ML18348A230

LER 1977-025-01 Backup Heat Tracing Circuit Being Out of Service for Period of 40 Days

ML18348A230
Person / Time
Site:	Palisades
Issue date:	06/10/1977
From:	Hoffman D Consumers Power Co
To:	James Keppler NRC/IE, NRC/RGN-III
References
LER 1977-025-01
Download: ML18348A230 (3)

Text

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consumers

• Power company General Offices: 212 West Michigan Avenue, .Jackson, Michigan 49201

• Area Code 517 788-0550

.June 10, 1977 Mr James G Keppler Office of Inspection and Enforcement Region III US Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 DOCKET 50-255 - LICENSE DPR PALISADES PLANT - ER-77-025 -

BORIC ACID HEAT TBACING SYSTEM On Jvne 3, 1977, J G Lewis contacted K Baker, IE Inspector, for app~oval to delay the -submittal of this event report .

The event involves the backup heat tracing circuit being out of service for a period of 40 days. The supplement to the event report is attached to identify a detailed discussion of the event, corrective action already im-plemented and an indication of future changes.

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David P Hoffman Assistant Nuclear Licensing Administrator JUN 13 1977

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.6cENSEE EVENT REPORT Palisades CONTROL BLOCK: i. .1--1...--.1.I__,_I___,_1---'l~I (PLEASE PRINT ALL REQUIRED INFORMATION]

1 6

~ LICENSEE LICENSE EVENT 1* ' NAME LICENSE NUMBER TYPE TYPE

'1MIIIPIAILlll *10101-10101010101-1010 I l411l1l1l1I I oI 1 I

. 7 8 9 14 15 25 26 30 31 32 RETYPOPRTE. REPORT SOURCE OOCKef NUMBER EVENT CATE REPORT CATE

@illcoN'T f*r-*I L!J ~ IOI 5101-10121515 I IOl5lll9l7171 1016111011111 7 .8 57 58 59 60 61 68 69 c 74 75 BO EVENT DESCRIPTION lol 21 I The Palisades Plant backup heat tracing circuit *for borated lines was inadvertently I 7 B 9 80 lol3llL _1_e_f_t_d_e_-_e_n_e_r.::g;....i_z_e_d_f_o_'r_a......;:p;....e_r_i_o_d_o_f_4_0_d_a..:y_s_.__Th_e_ev_e_n...t...._d_e_s_c_r_i.;;.p_t_i_on_i_*s_c_o_n_t_i_n_u_e_d_. ---::::!I 7 B 9 BO lol41 I on the attached* sheet. .I 7 B 9 BO 7lol518 9 *'----------------------------------------*-/-------------------------= BO lol6I *~1------------------------------..,..-------------~(~ER_-~7~7-_0_2~5~)---------:~I 7 B 9 PRIME BO SYSTEM CAUSE CCMPONBllT CDMPONBllT CODE COOE COMPONENT COOE SUPPUER MANUFACTURER VIOLATION 7

@0 B 9 IP IcI ~

10 . 11 12 IHIEIAITIEIRI 17 LI.J43 44 I z I 9 I9 I9 I 47 w 48 CAUSE DESCRIPTION lo 101 1..I__:Th:.:*::.:e::_::c:.:i:.:r.:::c:.:::u:.:i:.::::t....::.b.:.r.::::eak:::::e::.:r:....:f:.:o::.:r:.......:t:;;:h:.::e;....:::b.::a~ck~u:::;.p~h:.::e:..::a:.:t:....::t:.=.r.::::a::::.c.:::.in:::.gQ....;c::,.;1:.:"r:..:C:.::U::..:i:..:t:.-.::w~a:.::::s-...:::.t:.::.ag~g~e...d=--.:o.:.:u;:;.:t~f;..;:;o:...r__..e....

1""e""ct"""r.._1.,.*c....a...1::1 7 8 9 80 lo Isl LI _r:;.e:.;P::.:a=i:.:r:.:s:.....:a:::n:.:d:...::n:=o.:t_::.r.::.ec.::.o~ga:n::.;1:.:*z:.:e:.:d:....:a;::s.......::h.::::av.:..::::in::ig~a::....:T:.:e:.::c:;;:h:::n:.:i~c.::a:::.1....:8:::..Pi:;:.;e:;.:c:.;i:;.;:f;.;:i:..:;c:.:::a:.::t;.;:;i~o.:;:n.::.s_t.::.i~*m::;:;e:::....;r:..:e:::;.:g:.::u~i=-=r~e::;;m~e... n~t-=-. --:::::I

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• FACILITY STATUS  % POWER OTHER STATUS METHOD OF=

DISCOVERY DISCOVERY DESCRIPTION EElB 9L!J 7 10 I1 I 0 I 0 I Period Included 12 13 Routine Shutdomfl4 W

45 46 See attached supplement.

80 FORM OF ACTIVITY . CONTENT 7

rn 8 RELEASED W

9 OF RELEASE W

10 11

. _ I_ _. . . . .

AMOUNT OF ACTIVITY N,.,...A.____ _ ___.I 44 45 I

LOCATION OF RELEASE NA BO PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION

[El Io 1 01 01 ~ NA 7 8 9 11 12 13 80 PERSnNNEL INJURIES NUMBER DESCRIPTION EE1 I 0 I 0 I 011I 7 8 9 12 NA 80 PROBABLE CONSEQUENCES (Tifil I None. The redundant (primary) circuit remained in operation.

7 8 9 80 LOSS OR DAMAGE TO FACILITY 7

[fil 8 9 w

TYPE 10 DESCRIPTION NA 80 PUBLICITY

[ill] NA*

7 8 9 80

~ ADDITIONAL FACTORS

~ I See attached supplement.

7 8 9 80 7

GE8 9 80

• SUPPLEMENT - EVENT REPORT ER-77-25 The boric acid heat tracing system consists of two separate, redundant circuits or "channels." Each circuit feeds identical piping runs, only some of which are necessary for safeguards flow paths. Temperature recorders provide moni-toring at various points along the heat traced piping.

Only one of the two heat tracing circuits is normally energized with the other serving as a backup and the two rotated periodically. In this event, elec-tricians received clearance tagging for repair of a portion of the backup channel. Neither electricians nor operations personnel recognized at that point the time requirement of Technical Specification 3.2.3.d. The condition remained until recognized by a Shift Supervisor prior to start-up from a cold shutdown on 5-19-77. Both circuits were then made operable prior to plant heatup. J' The normal administrative control of equipment tag out is an Equipment* Outage Request (EOR) form on which the Shift Supervisor denotes operability require-ments. The Maintenance Supervisor initiates this form based on the plant Q-List, but in this case, the heat tracing breaker was not Q-Listed and both parties missed the 24-hour requirement. Contributing factors were probably the history of regular required maintenance on individual points and the fact that one channel is normally turned off anyway. To tighten this con-trol, we have generated a condensed list of all Chapter Three equipment for screening use by Maintenance Supervisors and as a reference for Shift Super-visors.

The investigation of the specific problem with the heat tracing indicates some confusion with Technical Specification 3.2.3.d. We interpret this literally to refer to the entire channel out of service and will address individual point problems in decisions on minimum flow path operability of the other paragraphs in that section. Technical Specifications changes will possibly be requested to more clearly show the intent, such as the wording in the standard specifications.

Increased emphasis has been placed on maintenance of the heat tracing system and we are considering a modification to decrease the problems .