05000237/LER-1979-025, Forwards LER 79-025/03L-0

Forwards LER 79-025/03L-0

ML17173A838
Person / Time
Site:	Dresden
Issue date:	05/24/1979
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A839	List: 05000237/LER-1979-025, Forwards LER 79-025/03L-0
References
79-417, NUDOCS 7905300485
Download: ML17173A838 (3)

LER-1979-025, Forwards LER 79-025/03L-0

Event date:
Report date:
2371979025R00 - NRC Website

text

j ---o;. ~mr&nwealth9son Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 Telephone 815/942-2920 BBS ~TR 117 %417 May 24, 1979 James G. Keppler, Regional Director:~;~

Directorate of Regula~ory Operations - Region III U.S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137 Reportable Occurrence Report; 1179-25/031-0, Docket 11050'-237 is hereby submitted to ybur office in accordance with Dresden Nuclear Power Station Technical Specificat16n 6.6.B.2.(b),

conditions leading to operation in a degraded mode permitted.

by a limiting ~ondition for operation or plant-shutdown re-quired by a limiting conditio~ for operation.

BBS:lcg En_closure ephenson Station Superintendent Dresden Nuclear Power Station cc:

Director of inspection & Enforcement Director of Management*-Information & Erogram Control File/NRC

.\\Y 2 91979

~. e

, Commonwealth Edison DEVIATION REPORT Ov NO.

STA UNIT YEAR NO.

D -

12 -

2 -

79 -

44

~eART l(TITLE OF DEVIATION OCf!;!~~~79 1700 U2 Turb. 1st Stage Press. 45% Scram Bypass SYSTEM AFFECTED 590

PLANT CONDITIONS

Reactor Protection System

DESCRIPTION OF EVENT

Refuel MODE.

0 PWR (MWT)

, LOAD(MWE)

DATE TIME TESTING 0

GU CJ YES NO Found PS2-504C Channel "A" Logic and PS2-504D (Channel "B" Logic) to trip 10 PSI above Tech Spec limit (~400 PSI).

Tested each switch several times and trip points repeated at 410 PSI incr.

Station established limits 387 PSI +/- 5 PSI.

DESCRIPTION OF C~USE Unit shutdown, and switches at 0 PSI.Under this condition the bourdon tubes seem to "relax" (metal stress).

OTHER.APPLICABLE INFORMATION Reset switches to 389. PSI incr and 386 PSI incr respectively.

Verified repeatability.

EQUIPMENT UD YES FAILURE ONO DR NO.

N/A WR NO.

PART 2 I OPERATING ENGINEERS* COMMENTS N/A Alan R. Zapatocky 4/25/79 RESPO_NSIBLE SUPtRVISOR DATE All control rods fully inserted.

Rx mode switch-in refuel.

Redundant instrumentation was operable.

SAFETY-TYPE OF DEVIATION EVENT OF POTENTIAL TECH SPEC NON-REPORTABLE ANNUAL RELATED REPORTABLE OCCURRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPORT I NG WR ISSUED D 14 DAY D 10CFR21

~

30 DAY NOT I FI CATJ ON D

6.6.B.2. b REPORTABLE CCCURRENCE ACTION ITEM NO.

NUMBER XlGm 25 ---o3L-0 N/A 24-HOUR NRC NOTIFICATION DTPH N/A REGION I I I DATE TIME

• -oTGM N/A REGION I I I & DOL CATE TIME RESPONSIBLE COMPANY OFFICER INFORMED OF IOCFR21 CONDITIONS AND THEIR REPORT TO NBC ACCEPTANCE BY STATION REVIEW AS REOU I RED DATE RESOLUTION APPROVED AND AUTHORIZED FOR DISTRIBUTION 86*5176 10*77 (FORM 15*S2*t)

YES [!]

YES 0 D

D NO D NO 0 PROMPT ON-SITE NOTIFICATION B. B. Stephenson 5/11/79 TITLE DATE TIME N/A TITLE DATE TIME PROMPT OFF-SITE NOTIFICATION F. A. Palmer 5/11/79 11:24 Tl TLE s?1Alh9 TIME J. R. Gilliom 11 :24 TITLE DATE TIME TITLE DATE TIME

__ John W. Wujciga ~~-J+-i

~fa-1/ry PE RAT I NG ENG I DATE

'l.'rtl!l\\l~!!t!~Y ?t~Y

• ~* -*~~TROL BLOCK: I. **; "'* I I~

(PLEASE PRINT OR TYPE AL.UIRED INFORMATION) rn,

I, L, D, R 1 s, 2 101 o 1 o 1 _, o 1 o 1 o 1 o, o 1 _, o, o 101 4 1 1, 1, 1, 1 101 1

