ML19095A529

Submit Reportable Occurrence No. RO-S1-77-10 Re Malfunctioning High Steam Flow Relay

ML19095A529
Person / Time
Site:	Surry
Issue date:	04/15/1977
From:	Stallings C Virginia Electric & Power Co (VEPCO)
To:	Moseley N NRC/RGN-II
References
Serial No. 162 LER 1977-010-00
Download: ML19095A529 (3)

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LICENSEE EVENT REPORT CON TAO L BLOCK : .._l__._1_e,,_..___._1_*__.___.____, [ P . E PRINT ALL REQUIRED INFORMATION}

1 6 LICENSEE LICENSE EVENT NAME LICENSE NUMBER TYPE TYPE 7

@EllvlAlslPlsliJ 8 9 14 Lo 15 Ia 1-1 a I a I a I aIo 1-1 o.il.J 25 l411l1l1lol 26 30 I31al 321 I REPORT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE REPORT DATE

@E]coN'T IP Io I L!J ~- lo ls lo I-lo 12181 al lol3l2l8hl1 lo75 14 I1 14 '7 I 280 7 8 "57 58 59 60 61 68 69 74 EVENT DESCRIPTION

!ol2J I While operating at 99% power during the conduct of PT-8.3A. (Safety Injection System 7 8 9 80

!bl31 I Logic) it was noted High Steam Flow relay (FC-485-XA) malfunctioned, Tnvesti gati au I 7 8 9 80

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I revealed .that the RF-48 relay contacts,* uanna]Jy open wjth ~team flow within estab 9

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! lished parameters-, would not close under condjUons of simulated high steam_ fJow.

9 80 I

(Q]§] IA maintenance report was initiated and the relay was repaired and returned (Cont'd) I I

I 7 8 9 PRIME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPLIER MANUFACTURER VIOLATION

@El 7 8 9 h 10I A I ULJ 11 IR IE IL I A I YI xi17 12 w 43 lwl1'2lol47 44 w 48 CAUSE DESCRIPTION

@RJ IExamination revealed that foreign material impregnated the BF relay and force folly 7 8 9 80 I

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!opposed closjng tbe contacts, Once the debris was removed tbe relay operated properly, 9 .

• J 80 I

[TI§] !since this same test was conducted successfully less than a month previously (Cont'd) J 7 8 9 60 FACILITY METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY a°ESCRIPTIDN EE]

7 8 w

9 Ia I 9 I 9 12 10 13 N/A 44 w45 I~_W1_1_i_l_e_c_o_n_d_u_c_t_1._*n~g_m_o_n_t_h_l~y_t_e_s_t____ ,

46 80 FORM OF*

ACTIVITY CONTENT LOCATION OF RELEASE rn w RELEASED OF RELEASE AMOUNT OF ACTIVITY 7 B g WI 10 11 N/A 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

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7 8 9

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• 13 60 PERSONNEL INJURIES NUMBER DESCRIPTION EEJlo!olol N/A 7 8 9 11 12 80 OFFSITE CONSEQUENCES El~

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8 9

• 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION.

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.BO PUBLICITY E0 I N/A. _J 80 7 B 9 ADDITIONAL FACTORS G}fil !The compa~ion relay (FC-48;5-XB) and the other i.nstrum~nt channeuex:e op..er.able to 7 8 9 80 7

GliJB 9b.ure that the one out of two high steam flow rnatrjx would have bee.11___.(Q.ontinued) 8D J

Tyndall L~ Baucom N A M E : ~ ~ ~ - - ~ - - ~ ~ ~ - ~ - - - ~ ~ ~ - - , - ~ - PHONE: _ _ _ _ _ _

(804) 357 3184 - .

GPO 8 61 ; 6 6 7

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1 EVENT DESCRIPTION (CONTINUED) to service operating properly. This event is contrary to Technical Spec*ification

.3.7 and is reportable per Technical Specification 6.6.2.b(l). (RO-Sl-77-10)

CAUSE DESCRIPTION (CONTINUED) and no maintenance had been performed in this area, it is hypothesized the foreign matter had been lodged within the relay for some time without obstructing its.

operation but had altered its position since last tested. This is the first recorded_instance of relay failure attributable to this cause; therefore, no generic problem is apparent and no additional or accelerated surveillance is anticipated.

ADDITIONAL FACTORS (CONTINUED) maintained in loop B. Therefore, adequate redundancy was maintained and neither the safety related systems nor the health and safety of the general public were jeopardized.

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