ML20011A412

Forwards LER 81-023/03L-0

ML20011A412
Person / Time
Site:	Dresden
Issue date:	10/01/1981
From:	Scott D COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20011A413	List: ML20011A412 ML20011A418
References
81-786, NUDOCS 8110130322
Download: ML20011A412 (1)

Text

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Commonwe:lth Edison Dreadsn Nucl4ar Power StItion

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\v - Morris, Illinois 60450 Telephone 815/942 2920

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October 1, 1981 DJS LTR #81-786 James G. Keppler, Regional Director Directorate of Regulatory Operations - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report #81-23/03L-0. Docket #050-249 is being oubmitted to your office in accordance with Dresden Nuclear Power Station Technical Specification 6.6.B.2.(a), reactor protection system or engineered safety feature instrument settings which are found to be les- conservative than those established by the technical speci-fications but which do not prevent the fulfillment of the functional requiremcnts of affected systems.

D un D J. Scott Station Superintendent g~ Q, ,

DresdenNuclearPowerS[2 tion -yj DJS:lg Enclosure .

Sg 8 cc: Director of Inspection & Enforcement ask Y Director of Management Information & Program ContrIk-U.S. NRC, Document Mgt. Branch ha j File /NRC \* m d

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'8110130322 811001 5 19Bg PDR ADOCK 05000249 s Poa OC3

NRC FORM 366 -

- U.S.NUCLEAM REtULATORY COMMISSION (7 77) '

4 LICENSEE EVENT REPORT CONTROL 1 LOCK: l 1

l  ! l l l 4

lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l0 l1l lI lL lD lR lS l3 [gl 0 l 0 l -l 0 l 0 l 0 l 0 l 0 l- l0 l0 [gl4 l1 l1l1l1[gl l lg 1 8 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58 CCN'T Ioi1I ERNl % l0l5l0l0l0l2l4l9 gl0l9l0l4l8l1 gl1l0l0l1l8l1lg 7 8 60 61 CoCKET NUM8ER 64 69 EVENT DATE 74 75 REPORT QATE 80 EVENT DESCRIPT!ON ANO PROSABLE CONSEQUENCES h I'o12I l During unit outage, while conducting the quarterly scram discharge volume continuous l lo lai l level monitor calibration check, the west bank / east transducer and east bank / east l l o l41 l transducer high-high level alarm tripped at 2.6 inches. Limit is less than or equal l loIsl l to 2.5 inches. This was of minimal safety significance since the scram function wu l lo Is l l not affected and Scram Discharge Instrument Volum } evel switches were operable. g g;7; g Public health and safety were not affected. First 7 turrence of this type.  ;

10181I l SoEE Yo$E sSci$E COMPCNENT CODE SUBCcDE S E lol9j '

7 8 lI lE l@ ]@ l G l@ l Il Nl Sl Tl Rl U l@ lS l@ l Zl@

9 10 11 12 13 18 19 20

,,,, SEcVENTIAL OCCURRENCE REPC*T REVISION LER/Ro EVENT vEAR REPORT NO. CODE TYPE No.

@Rg ,,,,. l218l1l 22 l-l 23 l0 l2 l3 l 24 26 l/l 27 l0l3l 28 29 lL l 33

[31-J l 0l 32 N AC O O PLANT ME HOURS 22 58 i POR 8. SU L MANUP RER _ .

lE 33 l@l34 Fl@ l357 l@ l Z lh 36 3l70 l0 l0 lU40l {g 41 l N lg 42 yg 43 lN l1 l9 l147lg-44 ~

CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h 11 101 l The cau;,e was instrument setpoint drift due to high ambient temperature in P.he i gl monitor cabinets. The setpoints were adjusted and calibrated to alarm at 2.4 inches I

,,,,,; increasing. Cooling units will be added to each monitor's cabinet toreducet$ehigh  ;

,,,3y[ ambient temperature. No further action required. l l i l41 l l (7 8 3 80 C '

( 's'T2E 'spowER oTNER STATUS hcisCcNRY oiscovERv oEsCRiPTicN @

'l1 15 l bh l 0 j 0 l 0 lgl N/A l lB [gl Routine Surveillance l A TivtTV CC TENT l RELEASE AMCUNT CP ACTIV!TY LOCATION OP RELEASE l l 1 l 6 l l z l @D OP RiLEASE[zj@l N/A l l N/A l 7 8 9 te 11 44 46 80 PERSONP E' EXPCSURES NUMBER TYPE DESCRIPTION l 1 l 7 l l 0 l 0 l 0 l@l Zl@l N/A l ,

PERseNNEL%ULs NUMBER 0EsCRiPTic~@

l 7l 1 l a l l 0 l 0 l 0 l@l N/A .

l 8 9 11 12 80

! LOSS OF CA OAMAGE TO PACIL!TV l TYPE CESCRIPTION

'7 l l 9 6l l9 z l@l10 N/A l._

80 t 1000 ED DE CRIPTION

• N/A lllllllllllllj il 2 i o ! l N l@l , l ,

l7 8 9 to 68 69 80. ;l ,'

l NAME Cc PREPAGER Sam Bader PHCNE:

(815) 942-2920 X-529 o S.

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