ML19031B510

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

ML19031B510
Person / Time
Site:	Salem
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)

Text

--* e PSEG Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 201 /622-7000 CE_.'.)

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Mr. Boyce H. Grier -<..:: .:::: CJ

-iC Director of USNRC CJ N rri  ::!

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631 Park Avenue King of Prussia, Pennsylvania 19406

Dear Mr. Grier:

LICENSE NO. DPR-70 DOCKET NO. 50-272 REPORTABLE OCCURRENCE 78-43/03L 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) 95*2001 300M 10-74

Report Number: 78-43/03L Report Date: 8/24/78 Occurrence Date: 8/8/78 Facility: 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 U.S. NUCLEAR REGULATURY COMMISSION J7*Z7l~--

LICENSEE EVENT REPORT CONTROL BLOCK: ._I_..____.__......___.._........._1 G) (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) 1 6

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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)

CODE 14 15 LICSNSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58 CON'T CITTI 7 8

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

(())] occurrence of this type.

[))II 7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SU6COOE

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@ REPORT I 7 I 81 I I I 0 I 4 I 31 I /I I0I 3I LIJ l=l L..aJ NUMBE A 21 , 22 23 24 26 27 2S 29 30 31 3:1 ACTION FUTURE EFFECT SHUTDOWN ~ ATTACHMENT NPR04 PRIME COMP. COMPONENT TAKEN ACTION 'ON PLANT METHOD HOURS ~ SUBMITTED FORM l;UB. SUP?LIER MANUFAC-:-URER W@W@ W@

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44 47 CAUSE DESCRIPTION AND CORRECTlVE ACTIONS @

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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OISCOVERY W@I 45 46 QPT Ratio Calculation DISCOVERY OESCi'llPTION 80 ACTIVITY CONTENT t:::;\

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NAMEOFPRE?ARER~~--T-.....---=L-..-*....;;s_o~e~n~c~e~r=---~-~~-- PHONE: (609)365-7000 Salen Ext.~

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