L-75-004, NRC Bulletin 1975-004: Cable Fire at Browns Ferry Nuclear Power Station
| ML070220189 | |
| Person / Time | |
|---|---|
| Site: | Three Mile Island  |
| Issue date: | 03/25/1975 |
| From: | O'Reilly J P NRC Region 1 |
| To: | Miller J C Metropolitan Edison Co |
| References | |
| BL-75-004 NUDOCS 7904200039 | |
| Download: ML070220189 (2) | |
Text
UNITED STATES NUCLEAR REGULATORY COMMISSION RECION I 631 PARK AVCNUC KING OP POUSI¶A. PeI4NSYL.VANIqA 19406 March 25, 1975 Metropolitan Edison Company Attention:
Mr. J. C. Miller Vice President PO Box 542 Reading, Pennsylvania 19603 Docket No. 50-320 Enclosed is IS Bulletin No. 75-04 which is forwarded to you for information.
No action is required of you in response to this Bulletin.Should you have questions regarding this Bulletin, please contact this office.Sincerely,_James P. O'Reilly v-Director
Enclosure:
IE Bulletin No. 75-04 cc% R. L. Wayne, QA Manager, Design & Construction T. M. Crimmins, Jr., Safety & Licensing Manager R. W. Hevard, Jr., Project Manager W. A. Verrochi, Vice President, Design & Construction Gerald Charnoff, Esquire Mary V. Southard, Chairman, Citizens for a Safe Environment mm;ZFiles R Central Files DnR Local PDR RZC:Z Reading Room GCC State of Pennsylvania
---6-rA142OO0 4lAIqo da.Inspection and Enforcement bulletin No. 75-04 March 24, 1975 CABLE FIRE AT BROWNS FERRY NUCLEAR POWER STATION DESCRIPTION OF CIRCUMSTANCES:
Preliminary information from Tennessee Valley Authority regarding a fire which occurred on %arch 22, 1975, at their Browns Ferry site near Athens, Alabama, indicates that the fire was started as a result of construction activities.
The fire resulted in the shutdown of two operating nuclear plants and made several safety systems inoperative, including systems normally used for decay heat removal during shutdown.
The workmen were engaged in construction activities on a third unit not yet licensed for operation by NRC.Initial information indicates that during the installation and testing of cable through-wall penetrations an open flame ignited a flammable material used in the penetration seals.ACTIOH TO BE TAKEM BY LICENSEES:
The following actions are requested of selected Licensees with operating power reactor facilities and major construction activities at a common site: 1. Review your overall procedures and system for controlling construction activities that interface with reactor operac.ng activities, with particular attention to .the installation and testing of seals for electrical cables between compartments of the reactor building, e.g., control room to cable spreading room*2. Review the design of floor and wall penetration seals, "with particular attention to the fla.mability of materials.
- 3. Evaluate your procedures for the control of ignition sources which may be used for leak testing or other purposes in areas containing flammable materials.
.4. Report to this office, in writing within 20 days of the date of this Bulletin, the results of your reviews or evaluations regarding items 1 through 3 above.ACTIONS TO BE TAKEN BY LICENSEES M.AY BE REVISED: The actions requested o: Licensees above may I- revised as additional details of the Browns Feriy occurrence are available and evaluated by the NRC.