ML19308D287
| ML19308D287 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 07/08/1977 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | |
| Shared Package | |
| ML19308D095 | List: |
| References | |
| NUDOCS 8002270733 | |
| Download: ML19308D287 (2) | |
Text
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6 AME LCENSE NUMOER PE TYPE F l L l~ C'l R l P l 3 l l 0 l 0-l-l 0l 0 l 0 l 0 l 0 l-l 0 l 0 l l 4l 1l 1l 1l 1l l 0l 3l 7 89 14 15 25 26 30 31 32 T7PU S5 N CATECCRY COCKET NUMOER EVENT DATE AEPOAT CATE
@ CON'T l - l - l lLl lLl l0l5l0l-l0l3l0l2l l 0l 6l 1l 6 l7 l7 l l0 l 7l 0 l 8 l 7 l 7 l 7 0 57 50 59 60 61 68 69 74 75 00 EVEtjT DESCR:PTION o2 l Inoperability of one pair of Auxiliary Building exhaust fans contrary to Technical l
7 89 00 03 l Specification 3.7.8.#1.
Redundant fans were operable and available.
First occurrence l
7 89 00 04 l of this event.
Repairs to ductwork restored fans operable on 21 June 1977.
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7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION O
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3C l Ductwork vibration caused a leak in duct between the fan exhaust and the discharee l
7 89 GO O9 l damper.
Leak was reoaired with a laminated catch 'to strenethen the ductwork and l
7 09 60 P'
preclude reoccurrence.
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% POWER bfHERSTATUS D3COVERY OCCOVERY CESCRIPTON W
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1 70 9
10 12 13 44 40 46 60 EASED OF ASE AMOUNT OF ACTMTY LOCATON OF AELEASE W
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10 11 44' 45 00 PERSONNEL E\\'POSURES NUMBER TYPE DESCAiPTON 8 l 0 l 0 l 01
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7 89 11 12 13 60 PERSONNEL INJunlES NUMDER DESCRPTCN 8 10l0l01 I
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.11 12 60 OFFSITE CONSEQUENCES 3D l
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7 0D 00 LOSS OR CAP.1AGF TO FAC!UTY TYPE DESCA:P'ON
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!1 See attached Supolementarv Information
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800227o 73 3 l 8l I
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' UU nu NAME:
N.
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S t e'm rt THONE: (813) 866-4159
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cro a n i... r. T
k SUPPLEMENTARY INFORMATION 1.
Report No.:
50-302/77-64 2.
Facility:
Crystal River Unit #3 3.
Report Date:
8 July 1977 4.
Occurrence Date:
16 June 1977 5.
Identification of Occurrence:
Inoperability of one pair of Auxiliary Building erhaust fans contrary to Technical Specification 3.7.8.1.
6.
Conditions Prior to Occurrence:
Mode 1 power operation 7.
Description of occurrence:
s At 2120 the Auxiliary Building exhaust fans AHF 14A and AHF 14C were removed from service due to a duct leak located between the fans and the discharge damper. Entered a seven day Action Statement and the duct was repaired with a laminated patch. The system was restored operable on 21 June 1977.
8.
Designation of Apparent Cause:
The cause of this event was determined to be vibration of the system ductwork causing ' a hole between the fans and the discharge damper.
9.
Analysis of Occurrence:
There was no safety significance in that redundant buiiding exhaust system was available and operable.
10.
Corrective Action:
A laminated patch was installed and is expected to strengthen the ductwork to prevent reoccurrence.
11.
Failure Data:
This was the first occurrence of such an event.
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