05000272/LER-2077-050-01, Failure of No. 12 S/G Pressure Channels I and II
| ML19031A542 | |
| Person / Time | |
|---|---|
| Site: | Salem  |
| Issue date: | 07/19/1977 |
| From: | Librizzi F Public Service Electric & Gas Co |
| To: | O'Reilly J NRC/IE, NRC Region 1 |
| References | |
| LER 1977-050-01 | |
| Download: ML19031A542 (6) | |
| Event date: | |
|---|---|
| Report date: | |
| 2722077050R01 - NRC Website | |
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Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /622-7000 Mr. James P. O'Reilly Director of USNRC Office of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406
Dear Mr. O'Reilly:
LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 77-50/0lT
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Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1, we are submitting Licensee Event Report for Reportable Occurrence 77-50/0lT.
This report is required within fourteen (14) days of the occurrence.
CC:
Director, Office of Inspection and Enforcement (40 copies)
Director, Office of Management Information and Program Control (3 copies)
Sincerely yours,
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F. P. Li rizzi0 General Manager -
Electric Production 77208(1:346
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Report Number:
Report Date:
Occurrence Date:
Facility:
77-50/0lT 7 /13/7.7 7/06/77 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:
Failure of No. 12 Steam Generator Steam Pressure Channels I and II CONDITIONS PRIOR TO OCCURRENCE:
Operational Mode 1, Reactor Power: 50%
DESCRIPTION OF OCCURRENCE:
At 1755 hours0.0203 days <br />0.488 hours <br />0.0029 weeks <br />6.677775e-4 months <br />, during a severe electrical storm, No. 12 Steam Generator Steam Pressure Channels I and II indicated high.
Instrumentation per-sonnel were notified and at 1930, declared the two channels inoperable.
Technical Specification 3.3.2.l, Table 3.3-3, requires a minimum of two (2) steam pressure channels per steam line to be operable during Mode 1 operation.
With No. 12 Steam Generator Steam Pressure Channels I and II inoperable, conditions in excess of LCO 3.3.2.lb existed; there-fore, at 1930, Technical Specification 3.0.3 was implemented and a power reduction was started to comply with the 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br />, Mode 3 require-ment of specification 3.0.3.
At 2025 hours0.0234 days <br />0.563 hours <br />0.00335 weeks <br />7.705125e-4 months <br />, the pressure transmitter for No. 12 S/G pressure channel II had been replaced and channel II was declared operable.
Action Statement 3.0.3 was terminated and Action Statement 3.3.2.lb was implemented.
After placing No. 12 S/G Pressure Channel I in the tripped condition, a power ascension from approxi-mately 15% was initiated.
At 2300 hours0.0266 days <br />0.639 hours <br />0.0038 weeks <br />8.7515e-4 months <br />, the pressure transmitter for No. 12 S/G pressure channel I had been replaced and channel I was declared operable.
Action Statement 3.3.2.lb was then terminated.
DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:
The No. 12 Steam Generator steam pressure channels failed simultaneously during a severe electrical storm.
Preliminary investigation revealed that the force motor in each transmitter had failed electrically.
The cause of this occurrence is believed to have been a lightning strike in the South Penetration area, but the investigation is incomplete at this time.
ANALYSIS OF OCCURRENCE:
Technical Specification 3.0.3 states that in the event a Limiting Condi-tion for operation and/or associated action requirements cannot be satisfied because of circumstances in excess of those addressed in the specifications, the facility shall be placed in at least HOT STANDBY
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. " Report No. 77-50/019
,, 7/13/77 within 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and in COLD SHUTDOWN within the following 30 hours3.472222e-4 days <br />0.00833 hours <br />4.960317e-5 weeks <br />1.1415e-5 months <br /> unless corrective measures are completed that permit operation under the permissible Action Statements for the specified time interval as measured from initial discovery.
At 1755 hours0.0203 days <br />0.488 hours <br />0.0029 weeks <br />6.677775e-4 months <br />, No. 12 Stearn Generator pressure channels I and II failed.
At 1930, a power reduction to HOT STANDBY was initiated.
At 2025, No. 12 S/G Steam Pressure Channel II was re-turned to operable status and Action Statement 3.0.3 was terminated.
Channel I was placed in the tripped condition and specification 3.3.2.lb was implemented.
Unit power ascension from approximately 15% was initiated.
Technical Specification 3.0.3 required the unit to be in HOT STANDBY at 1855 hours0.0215 days <br />0.515 hours <br />0.00307 weeks <br />7.058275e-4 months <br />; therefore, the unit was operable for 1 hour1.157407e-5 days <br />2.777778e-4 hours <br />1.653439e-6 weeks <br />3.805e-7 months <br /> and 30 minutes in violation of the Technical Specifications.
This is a licensee identified item of non-compliance.
CORRECTIVE ACTION
Two new pressure transmitters were obtained from spares, bench cali-brated, and installed in place of the failed units.
A comparison check was made with other operable channels to confirm operability.
