05000255/LER-1979-012, Forwards LER 79-012/03L-0

Forwards LER 79-012/03L-0

ML18043A602
Person / Time
Site:	Palisades
Issue date:	04/03/1979
From:	Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.)
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML18043A603	List: 05000255/LER-1979-012, Forwards LER 79-012/03L-0 05000255/LER-1979-012-03, /03L-0 on 790201:during Normal Plant Operation, Primary Coolant Pump Inadvertantly Stopped.Reactor Immediately Tripped.Shutdown Margin Was Less than Specified in Tech Specs.Power Conversion Sys Was Emergency Borated
References
NUDOCS 7904100295
Download: ML18043A602 (2)

LER-1979-012, Forwards LER 79-012/03L-0

Event date:
Report date:
2551979012R00 - NRC Website

text

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consumers Power company General Offices: 21:2 West Michigan Avenue, Jackson, Michigan 49~

• Area Code 517 788-0550 April 3, 1919 Mr James G Keppler Office of Inspection and Enforcement Region III U S Nuclear Regulator/ Commission 199 Roosevelt Road Glen Ellyn, IL 60131 LOCKET 50-255 -

LICENSE DPR PALISADES PLANT REPORT 19-012 LICENSEE EVENT On the reverse side is LER 19-012 which is reportable under Technical Specifi-cation 6.9.2.b.(2).

David P Hoffman (Signed)

David P Hoffman Assistant Nuclear Licensing Administrator CC:

Director, Office of Nuclear Reactor Regulation Director, Office of Inspection and Enforcement 790410 0 ). '15

.. _ I Palisades NRC FOAM 366 C7-ni U.S. NUCLEAR REGULATORY COMMISSION LICENSEE EVENT REPORT CONTROL BLOCK: !--1 _...__.__..__.......___._I G) 1 6

(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

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8 I M Ir IP IA IL I l l@I o I o I-I o I o Io I o 10 9

LICENSEE COOE 14

,5 LICENSE NUMBER 1-Io 10 101 411 1111 11101 I 10 25 26 LICENSE TYPE JO 57 CAT 58 CON'T [ili]

7 8

~~~~~~1015101010121515IG)IO1210111719(V!014 I0! 3!7191G) 60 61 COCKET NUMBER 68 69 EVENT CATE

- 74 75 REPORT CATe 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

I During normal nlant oneration, a Primary coolant nunm was inadvertantly

[]IIJ I stopped.

The reactor immediately tripped.

The shutdown margin at the

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I time of the triu was 3.08%.

This is less than the requirement of TS [Q]I] I 3.10.lB, which specifies a S/D margin of 3.75% when three PCPs are in [QJ]J I operation.

The PCS was emergency borated to increase the S/D margin.

[£TIJ I Event reportable per TS 6.9.2.b(2).

No hazard to public health or safety

[§))] I existed.

Condition was discovered on 3/9/79.

7 8 9 s6~~~M ctigi s3~JBE COMPON.ENT CODE su~~~riE rITIJ 7

8 LR I B I@ Lx.J@ ~@) I z I z I z I Zl z I z I@ [U@

9 10 11 12 13 18 19 SEQUENTIAL OCCURRENCE REPORT REPORT NO.

CODE

. TYPE VALVE SUBCOOE

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20 C\\ LEA/RO LVENTYEAR

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REPORT l 7 19 I NUMBER 21 22 l.=J 10 111 21 1.,..,..1 1o13 I

~ l.=J 23 24 26 2 7

<a 29 JO J 1 REVISION I

80 ACTION FUTURE EFFECT SHUTCOWN

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ATTACHMENT NPR~

PRIME COMP.

TAKEN ACTION ON PLANT MeTHOD HOURS ~ SUBMITTED FORM ~US.

SUPPLIER COMPONENT MANUFACTURER Lx..l@~@ W@ W Io 10 Io I 01 ll!J@ I NI@)

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J3 J4 JS J6 J7 40 41 42 4J CAUSE DESCRIPTION AND CORREC"rlVE ACTIONS @

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44 47 I The control rods have sufficient worth to nrovide S/D margin for 4-PCP ITTIJ I oneration (2%).

During 3-PCP OPeration, injection of boron is necesse.ry IJJI] I to ensure the additional S/D margin.

Therefore, a PCP trip from 4-loop IJJI] I operation will momentarily result in our exceeding the Tech Spec limits (IITJ I for 3-loop operation.

This" is an unavoidable phenomenon.

No further 1

a F!dtR-~recti ve action is necessa~_.

METJ-ioo OF STATUS

% POWER OTHER STATUS ~ DISCOVERY [2.TIJ LEJ@ 10 I 01 Ol@I N/A I ~@I._-----------------!

80 Review DISCOVERY DESCRIPTION @

7 8

9 10 12 lJ 44 45

<a ACTIVITY CONTENT C\\

[Qif rzY@r jtLE1@1 A~~/A OF ACTIVITY ~

7 8

9 10 11 44 45 80 N/A LOCATION OF RELEASE @

80 PERSONNEL EXPOSURES r:;;:;.,

NUMBER

(.;':;\\TYPE(.;';;\\ OESCRl710N ~

ITI:2J l 0 I 0 I 0 1'8~~~-N_A _______________________ ----'

7 8

9 11 12 13 PSRSONNEL INJURIES

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NUMBER OESCRIPTION 41 [QI] I OIO I Ol@)~--'/--r~/_A _____________________

- J 7

8 9

11 12 LOSS O* OR DAMAGE TO FACILITY f.i3\\

TYPE OESCRIPTION

'.;:::J ITliJ UJ@

NI A 80 80 B

9 10 80 PUBLICITY

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ISSl.JSDC,;\\ CESCrllPTION ~Tlf/A ITTIJ L!:Jei l

NRC USE ONLY I I I I I I I I I I I I I 1

a s 10 68 69 80

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