ML20064F271

/03L-0 on 781027:while in Mode 1,the Steam Line Pressure Instru Assoc W/Pressure Transmitter PT-484 Failed Low.Caused by Failure of Loop Pwr Supply isolated/non- Isolated(Nlp)Card POY-484

ML20064F271
Person / Time
Site:	Farley
Issue date:	11/20/1978
From:	ALABAMA POWER CO.
To:
Shared Package
ML20064F267	List: ML20064F266 ML20064F271 ML20064F274 ML20064F279
References
LER-78-080-03L, LER-78-80-3L, NUDOCS 7811280339
Download: ML20064F271 (1)

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U. S. P3UCLEAR REGULATORY COMunSSioN r.nt*rORt.1[6G (7 77)

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7 6 60 61 ET NU*.tBER EVENT DESCRIPTION AND PRO 8 ABLE CONSEQUENCES h I o l 2 l l While in Mode I the steam line pressure insernnentnrinn ncencinena ufch nrosenrn l Io lal l transmitter PT-484 failed low. Steam pressure Loops 1, 2, 3 Protection Channel II l

[op.:; l was declared inoperable at 2235 on 10/27/78 and placed in the tripped condition. l to is1 I The channel was restored to an operable status at 0033 on 10/28/78. Tech Spec. 3. 3. 2.q lo is l l action statement requirements were met (other protection channels were operable). l l 0 l 7 l l This occurrence had no ef fect on the health and safety of the general public. l gi i 80 I a 9 SYSTEM CAUSE C A:.lSE COMP. VALVE COOE CODE SUS;OCE COMPONENT CODE SUSCODE SUBCODE O o l it al@ I rl@ I c l@ 11 IN is IT la lu l@ LP_jh [Zj h 1;J 12 13 18 19 20 7 8 9 11 SEQUENTI AL OCCURRENCE REPORT REVISION

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@ g.ER'gAO17 I a I l-l 10 18 10 I l/l 10131 Lt_1 l---J l_0_J

_2n 22 23 24 26 27 23 29 30 34 32 TAK N ACT ON ON P ANT T HOURS 22 SB IT FO 9. 5 PPLIE ' MA F C RER gg lClgl34Z lg l35Z lg l [N Jg lY l g [N J g lW l1 l2 l0 lg 34 36 3lJ0 l0 l0 l 4J 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS ke Iitol1 Loop power supply isolated /non-isolated (NLP) card PQY-484 (style 2837A12C02) failure.l

[,l3 l l PQY-484 was replaced. The replacement card was calibrated and the ch nnel functionally

- , j tested in accordance with FNP-1-STP-213.10. Other NLP card failures have been reportej l in LER's 78-025/03L-0 and 78-052/03L-0. l I

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