ML19341C975
| ML19341C975 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 02/27/1981 |
| From: | TENNESSEE VALLEY AUTHORITY |
| To: | NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II) |
| Shared Package | |
| ML19341C974 | List: |
| References | |
| LER-81-009-03L-01, LER-81-9-3L-1, NUDOCS 8103040643 | |
| Download: ML19341C975 (2) | |
Text
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- 4 to 61 OOCKET NVMSER Evf NT DESCn.PTION AND PROSA8LE CONSEQUENCES h l D'tring nornal operation. while verfoming SI h.c.A.1 surelement A. D/G '4C fail-1 to l
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1 O I 31 l stop within appropriate time frame during nomal diesel shutdown. Diesel was shut-
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f7TTl i down manually isolating the fuel. On attemeted restart the diesel failed to start on 1 4
l o I s l I two of three attempts. The diesel generator was then declared inoverable. Other l I O is I l equiment recuired by tech. stecs. was overable. I!o significant resulting events. Nel I o i il 1 dan.7er to health or safety of public. Uo erevious events.
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l i l o l ] Investigation by elect. main, revealed nothing that would have prevented D/G from l Iil l l starting. Do starting problems were experienced during investigation. Since event I rTT 1 l D/G has been successfully tested for operability several times. SI program and l Ib g l bimonthly redtuxiant start testing should identify any starting problems. l t i i i t I recurrence control is required. l 80
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Tennessee Valley Authority Form BF-17 Browns Ferry Nudear Plant BF 15.2
- 1/10/79 LER SUPPLEMENTAL INFORMATION B FRO 2c6 /_81000 Technical Specification involved 3.9.3.2 Reported Under Technical Specification 6.7.2.b. (2)
- Date of Occurrence 2/7/61 Time of Occurrence ch22 __ Unit 3
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Identification and Description of Occurrence:
During a nomal diesel shutdown. D/G 3C failed to stop within the appropriate time frame. The diesel was shutdown by =anually isolatin6 the fuel. On atte=pted restart the diesel failed to start on two out of three attempts. The diesel generator was then declared inoperable.
Conditions ' Prior to Occurrence: ,
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Action specified in the Technical Specificaticn Surveillance Requirements met due to inocerable equipment. Describe.
Equipment required by tech specs wa's operable,
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Appa_ rent Cause of Occurrence:
Investigation by electrical maintenance personnel did not reveal anything .that would have e
prevented the D/G from starting. Ihe reason the D/G failed to stop was failure or A!ECR (engine control relay). Also the seal-in contact for STLDI (start lockout relay for start circuit 1) was ' chattering. Ileither of these relsys separately or together would have pre-vented the D/G frem starting or made the D/G inoperable. The STLDI problem would have
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Analysis of Occurrence: trasuited in atte-mts to start beyond the coreal three attempts.
There was no damage to plant equipment. There was no activity release, no personnel
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exposure or injury and no danger to the health or safety of the public.
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- Corrective Action: Th'c ECR AIO STLDI relays were replaced. portions of the redundant start test were satisfactoril'; performed. D/C operability was verified by performance of SIh.9.A.1 supplement A. IIo problems with starting were experienced during investigation by electrical maintenance pers,nnel. Tio recurrence control is required. *he present .-onthly SI program and hi-enthl: remindant start testing should identify any problems with D/G starting. Since f.hc event the 3/r has tested for operability several times. The next scheduled redundant
! Failure Data: start test is for the period Feb. 23 through " arch 6. This should serve as an adecuate follow up on any start problems.
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- Retention : Period - Lifetime; Responsibility - Administrative Supervisor
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- Revision: s
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