FAILURE DATA:
No. 12 Steam Generator Pressure Channel I and II (lPT-524 & lPT-525)
Manufacturer:
Model:
Input:
Output:
Serial Nos.:
Fischer Porter Warminster, Pa.
50EP1041BCXA 0 -
1200 psig 4 -
20 ma DC 6906A5352A29 6906A5352A30 Prepared by T. L. Spencer
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SORC Meeting No.
75-77
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CONTROL BLOC!<
e LICENSEE EVENT REPORT 6
LER 77-50/0lT 7/14/77 L.ICENSEE L.ICENSE EVENT NAME L.JCENSE 1'jUMBER TY!'E TYPE
@E!N1J1s1G1s1~1 J50101-101oi'o10101-101gJ k4lll ll ll l~ WJl.J REPORT REPORT CATEGORY TY~E SOURCE DOCKET NUMBER EVENT CATE REPORT CATE loTil CONI LJ_j L'rJ Li.J r----1 57 5B
- is 60 I 0 I 51 0 I -I 0 I 2 I 71 21 61
~ 1017101617171 69 74 10 17 11 14 17 17J 75
EVENT DESCRIPTION
@EJIDuring a severe electrical storm, No. 12 S/G pressure channels I and II 7
8 9
@ID ailed.
7 8 9 Action Statement 3.0.3 was im lemented and a ower reduction was I
80
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7 8 9 Both force motors had failed in the transmitters and new trans-
~lmitters were installed.
Action Statement 3.0.3 was terminated.
this type.
(77-50/0lT) 7 8 9
~!the first occurrence of 7
8 9 SYSTEM COCE
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8 9 10
CAUSE
COOE LCJ 11 CAUSE DESCRIPTION COMPONENT COOE I I I N I S I T I R_JQJ 12 17 PRIME COMPONENT SUPPL.I ER IJJ 43 COMPONENT MANUFACTURER IF 11 I 21 01 44 47 VIOL.ATION LXJ 48 This is
~l;ause is still under investigation, but is believed to have been caused
@Jrl1 a lightning strike in the South Penetration Area.
7 8 9 I
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8~9-~--~----~-~~--~~~~-~-~--~--~-~--~--~~-~e:J FACIL.ITV METHOC OF ITEJ STATUS
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10 12 lJ 44 45 46 60 FORM OF ACTIVITY CONTENT [ili]
REL.EASEC OF REL.EASE AMOUNT OF ACTIVITY I
LOCATION OF REL.EASE lLJ w I N/A I
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10 11 44 45 ao PE~SONNEL EXPOSURES NUMBER TYPE OESCRl?TION GE1010101 lZJ NA 7
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11 12 l~J:---~-~~--~~--~----~--~---~-~-~--~80 PERSONNEL INJURIES NUMBER oe:sc;:uPTION
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8 9 11 12 80 OFF~TECONSEQUENCES i1js1 N A LOSS OR DAMAGE TO FACILITY GE] 19v;j i°ESCRIPTION N/A 1
a to NAME: ________
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PHONE: ( 609) 3 65-7 000 Ext. s al em 528 J
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I o'Jtrc S-e'"'*?o;;:'& E.i~n.c ar-d Gas C_On"tt-arty 3;;~":"'1 G~'i~'af:ry.~ Sratii:m P. 0. Bo'.11 ~H:a Har?Cocks Brrege. Nell'li* JerSf?Y 08039 Ju1y 7, 1977 Mr. James ~. o*Reilly Director of USNRC Office of lnspections and Enforcements Region i*
631 Park Avenue King of ?russia,; Pennsylvania 19406 REPORTABLE occua..~NCE 77-50/0lP SALEM NO. l UNIT-LER This letter serves to confirm our telephone report of July 6, 1977, advising of a reportable occurrence in accordance with Technical SpecificatiQns Section 6.9.1 *. On July 6, 1977, at 1755 hours0.0203 days <br />0.488 hours <br />0.0029 weeks <br />6.677775e-4 months <br /> during a severe electrical storm, two steam pressure ch~nnels {Channels l s 2) associated with No. 12 Steam.Generator indicated high.
At 1930 hours0.0223 days <br />0.536 hours <br />0.00319 weeks <br />7.34365e-4 months <br /> Channels l & 2 were declared inoperable and a power reduction to_hot standby was initiated to comply with Technical Specification action statement 3.~.3 (Less than minimum channels operab1e for differential pressure between steam lines hiqh -
2/steam line required per Table 3~3-3).
At 2025 t.a'le acti.on state.-nent to be in hot standby within one hour was t~rm:inated at ~ reactor power level of approxir.~tely 15% since the Channel 2_pressure transmitter was returned to operable st<;itus.
After".placin9 Channel l in. the tripped condition. putti.!'g the plant in action statement 3.3.2.J.b, power ascension: was initiated.
A detailed reportable occurrence report wi.11 be submitted in the tbne ~riod specified by Technical Specifications *
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Very trul.y yours,
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H. y_*Hel1er
.Manaqer -
Salem Generating Station.
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Genera1 Manager -
Electrica1 Production Manager -
Qua1ity Assurance
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