05000272/LER-2078-041-03, Excessive Quadrant Power Tilt Ratio During Power Escalation

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Excessive Quadrant Power Tilt Ratio During Power Escalation
ML19031A895
Person / Time
Site: Salem  PSEG icon.png
Issue date: 08/14/1978
From: Librizzi F
Public Service Electric & Gas Co
To: Grier B
NRC/IE, NRC Region 1
References
LER 1978-041-03
Download: ML19031A895 (4)
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LER-2078-041, Excessive Quadrant Power Tilt Ratio During Power Escalation
Event date:
Report date:
2722078041R03 - NRC Website
v • d • e

text

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REGULATORY DOCl\\ET FILE COPY Public Service Electric and Gas Company 80 Park Place Newark, N.J. 07101 Phone 2011622-7000 Mr. Boyce H. Grier Director of USNRC August 14, 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 78-41/03L

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-..:*1 Pursuant to the requirements of Salem Generating Station Unit No. 1 Technical Specifications, Section 6.9.1.9.b, we are supmitting Licensee Event Report for Reportable Occurrence 78-41/03L.

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

Sincerely yours, J~

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)

The Energy People r'

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  • Report Number:

Report Date:

Occurrence Date:

  • -41/03L 8-14-78 8/1/78 Facility:

Salem Generating Station Public Service Electric & Gas Company Hancocks Bridge, New Jersey 08038 IDENTIFICATION OF OCCURRENCE:

Quadrant P6wer Tilt Ratio Greater Thari 1.02.

CONDITIONS PRIOR TO OCCURRENCE:

Operational Mode 1, Reactor Power 50%,. Increasing Power at 5%/hour.

DESCRIPTION OF OCCURRENCE:.

At 1115 hours0.0129 days <br />0.31 hours <br />0.00184 weeks <br />4.242575e-4 months <br /> during a power escalation to 100% following a 50% load reduction, Quadrant Power Tilt Ratio was determined to be 1.027.

This being greater than the 1.02 allowed by Technical Specification 3.2.4 required the implementation of Action Statement "a".

Power escalation continued and the QPT ratio* was recalculated at 1205 hours0.0139 days <br />0.335 hours <br />0.00199 weeks <br />4.585025e-4 months <br />.

Quadrant Power Tilt Ratio had decreased to 1.018.

Action.Statement "a" for LCO 3.2.4 was terminated.

DESIGNATION OF APPARENT CAUSE OF OCCURRENCE:

The cause of this occurrence was the power escalation at 5%/hour following a large load reduction.

This type of occurrence is con-sidered normal during power escalations a~d no further action is planned.

ANALYSIS OF OCCURRENCE:

Technical Specification 3.2.4 states that with the Quadrant Power Tilt Ratio determined to exceed 1.02 but less than or equal to 1.09, 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 QPT ratio to within its limits, or reduce thermal power at least 3% from rated thermal power for each.

1% of indicated Quadr~nt P6wer Tilt Ratio in excess of 1.0 and similarly reduce the power range neutron flux high setpoints within the next 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />.

Identify and correct 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 verified to be within its limits at least once per hour f6r 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 gr~ater rated thermal power.

The QPT ratio was recalculated and shown -to be within its limit within one hour.

LER 78-41/03L 'CORRECTIVE ACTION:

This type of occurrence is considered normal during power escalations.

It has been demonstrated that a rate of 5% per hour can produce a QPT ratio of greater than 1.02.

FAILURE DATA:

N/A Prepared by ____ T __

L_. __

S~p~e~n_c_;;_e_r ________ _

SORC Meeting No.

50-78 Manager -

Salem Generating Stati

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LICENSEE EVENT REPORT CONTROL BLOCK: I I e IQ (PLEASE PRINT OR.e ALL REQUIRED INFORMATION)

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6 L§JI). IN IJ Is I G Is I 1 101 o I o I - Io Io I o I o I o I - I o I o 10)14 I 1 I 1 l.1 I 1101 I 10 7

a 9 1.ICENSE!: CODE.

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15 l.ICENSE NUMBER 25 26 1.ICENSE TYPE JO 57 CAT 58 CON'T ITTTl 7

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~~~~! LlJ© I o I s I o I o I o I 2 I 7 I 2 101 o I a ! o I l I 1-1 a I© I -o I a I 1 I 4 I 7 1 a I G) 60 61 COCKET NUMBER 68 69 EVENT CATE 74 75 REPORT CATE 80 EVENT OESC.RIPTION ANO PROBABLE CONSEQUENCES@)

I At 1115 hours0.0129 days <br />0.31 hours <br />0.00184 weeks <br />4.242575e-4 months <br /> during a power escalation to 100% Quadrant Power Tilt

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Ratio was determined to be 1.. 027.

Action Statement "a" for LCO 3~2.4

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[))3J was implemented.

At 1205 hours0.0139 days <br />0.335 hours <br />0.00199 weeks <br />4.585025e-4 months <br />, QPT was reduced to less than 1.02

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and Action Statement "a" for LCO 3.2.4 was terminated.

This is the

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fourth occurrence of this type.

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SYSTEM cooE IZ I z I@

9 10 t::;\\ l.ER'RO CVENT VE.AA

\\:...:,) REPORT I 7 I 8 I NUMBER 21.

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CAUSE

CAUSE COMP.

VAi.VE cooE suBcooE COMPONENT cooE suBcOcE suBcooE w@ w@ I z I z I z I z I z I z 1e L!...J@) w@

11 12 13 18 19 20 SEQUENTIAi.

OCCURRENCE REPORT REPORT NO.

COOE TYPE I I I o 14 11 I I/I I o I 3 I LIJ L=J 23 24 26 27 28 29 JO 31 ACTION FUTURE EFFECT SHUTCOWN

~ ATTACHMENT NPRD-4 PRIME COMP.

TAKEN ACTION ON Pl.ANT METHOO HOURS 1.;;J SUSMITTEO FOAM liU8.

SUPPi.i EA l..!J@W@ W@ W I 01010 I Ol LYJ@

l.!Ll(§ W 33 34 35 36 37 40 41 42 43 CAUSE DESCRIPTION ANO CORRECTIVE ACTIONS @

REVISION NC. w 32 COMPONENT MANUFACTURER 80 I z 1*9 I 9 I 9 I@

44 47 o:::I]J I This occurr~nce was the result of power escalation rate and is considere~

(((I] normal.

Escalation rate was reduced and QPT ratio returned to less o::m I than 1~02.

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FACll.ITY l3Q'I STATUS

% POWER OTHER STATUS \\::.:::;

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9 10 12 1l ACTIVITY

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REl.EASEO OF RELEASE AMOUNT OF ACTIVITY ~

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10 11 80 METHOO OF OISCOVERY OESCRIP'TION @ -

OISCOVERV I ~@I QPT Ratio Calculation 44 45 46 80 0

LOCATION OF REl.EASc@)

NLA 44 45 80 PERSONNEL EXPOSURES t:;;;\\

NUMBER

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, 1 12 13 PERSONNEL INJURIES

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9 11 12 l.OSS OF OR OAMAGE TO FACll.ITY ~

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PHONE: (609)365-7000 Salen Ext.~

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