director,
Inspection Programs
Division of TVA Projects
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Office of Special Projects
cc: tlk P. Pomrehn, Site Director
Browns Ferry Nuclear Plant
J<L.Gridley, Director
Juclear Safety and Licensing
L4. A. Kirkebo, Director
pelearEngineering
N. J, May, Site Licensing Manager
bec: O/G. Keppler, OSP
D. Ebneter, OSP
M[. A. Zwolinski, OSP
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D. Liaw, OSP
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D. Richardson, OSP
(ST R. Connelly, OIA
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K. P. Barr, OSP/RII
LNKC Resident Inspector
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NRC Document control Desk
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State of Alabama
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