ML20040D824
| ML20040D824 | |
| Person / Time | |
|---|---|
| Site: | Washington Public Power Supply System |
| Issue date: | 01/18/1982 |
| From: | Mazur D WASHINGTON PUBLIC POWER SUPPLY SYSTEM |
| To: | Faulkenberry R NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV) |
| References | |
| 10CFR-050.55E, 10CFR-50.55E, GO-1-82-0020, GO-1-82-20, NUDOCS 8202020289 | |
| Download: ML20040D824 (2) | |
Text
r e.
Docket Nos. 50 I60/513 t
50 55(e) Report Washington Public Power Supply System P.O. Box 968 3000 George Washington Way Richland, Washington 99352 (509)372-5000 m
M January 18, 1982 p.3 GO-1-82-Oo2o fx.
3
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R. H. Faulkenberry d.
g Nuclear Rugulatory Commision 2
T3 Region V 1450 Maria Lane, Suite 210 g
Walnut Creek, California 94596 4
Subj ect:
NUCLEAR PROJECTS 1 AND 4 POTENTIAL 10CFR50.55(e)
BUFFALO FORGE FAN HOUSING MISSILE PROTECTION
References:
1)
Telecon CR Edwards, Supply System to P. Narbut, Region V, Nuclear Regulatory Commission dated August 24, 1981 2)
.BFUE-81-5017, dated June 11, 1981, JA Cownie to DW Mazur 3)
UEWP-81-736, dated August 28, 1981, HC Grau to GK Dyekman 4)
G0-1-81-321, dated September 25, 1981 DW Mazur to RB Faulkenberry In reference (1) the Supply System informed your-office of a potentially reportable condition under 10CFR50.55(e).
In reference (2) the manuf acturer of the subject fans, Buff alo Forge Company, identified to the Supply System a design deficiency associated with the missile protection characteristics of the fans supplied to WNP-1/4 under the guidelines of 10CFR21.
In reference (4) the Supply System committed to making a determination _as to the reportability of this deficiency by January 15, 1982. As of this date we have not yet received all of the pertinent data to make that determination.
Based on current communications with Buffalo Forge and UE&C Engineering it is anticipated that all the _necessary information for making a determination will be available by April 1,1982, where by we will be able to provide a final report to your office by April 17, 1982.
D. W. Mazur Program Director, WNP-1/4
. UW4:MER:wp cc: CR Bryant, BPA/399 V. Stello, Director of Inspection and Enforcement lE O A. Toth, NRC YO?ohokfo 62 r
.e o
Y January 18, 1982 Go-1-82-0020 ATTACHMENT 1 Units WNP-1 and WNP-4 Docket Nos: 50-460 and 50-513 Potentially Reportable Condition 10CFR50.55(e)
Missile Penetration for Buff alo Forge Fans INTERIM REPORT
Background
Buff alo Forge Company, notified the Supply System on June 10, 1981 (Attachment
- 3) of a deficiency in the f an housing design in regard to missile penetration in that it did not conform to the specification requirements. The manufac-turer, Buffalo Forge Company, has report the apparent design deficiency to the NRC under the guidelines of 10CFR Part 21 (Attachment 3).
Description of Deficiency The failure of fan housing to stop missiles generated in the radial direction in the event of interior component failure, including wheel and motor, could damage some safety related (SRA) equipment, should the latter be near by and in the missile trajectory.
At the present time it is not known which of the fans are affected and whether they impact SRA equipment.
Status of Corrective Action On December 2 and 3, 1981 two Buffalo Forge Engineering representatives were at the WNP-1/4 jobsite to discuss the subject design deficiency.
Discussions were held with Supply System and UE&C Engineering for the purpose of determin-ing the best design fix. Rather than proposing one generic fix applicable to all fans, each of the fans were reviewed on a case by case basis to determine the best fix based on the f ans location within the plant. Although it has not been determined if any SRA equipment would be involved in a fan failure, the Project may consider plans to modify the f an shielding to protect the general safety of plant personnel.
Presently, Buff alo Forge Engineering is in the process of preparing drawings and other pertinent technical design documents which delineate what they feel is the most prudent course of action to correct the design deficiency. These documents will be reviewed by UE&C Engineering for technical adequacy and then forwarded to the Supply System Engineering for review and approval.
It is anticipated that UE&C's evaluation for critical f an location and the Buff alo Forge design fix will be completed by April 1,1982. A final report will then be prepared and issued by April 12, 1982.