05000272/LER-2078-043-03, LER 1978 for Reportable Occurrence 78-43/03L on Quadrant Power Tilt Ratio Greater than 1.02

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LER 1978 for Reportable Occurrence 78-43/03L on Quadrant Power Tilt Ratio Greater than 1.02
ML19031B510
Person / Time
Site: Salem  PSEG icon.png
Issue date: 08/24/1978
From: Librizzi F
Public Service Electric & Gas Co
To: Grier B
NRC Region 1
References
LER 1978-043-03L
Download: ML19031B510 (4)
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LER-2078-043, LER 1978 for Reportable Occurrence 78-43/03L on Quadrant Power Tilt Ratio Greater than 1.02
Event date:
Report date:
2722078043R03 - NRC Website
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text

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e PSEG Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /622-7000 Mr. Boyce H. Grier Director of USNRC August 24, Off ice of Inspections and Enforcements Region 1 631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 78-43/03L 1

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Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1.9.b, we are submitting Licensee Event Report for Reportable Occurrence 78-43/03L.

This report is required within thirty (30) days of the occurrence.

Sincerely yours, F. P. Librizzi General Manager -

Electric Production CC:

Director, Office of Inspection and Enforcement (30 copies)

Director, Office of Management Information and Program Control (3 copies)

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Report Number:

Report Date:

Occurrence Date:

Facility:

78-43/03L 8/24/78 8/8/78 Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Quadrant Power Tilt Ratio Greater Than 1.02 CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 1, Reactor Power 52%

DESCRIPTION OF OCCURRENCE:

At 0730 hours0.00845 days <br />0.203 hours <br />0.00121 weeks <br />2.77765e-4 months <br />, following a load reduction to 52%, Quadrant Power Tilt Ratio was determined to be 1.03.

Technical Specification Action Statement 3.2.4.1 was implemented.

Power operation continued.

At 0945 hours0.0109 days <br />0.263 hours <br />0.00156 weeks <br />3.595725e-4 months <br />, the Quadrant Power Tilt Ratio had decreased to less than 1.02 and Technical Specification Action Statement 3.2.4.1 was terminated.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The cause of the increase in Quadrant Power Tilt Ratio resul t'ing from the Xenon oscillations due to the 45% load decrease.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.2.4 states that, "With the Quadrant Power Tilt Ratio determined to exceed 1.02 but < 1.09:

1) Within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> either reduce the Quadrant Power Tilt Rat'Io to within its limit, or reduce Thermal Power at least 3% from Rated Thermal Power for each 1%

of indicated Quadrant Power Tilt Ratio in excess of 1.0 and similarly reduce the Power.Range Neutron Flux-High Trip Setpoints within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

2} Verify that the Quadrant Power Tilt Ratio is within its limit within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> after exceeding the limit or reduce Thermal Power to less than 50% of Rated Thermal Power,within the next 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> and reduce the Power Range Neutron Flux-High Trip setpoints to < 55%

of Rated Thermal Power within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

3) Identify and cor-rect the cause of the out of limit condition prior to increasing Thermal Power; subsequent Power Operation above 50% of Rated Thermal power may proceed provided that the Quadrant Power Tilt Ratio is veri-

. fied within its limit at least once per hour for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br /> or until verified acceptable at 95% or greater Rated Thermal Power.n Within 2 hours2.314815e-5 days <br />5.555556e-4 hours <br />3.306878e-6 weeks <br />7.61e-7 months <br /> 15 minutes, the QPT ratio had decreased to less than

.1.02.

Quadrant Power Tilt Ratio calculation continued for 12 hours1.388889e-4 days <br />0.00333 hours <br />1.984127e-5 weeks <br />4.566e-6 months <br />.

LER 78-43/03L CORRECTIVE ACTION:

This type of event is considered normal following large load reductions and no further action is planned.

FAILURE DATA:

N/A Prepared by T. L. Spencer

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Manader ~Salem Generating Stat~

SORC Meeting No.

51-78

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NRC FOAM 366 J7*Z7l~--

U.S. NUCLEAR REGULATURY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK:._I _..____.__......___.._......... _1 G) 1 6

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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7 8 I N I J I s I G I s I 1 101 o I o I - I o I o I o I o I o I - I o I o 101 4 I 1 I 1 I 1 I i 101 I I G) 9 LICENSEE CODE 14 15 LICSNSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58 CON'T CITTI 7

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~~~~~~ LlJ© I o I 5 I o I o I o I 2 I 7 I 2 101 o I s I o I s l_]J__gJ@ I a I a I 2 I 4 I 1 I a 10 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 RE?ORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

(())] I At *0730 hours, following a 45% load reduction quadrant tilt ratio was determined to be 1.03.

Action Statement for LCO 3.2.4.a.2 was implemented.

Action Statement was terminated at 0945 hours0.0109 days <br />0.263 hours <br />0.00156 weeks <br />3.595725e-4 months <br />, when subsequent hourly calculations showed QPT < 1.02.

This is the fifth

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occurrence of this type.

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SYSTEM

CAUSE

CAUSE COMP.

VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SU6COOE lzlzl@ W@ W@ lzlzlz1z1z1z1@ W L£J@

9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT LEA'RO c-VENTYEAA REPOATNO.

CODE TYPE REPORT I 7 I 81 I I I 0 I 4 I 31 I /I I 0 I 3 I LIJ NUMBE A 21,

22 23 24 26 27 2S 29 30 l=l 31 REVISION NC.

L..aJ 3:1 I

80 ACTION FUTURE EFFECT SHUTDOWN

~ ATTACHMENT NPR04 TAKEN ACTION

'ON PLANT METHOD HOURS ~ SUBMITTED FORM l;UB.

PRIME COMP.

SUP?LIER COMPONENT MANUFAC-:-URER W@W@ W@ W 101010101 W@

L£J@

33 34 35 36 37 40 41 42

~@ I z I 9 I 9 19 I@

CAUSE DESCRIPTION AND CORRECTlVE ACTIONS @

. 43 44 47 OJ)) I This occurrence was the result of. the 45% load reduction which resulted CIIIl in QPT ratio exceeding 1.02.

This is an expected occurrence and no IIIIl corrective action is planned.

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a s FACILITY

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STATUS

% POWER OTHER STATUS \\.:::;J [ill] w I 0 I 5 I 2 l@l.___ _ __,N

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1 a s 10 12 11 ACTIVITY CONTENT t:::;\\

f'IELEASED OF r:tEL.EASE AMOUNT OF ACTIVITY OJI] W@ W@I NIA 1

B 9

10 11, PEl'ISONNEL EXPOSUl'IES

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80 METHOD OF DISCOVERY OESCi'llPTION @

OISCOVERY I W@I QPT Ratio Calculation 44 45 46 80

'. LOCATION OF REL.EASE @

NL'.A 44 45 80 NUMBER

~TYPE

DESCRIPTION

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N __ /_A ____________________

1 a s 11 12 13 PERSONNEL INJURIES

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BO NUMBER OESCRIPTlON\\!2,;

D:fil I 0 I 0 I 0 l@.__ ___

_.:.:.N~A:.:.,_ ____________________ __.

1 a 9 11 i2 BO LOSS OF OR DAMAGE TO FACILITY '43\\

TYPE

DESCRIPTION

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(609)365-7000 Salen Ext.~

528 PHONE:

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