ML20099C084
| ML20099C084 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom, Limerick  |
| Issue date: | 07/24/1992 |
| From: | Beck G PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| IEB-92-001, IEB-92-1, NUDOCS 9208030294 | |
| Download: ML20099C084 (4) | |
Text
NRCB No. 92-01 10CFR50.54(f)
PHil/ DELPHIA ELECTRIC COMPANY NUCLEAR GROUP HEADQUARTEAS j
95s-65 CHESTERBROOK BLVD, j
WAYNE, PA 19087 5691 i
(at s) s40-sooo July 24, 1992 Docket Nos. 50-277 j
50-278 50-352 1
50-353 License Nos. DPR-44 i
DPR-S6 j
NPF-39 i
NPF-85 e
i 1
U.S. Nuclear Regulatory Commission i
Attn: Document Control Desk Washington, DC 20555 l
SUBJECT:
Peach Bottom Atomic Power Station, Units 2 and 3 Limerick Generating Station, Units 1 and 2 Response to Nkt Balletin No. 92-01, " Failure of Thermo-Lag 330 Fire Barrier System to Maintain Cabling in Wide Cable Trays and Small Conduits Free from Fire Damage" l
Gentlemen:
NRC Bulletin (NRCB) No. 92-01, " Failure of Thermo-Lag 330 Fire Barrier System to Maintain Cabling in Wide Cable Trays and Small Conduits Free from Fire Damage,"
was issued on June 24, 1992 to notify licensees of failures in fire endurance testing associated with the Thermo-Lag 330 fire barrier systems installed to protect-safe shutdown capability.
Because of failures experienced during recent fire endurance testing of Thermo-Lag 330 fire barrier systems conducted by Texas
[
Utilities (TV) Electric, the NRC detennined that the one (1) and three (3) hour pre-formed assemblies installed on small conduit and wide cable trays-(wider than 14 inches) do not provide the level of safety as required by NRC requirements.
Accordingly, NRCB No. 92-01 reauested licensees to take the immediate actions
-identified below.
1.
For those plants that use either 1-or 3-hour pre-formed Thermo-Lag 330 panels and conduit shapes, identify the areas of the plant which have Thermo-Lag 330 fire barrier material-installed and determine the pbit areas whici use this material for protecting either small diameter conduii. or wide trays (widths greater than 14 inches) that provide safe shutdown capability.
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,U.S., Nuclear Regulatory Commission July 24, 1992 Document Control Desk Page 2 2.
In those plant areas in which Thermo-Lag fire barriers are used to 4
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protect wide cable trays, small conduits, or both, the licensee should implement, in accordance with plant procedures, the appropriate compensatory measures, such as fire watches, consistent with those which 4
would be implemented by either the pleat technical specifications or the operating license for an inoperable fire barrier.
3 3.
Each licensee, within 30 days of receiving this bulletin, is required to provide a written notification stating whether it has or does not have Thermo-Lag 330 fire barrier systems installed in its facilities.
Each licensee who has installed Thermo-Lag 330 fire barriers is required to inform the NRC, in writing, whether it has taken the above actions and is required to describe the measures being taken to ensure or restore fire barrier operability.
Philadelphia Electric Company's (PECo's) response to NRCB No. 92-01 is provided below.
l
Response
PECo does have Thermo-Lag 330 firt barrier systems installed at Peach Bottom Atomic Power Station (PBAPS), Units 2 and 3, and Limerick Generating Station (LGS), Units 1 and 2. Those areas of PBAPS and LGS which have Thermo-Lag 330 fire barrier material installed on conduit four (4) inches or smaller and cable trays i
wider than 14 inches to protect safe shutdown capability have been identified, and the associated fire barriers have been declared inoperable. Additionally, the appropriate compensatory measures (i.e., fire watches) have been established in j
accordance with PBAPS and LGS Technical Specifications (TS) in those areas or NRC i
approval has been obtained for the use of an equivalent method of complying with TS fire watch requirements. Specifically, by letter dated July 2, 1992, we received NRC approval for the use of closed circuit television (CCTV) to perform i
the TS required fire watch for the Neutron Monitoring System area for LGS Unit 1.
l Similarly, by letter dated July 17, 1992, we received'NRC approval of our request for a Temporary Waiver of Compliance from the TS required continous fire watch.for the Pipe Tunnel area for PBAPS Unit 2 until we could install the temporary fire j
detection equipment and CCTV system, also approved by the NRC in the July 17, 1992 j
letter, to perform a TS required hourly fire watch for the Pipe Tunnel area.
These compensatory measures will remain in effect until the appropriate actions have been taken to restore fire barrier operab;1ity.
Such actions are being developed through an industry program being coordinated by the Nuclear Management and Resources Council (NUMARC).
This program will include-establishment of a test database, development of guidance for applicability of tests, development of generic install;cion guidance, and consideration and coordination of additional testing as appropriate. We intend to apply the appropriate results of these efforts, when completed, to the Thermo-Lag installations within the scope of NRCB Nc. 9?-01.
I Accordingly, we will provide the NRC with a supplemental response describing the actions taken to restore fire barrier operability once implemented.
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1
, U.S., Nuclear Regulatory Commission July 24, 1992 Document Control Desk Page 3-4 If you have any questions, please do not hesitate to contact us.
Very truly yours, G. J. B
, Manager l
Licensing Section l
Nuclear Services Department
Enclosure:
Affirmation cc:
T. T. Martin, Administrator, Region I, USNRC-4 4
J. J. Lyash, USNRC Senior Resident Inspector, PBAPS T. J. Kenny, USNRC Senior Resident Inspector, LGS i
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4 l
e s
i J
4 COMONWEALTH OF PENNSYLVANIA :
ss.
COUNTY OF CHESTER G. R. Rainey, being first duly sworn, deposes and says:
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That he is Vice President of Philadelphia Electric Company; that he has read the foregoing response to NRC Bulletin No.:92-01, " Failure of-Thermo-Lag 330 Fire Barrier System to Maintain Cabling in Wide Cable Trays and Small Conduits Free from Fire Damage," for Peach Bottnm Atomic Power Station, Units 2 and 3, cnd Limerick Generating Station, Units 1 and 2, and knows the contents thereof; and that the statements and matters set forth therein are true and correct to the best of his knowledge, information and-belief.
/
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Vice President l 3
t Subscribed and sworn to d
before me this A//
day
.of gut y, 1992.
$ then,, l })r e, k
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Notary Public F
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