ML20211H266
| ML20211H266 | |
| Person / Time | |
|---|---|
| Site: | Beaver Valley |
| Issue date: | 08/08/1986 |
| From: | Carey J DUQUESNE LIGHT CO. |
| To: | Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I) |
| References | |
| 2NRC-6-082, 2NRC-6-82, 86-10, NUDOCS 8611050050 | |
| Download: ML20211H266 (4) | |
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$VL 2NRC-6-082 August 8, 1986 M
Beever Valley No. 2 Unit Project Organization Telecopy ( 2 64 Ext.160 S.E.G. Building P.O. Box 328 Shippingport, PA 15077 United States Nuclear Regulatory Commission Region I 631 Park Avenue King of Prussia, PA 19406 ATTENTION:
Dr. Thomas E. Murley Administrator
SUBJECT:
Beaver Valley Power Station - Unit No. 2 Docket No. 50-412 American Warming and Ventilating, Inc., Fire Dampers Potential Significant Deficiency Report 86-10 Gentlemen:
Th'is Potentially Reportable Significant-Deficiency Report is being submitted pursuant to the requirements of 10CFR50.55(e).
It is anticipated that no additional reports will be required.
DUQUESNE LIGHT COMPANY By b
J. J. Carey
[f Vice President LMR/ijr Attachment AR/NAR cc:
Mr. P. Tam, Project Manager (w/a)
Mr. J. M. Taylor, Director (3) (w/a)
Mr. W. Troskoski, Sr. Resident Inspector (w/a)
Mr. L. Prividy, NRC Resident Inspector (w/a)
INP0 Records Center (w/a)
NRC Document Control Desk (w/a) 8611050050 860808
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,e United States Nuclear Regulatory Commission Dr. Thomas E. Murley' American Warming and Ventilating, Inc., Fire Dampers Potential Significant Deficiency Report 86-10 l
~Page 2 LMR/ijr NR/ SIGN /DEF/RPT bcc:
J. J. Carey
- w/ attachment C. E.. Ewing
- w/ attachment T. P. Noonan
- w/ attachment J. A. Hultz~
- w/ attachment J. P. Thomas.
- w/ attachment l
R._Coupland
- w/ attachment
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- w/ attachment C. 0. Richardson, SWEC (5)(3)
A. A. Dasenbrock, SWEC
- w/ attachment R. Anstey, SWEC
- w/ attachment R. Wittschen, SWEC
- w/ attachment J. Sutton, SWEC
- w/ attachment J. M. Grigsby (W_)
- w/ attachment BV-2-NCD-SEG/ Phase II I
PJC Audit Distribution l
i SDR 86-10 (4)
- w/ attachment I
NCD File
- w/ attachment SDR 86-10
- w/ attachment 1
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ATTACHMENT 1.
Summary During HVAC system testing, two (2) American Wanning and Ventilating, Inc.
non-safety related, horizontally-mounted. fire dampers were noted not to close fully after the fusible link had been removed.
Missing springs on the bottom blade (s) were identified as the cause for the incomplete closure.
The design of the tie rod precluded the installation of the spring.
Further investigation revealed the potential for this problem existed on twenty-two (22) safety related, horizontally - mounted upflow fire dampers:
twenty (20) installed and two (2) yet to be installed.
2.
Immediate Action Taken Nonconformance and Disposition Reports were issued for the identified fire dampers in various HVAC Systems.
Mr.
R.
J.
Wallauer, Lead Compliance Engineer - Beaver Valley Unit 2, notified Mr. E. Weinzinger, NRC Region I of this concern on July 9,1986.
3.
Description of Deficiency Twenty-two.(22) QA Category I horizontally-mounted fire dampers (in vertical ductwork) with up flow conditions have been identified as missing the spring on the bottom blade (s).
The lack of positive latching of the fire -damper results in the incomplete closure of the fire damper when actuated by fusible link removal.
4.
Analysis of Safety Implication Failure of the fire dampers to completely close could allow fire to penetrate adjacent fire zones and adversely impact redundant safety related equipment.
5.
Corrective Action to Restore Deficiency American Wanning. and Ventilating,
- nc.
has provided a recommended corrective action to return the affected fire dampers to their design specification.
The corrective action entails adding a heavier spring to one of the upper blades of the fire damper, thus deleting the requirement for the spring on the bottom blade.
The vendor has committed to provide revised damper drawings, revised operation manuals and a revised ~ seismic analysis report.
This spring will give the fire damper the positive closure required to fully close the fire damper upon removal of the fusible iink, thus ensuring separation of adjacent fire zones in the event of a fire.
6.
Additional Report No additional reports are expected.
.