05000281/LER-1978-041-03, /03l on 781201:failure of Heat Tracing Circuit 5A (Panel 10)Unit 2 Blender to Charging Pump Suction Due to Water Damage of Heat Tracing Circuit.Heat Tracing Tape Replaced

/03l on 781201:failure of Heat Tracing Circuit 5A (Panel 10)Unit 2 Blender to Charging Pump Suction Due to Water Damage of Heat Tracing Circuit.Heat Tracing Tape Replaced

ML18113A722
Person / Time
Site:	Surry
Issue date:	12/18/1978
From:	Baucom T VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML18113A721	List: 05000281/LER-1978-041, Forwards LER 78-041/03L-0 05000281/LER-1978-041-03, /03l on 781201:failure of Heat Tracing Circuit 5A (Panel 10)Unit 2 Blender to Charging Pump Suction Due to Water Damage of Heat Tracing Circuit.Heat Tracing Tape Replaced
References
LER-78-041-03L-01, LER-78-41-3L-1, NUDOCS 7812270281
Download: ML18113A722 (2)

LER-1978-041, /03l on 781201:failure of Heat Tracing Circuit 5A (Panel 10)Unit 2 Blender to Charging Pump Suction Due to Water Damage of Heat Tracing Circuit.Heat Tracing Tape Replaced

Event date:
Report date:
2811978041R03 - NRC Website

text

~1.'~.. --~ __ 1_c_~-;- *-

u. _:,. 1\\IUC.LCMH ncGULM l~MMl~IU~

LICENSEE EVENT REPORT COJ'ITROL BLOCK: LI _L...-_.__.__l.__!~_--,!10 : -*... (PLEASE PRINT 0-R TYPE,L-REQUIRED INFORMATION) 1 6

~

., v, A* 1 s Ip Is 12 101 ° 1 ° 1 -1 ° 1 ° 1 ° 1 °, 0 1 - 1 ° r O 101 4 11 11 11, 1 101

• 1 1 7

8 9

LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 30 57 CAT SB

. CON"T I O I 1 I 7

_8

((ill [ill]

[Q]I]

'IT))]

[ill]

@TI]