, cv 7

8 9

LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE JO 57 CAT 58

.COf)l:T *

. l:2EJ

~~~~~ L!:JG) I o I s I o I o I o I 2 I 3 11 IGJ o I 4 I 2 I s I 1 I 9 I© I o I 5 I 2 I 4 I 1 I 9 I G) 7

8. ---* 60----- --61 *--...

DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE BO EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

I While performing monthly surveillance DIS 500-7 ~ PS 504C and Ps* 504D tripped at 410 PSif TIT.TI I Tech Spec 3.1.1 requires tr{p at first st~ge turbine pressure less than that at 45%

[ill].

~

1rated steam flow (400 psi).

Safety implicati~ns minimal since unit shutdown for re-

[Q))J* -1 fueling during month.

Simil~r event ref~* in RO /178-29-03L-0.

[ill]

. [IT?]

(())]

7 8 9 rrm*

1 a*.

SYSTEM CODE I I I A I@

9 10 '.

@ LEA/RO LVENT YEAR 17 REPORT I 7 I 9 I NUMBER 21 22

CAUSE

CODE w@

11 l.=.I

• 23

CAUSE

COMP.

SUBCODE COMPONENT CODE SUBCODE LIJ@ IIINlslrlRlul@ UJ@

12 13 18 19

. SEQUENTIAL OCCURRENCE*

REPORT REPORT NO.

CODE TYPE I o I 21 s 1 171 Io I 3 I L!J 24 26 27 28 29 30 VALVE SUB CODE Lz.J@

20 L=J 31 REVISION NO.

l.Q_J 32 80

. *. ACTION FUTURE EFFECT

.SHUTDOWN t:;:;...

ATTACHMENT NPAD-4 PRIME COMP.

COMPONENT TAKEN ACTION ON PLANT METHOD HOURS ~ SUBMITTED FOAM :>UB.

SUPPLIER MANUFACTURER l!J@LJJ@ UJ@ UJ I 0 I 01 01 01

~@) ~@ W IB 10 16 19 I 33 34

. 35 36 37 40 41 42 43 44 47

.CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

lJ))]. I Cause attributable to instrument drift during prolonged shutdown period. *.PS 2-504C &*** *

((OJ !PS 2-504D reset *t.o.389 psi and 386 psi incr¢!'lsfng, respectiv~]y, and repeat_abiU.,.,ty"-----'

ITm !verified.

Switches will continue to. be* tested monthly per DIS 500-7.

.. CTIIJ [ill]

7 8

9 80 FACILITY

• STATUS

% POWER

. DE] L!Ll@ I 01 ol ol@)l..__NA ___

OTHER STATUS METHOD OF

(:;:;\\

DISCOVERY DISCOVERY DESCRIPTION 0

~~~I _____

M_o_n~th_l_y.__S_u_rv_e_1~*1~1_a_n_c~e ____ __,

7..

• 8 9

10 12 1'3 ACTIVITY CONTENT

~

RELEASED OF RELEASE AMOUNT O.F ACTIVITY ~

~

L_ij@ UJ@l.._* __ N_A _____ ___.

7 8

9 10 11 44 45 46 LOCATION OF RELEASE @**

80

44.

45 NA BO.

PERSONNEL EXPOSURES r::;:;.,

.. NUMBER

. (.;:;\\TYPE

DESCRIPTION

"ITI2] I 0 I 0 I 0 lW@..... I _. _N_A ___ __,_ _ _..,... ________________ __,

7 8

9 11 12 13 80 PERSONNEL INJURIES

(;";\\

r r.-r::-1 I NIUMBE,R*

jCr::l[DESCRIPTION~

. -7 q 0 J 3 () 0 ~ Q °'

~0 0

0 ~~--*--*=NA;.;:_ _________

l_f _____

f_..;_f ____ __.

7 8

9 11 12 LOSS OF OR DAMAGE TO FACILITY 143' TYPE

DESCRIPTION

~

Eli) W@

NA 80 1

B 9

10 80 issu:~eu~:;CFllPTION@

NRC USE ON Ly ITliJ LNJ@'-----.u.Q...------....---------------J I I I I I I I I I I I I I ~

7 8

9 10 68 69 80* c;;

0 a.

<J John Dunbar NAME OF PREPARE~.~-~~~~~~~~~~--~-~

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