ML19308D207

RO-77-48:on 770515,33-ft Wind Direction Meteorological Monitoring Instrumentation Channel Found Inoperable.Caused by Sensor Failure.Sensor Renewed

ML19308D207
Person / Time
Site:	Crystal River
Issue date:	06/07/1977
From:	Stewart W FLORIDA POWER CORP.
To:
Shared Package
ML19308D205	List: ML19308D204 ML19308D207
References
NUDOCS 8002270670
Download: ML19308D207 (2)

Text

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' O UCENSEE EVENT REPORT

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[ . CONTROL BLOCK:l l l l l l l (PLEASE PRINT ALL REQUIRED INFCET.1AT:C7J) 1 6 N LCENSE NUM8ER . PE TYPE

]l Fl Ll Cl Rl Pl 3l l 0l 0l_l 0l 0l 0l 0l 0l._ l0 l 0l l 4l 1l 1l 1l 1l l0l3l 7 89 14 15 25 26 30 31 32 CATEGORY 77P C 00CKET NUMBER EVENT CATE REPOAT Caft O 1 CCNT l - l - l l_Tj l 0l Sl 0l-l 0l 3l 0l 2l l0lSl1lSl7l7l 10l6l017l717l 7 8 57 58 59 60_ 61 68 69 74 75 60 EVENT DESCRIPTION gg l In Mode 5, cold shutdown, the wind direction pen on the 33' W/D recorder MM-2A-SR was l 7 89 60 03 l found to be inoperable contrary to Tcchnical Specification 3.3.3.4, Table 3.3-8. l 7 89 .

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@l Redundancy was maintained with the 175' WD instrumentation. First occurrence of ~l 7 89 60 E l this type. De direction sensor was renewad and the system restored operable within l 7 09 80 o5 I u h ,,,,n _ (LER 77-48) l 7 8 ,9 peg 60

'cN" $c'E COMPONENT CCCE SUPPUEA MM VOLATON O l NXI l_Ej lIlNlSlTlRlUl l Al lCl4l1l5l ]48 .

7 89 10 11 12 17 43 44 47 CAUSE DESCRIPTION 'e e l A 012-10 climat wind direction sensor for recorder MM-2A-SR had failed. The sensor l 7 89 SO O l was renewed. l 7 89 60

$I l j FACUTY STATUS ,% POWER OTHER STATUS METHOD 08 CISCOVERY OtSCOVERY DESCRPTON 1

7-8 9

{ l0l0l0l l. N/A l 44

{45 l N/A l 10 12 13 46 EO ACTMTV CONTENT

• AELEASED OF RELEASE AMOUNT OF ACTMTY LoCATCN OF RELEASE 1

(2_J LzJ l N/A l l N/A l 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUMBEA TYPE DESCRIPTCN g l0 l0-[0 l ]12 l N/A l 7 89 11 13 50 PERSONNEL INJURIES l

NUMBER DESCAlPTON 8 lo lo lal11 .12I 7 89 N/A 80 l  !

l OFFSITE CONSEGUENCES '

13 l N/A - -

l 7 89 60 LOSS OR DAMAGE TO FACILITY ,

TYPE CESCRPTON 1

7 89 Wl 10 N/A LO l

PUBUCITY l 17 l N/A l l 7 89 CO l ADDITIONAL FACTCRS See attached Supplementary Informatien.

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to l - 8 0 02 27n C70 J NAME-PHONE: (813) 866-4159

, W. P. Stewart cro au scf

SUPPLEMENTARY INFORMATION O 1. Report No.: 50-302/77-48

2. Facility: Crystal River Unit #3 i

3. Report Date: 7 June 1977

4. Occurrence Date: 15 May 1977

5. Identification of Occurrence:

33 Ft. wind direction meteorological monitoring instrumentation channel inoperable contrary to Technical Specification 3.3.3.4, Table 3.3-8.

6. Conditions Prior to Occurrence:

The plant was in Mode 5 with outage maintenance in progress.

7. Description of Occurrence: ,

At 0800 the wind direction pen on recorder MM-2A-SR was discovered to be  ;'

inoperable. An investigation revealed the direction sensor was not responsive to changes in wind direction. The direction sensor was renewed and the system was restored operable within 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br />.

8. Designation of Apparent Cause:

Failure of the 33 Ft. wind direction sensor.

9. Analysis of Occurrence:

There were no safety implications as the 175 Ft. wind direction was operable and in service and there were no gaseous releases from the plant during inoperability of the 33 Ft. wind direction sensor.

10. Corrective Action:

The sensor for the 33 Ft. wind direction system was renewed.

11. Failure Data:

This was the first occurrence of this type.

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