((I))

~~~~~~-. L!:J© I 01

• s I o I o I o I 2 I a I 1 101 1 I 2 I o 11 1 1 I s I@ I -11 21 ii a1 11 a 1@

60 61 DOCKET NUMBER 68

. 69 EVENT DATE 74 75 REPORT DATE

, 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

I During n?rmal operation, routine surveillance revealed the failure of heat tracing circuit SA (panel 10) Unit #2 Blender to charging pump suction.

This is a degraded mode of operation permitted by T. S. 3.3.s.5, and is reportable as per T.S. 6.6.2.b.(2). The health and safety of the public were not affected.

7 8 9

_(ill]

7 8

SYSTEM CODE

,s !HI@

9 10 LER/RO CEVENT YE.A.A REPORT I 1 I s 1 NUMBER 21 22

CAUSE

CAUSE COMP.

CODE SUBCODE COMPONENT CODE SUBCODE l:.J@ ~@ jH !E jA JT IE jR 1@ ~

11 12 13 18 19 SEQUENTIAL OCCURRENCE REPORT REPORT NO.

CODE TYPE VALVE SUBCOOE L:J@**

20 I I

.I O 141 1 I l/l I O I 31

~ I I 23 24 26 27 28 29 30 31 ACTION FUTURE TAKEN ACTION EFFECT SHUTDOWN t:;::..

ATTACHMENT NPRD-4 *

• PRIME ~OMP.

REVISION NO.

~

32 COMPONENT MANUFACTURER 80 ON PLANT METHOD HOURS ~ SUBMITTED FORM SUB.

SUPPL_IER

~@UI@ LU@

W

• I 01 o I o Io I L!.J@ ~ -~@

33 34 35 36 37 40 41 42 43

. IC I 2161 s 1@

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS@

• • rr:::r:::[J I A review of the heat tracing circuit showed that failure was caused by 44 47 l.

OJI] __, ____ w_a __ te __

r_d_a_m_a_g_e __ o_f_t_h_e...... H_e_a_t __

T_r_a_c_i_n_g __

c_i_rc_u~it __

.~T-h_e_,..c_o_r_r_e_c~t-i_v_e __

a_c_t_i_o~n--i_m_p_l_e_m_e_n_te_d __ ~--__,J_

[J;II]._l ___ w a_s __ to __ r_e_p_l_a_c_e~t-h_e __ H_e_a_t __

T_r~a_c_i_n_g __

t_a_p_e_. ____________________..,.. ____________.....,~-------

[JJ]J [ill]

7 8

9 FACILITY

~-

STATUS

% POWER

• . OTHER STATUS ~

'ITIT] ~@ I 11 01 01@1 NA I

8 9

10 12 1'.3 44 ACTIVITY CONTENT

~

RELEASED OF RELEASE AMOUNT OF ACTIVITY ~

[iliJ -~@) ~@1

• NA I

7 8

9 10 11 44 PERSONNEL EXPOSURES t::;:,.

• NUMBER

~

TYPE

DESCRIPTION

[IE) I o I o I oJ~l.2.J@

7.. 8 9 11 12 1-3-------------------------------------------8-aO PERSONNEL INJURIES

~

NUMBER DESCRIPTION~

80 7

METHOO"OF r:;::,..

DISCOVERY DISCOVERY DESCRIPTiON ~

~@... I __

s_u_r_v_e_i _l l_a_n_c_e_T_e_s_t __. _. _________...... }. -

45 46 80 NA

. LOCATION OF RELEASE @

---,-.,..-.,.,....,,,_..,,..,.-,--__,....... _____ _..1.

80

.45 NA Eli] I_ 0 I O j O I@

• NA 1

a 9 11 ~,2:--------------------------'--------------,---------'eo.

LOSS OF OR DAMAGE TO FACILITY '4J' TYPE

DESCRIPTION

~

NA

~~@..

1 a 9

~,0:--------------------------~--------------.-.---------~eo PUBLICITY

(:";:\\

ISSUEDQ DESCRIPTION~

7 8 2 F1 0 ? g'/

NRC USE ONLY IIIIJ lli_Jeil NA l 2 G

e>\\

I I -I I I I I I I I I I I ~

7 8

9 1!-::0:---------------.....!!!:!.. _________________ ~-~----'68 69 NAME OF PREPARER-T,...._L_. _B_a_u_c_o_m __________ _

PHONE: 357-3184 80 ii 0 a.

~~Cl~

f-,, ~tt~~~~e~t.~~:g~ ; :; *;) *. -~

~ ~~~*~*~*-

I 1 *

: ~

Surry Power Station, Unit #2 Docket No:

50-281

• Report No:

• 78-041/03L-O Event Date:

12-1-78 Tit1e of Report:

Low Current on Heat Tracing

1.

Description of Event

2.

With the unit in normal operation at rated power, operator surveillance found that Heat Tracing Circuit 5A (pane1 10) was operating at less than the current specified in the survei11ance document.

Ne low temperature a1arms were indicated.

Investigation for faulty heat tracing tape was. initiated on the affected circuit.* Faults were found on circuit 5A (panel 10) Unit #2 Blender to*

• charging pump suction, and were identified as being the result of water penetration of the tape.

The tape was replaced and circuit current verified to be within specs of the surveillance document.

This is a degraded mode of operation permitted* by T.S. 3.3.e.5 and is reportable in accordance with Technical Specification 6.6.2~b.(2).

Probable Consequerices and Status of Redundant Systems:

• _.

At all times during the event, the temperature of.the affected line was maintained*as required.

The redundant circuit was operable.

There were at all times two operable flow paths for boric acid to the reactor. Therefore, the health ~nd safety of the public were not affected.

3-

Cause

• The reduced currents were due to water penetration damage to the heat tracing tape on the affected circuit.

4.

Immediate Corrective Action

The heat tracing tape was replaced.

• 5.

Scheduled Corrective Action:

The problem was corrected immediately and no further.action is required.

- 6.

Action Taken to Prevent Recurrence:

Continuous surveillance is maintained on the Heat Tracing System.

No additional action is considered necessary.

7.

Generic lmp1ications:

This failure, as with others in the system, is considered random since no specific circuit has exhibited repeated failure.