ML17173A892

Forwards LER 79-032/03L-0

ML17173A892
Person / Time
Site:	Dresden
Issue date:	05/30/1979
From:	Stephenson B COMMONWEALTH EDISON CO.
To:	James Keppler NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML17173A893	List: ML17173A892 ML19269D586
References
BBS-LTR-79-433, NUDOCS 7906050245
Download: ML17173A892 (3)

Text

Commonwe& Edison Dresden Nuclea;Wwer Station ,.

I/

R.R. #1 Morris, Illinois 60450

-Telephone 815/942-292(1 May 30, 1979 BBS LTR /179-433 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 #79-32/031-0, Docket #050-237 is hereby submitted* *to your office in _accordance wf°th Dresden Nuclear Power Station Techriical Specification 6.6.B.2.(b), condittons leading to operation in a degraded mode permitted by a limiting condition for operation or plant shutdown required by a limi~ing condition for oper?-

tion.

.t. fd. ~fo;;_

B. B. Stephenson "* '/'(/

Station Superintendent Dresden Nuclear Power.Station BBS:lcg

. *:.i Enclosure .. - ** '~' ' * *-* - * :. ..>:, * '

".'!r.

cc: Director of Inspection & Enforcement

• Director of Management Information & Program Control  :,. .. * *:; .,

File/NRG ., .~ *-:  ;* .* ._***~ ~

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• .' ' *.110/J_~

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• • *u >. * * *,' ."'"'"

_._,..,,*. *_ 1 ._* *, ~:~ * * *:..*

. .ucaJSEE EVENT REPORT L

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• irLEASE PRINT OR TYPE I REQUIRED 1N!'ORMATIONI I I I LID IR 1.-s.I 2-IG)lo I o I - lo Io Io Io Io 1- lo Io 1014 I i I 1 I 1.1 9 LICENSEE CODE 14 15 LICENSE NUMBER 25 26 LICENSE TYPE 1

30 10l *1 57 CAT 58 10 .

CON'T

[§]2J 1 . 8.

~~~~~; liJ© I o I s I o I o I o I 2 I 3 60 61 DOCKET NUMBER 11 101 o I sEVENT GB 69 10 I l I DATE 7 9 74 l©I 75 0 I 5 I 3 I 0 I 7 I9 REPORT DATE 80 10 EVENT DESCRIPTION AND PROBAB_LE <:;ONSEOUENCES@

[§TI] I IRM.' s 17 and 18 in the "A" trip system were found downscale during rod pulls to heat- I

[QJJ] I ing power. Since T.S.*Table 3.1.1 requires three operable instrument channels per J

[.QJJJ. I trip system, operator immediately initiated a manual.half-scram. Event had minimal I

~ safety significance since remaining two chann~ls in the iiAi' *.trip system were operable.

[QJTI I No effect on public health or safety.**

CITD

[))1]

7 8 9 80 SYSTEM CAUSE CAUSE

• COMP. VALVE CODE CODE SUBCODE . _: .* COMPONENT CODE . SUBCODE . SUBCODE IillJ 7 . 8*

I II Al@ w ~@. I i NI s I T I R I u I@ ~@. . LB@

9 10 11 12 13 18' 19 20.

SEQUENTIAL OCCURRENCE REPORT . REVISION LER/RO CVENT YEAR REPORT NO. CODE TYPE NO.

@ REPORT NUMBER I7 I9 I l=.I 10131 2 1 I/I 1°1 3 1 ~ *~

21 22 23 24 26 27 28 . 29 JO 31 32 ACTION FUTURE EFFECT SHUTDOWN r::;::;... ATTACHMENT NPRD*4 PRIME C.OMP *. COMPONENT.

TAKEr~ ACTION ON PLANT METHOD . HOURS *~ . SUBMITTED .FORM :;us. SUPPLIER* . MANUFACTURER LAJ@LU@

33 3*1 W@ .LU 35 JG 10

. 37 I ol 01 ol40 w@

41 W@

. 42 W@ I c I o Is Io *1@

43 44 . 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS@

• I IRM 17 failed because of a faulty connector' due to 'apparent minor damage during *re-

[IIJJ fueling. Connector was replaced and tested satisfactorily. IRM 18 had a loose input

• .CIIIJ preamp connector. It was tightened and the downxcale. alarm cleared. - This was. the .1':S.\::q

[ITIJ .__f_i_*r_s_t_o_c_c_u_r,....e_n_c....,e_*o_f_. _t_h,....i_s_t_y_p_e_o_*n_u_n_i_t_2_.*__I_RM_""s_w_i_*1_.1_**_c_o_n_t_i_n,....u_e_t__o_._-b_e_*_t_e_s_t_.e_d_m ___ o_n_t_h_l_y_*--"----'

[III] using surveillance DIS 700-4. . ..  : ~

7 8 9 FACILIT'f STATUS  % POWER OTHER STATUS

(.;()\ * .METHOD OF

~ *DISCOVERY

. * ..DISCOVERY DESCRIPTION

• 32

• 80 ITTIJ UJ@ I 0 I 0 I 0 l@I NA I ~@ I...._o~p_e_r_a_to_r_O_b_se_r_v_a_t_io_n_ _

• _._ _ _ _*.*_>_***_:*I *-.:

B ATIVITY cJ~TENT 12 l1 . * * * *

• 44 45 4 6

so*

RELEASED OF RELEASE

[QI] Ul@ W@.._I__N_A_ _ _ _ _ _ _ _I

. AMOUNT OF ACTIVITY @ LOCATION OF R~~E;A,SE @ ;.<. ~...... ':*~ .~* J__: _-.:_:

NA . ,,,_,

7 8 9 . 110 11 . 44 45 . BO

. PERSONNEL EXPOSURES . . *. *r:;;:., ..

• DESCillPTION

.*;_ *1 NUMOER A TYPE ~'

[.Q2] I 010 10J0~@.___*__ NA_ _ _ _ _ _ _ _ _ _*.*_.*._ ... _ _ _ _:_*- - " - - - - - - - - - - - *~*

8 9 11 12 . *. _13 ...... so*

PERSONNEL INJURIES (.;;\

• NUMBER DESCRIPTION6 ... ~

01 01 01@ .. : NA

.... , *. ~*-*

..8 9 11 12 . . . ,*  ;* *.". * .. ,*:* ........ *', 80 .. ***"

o'. ; 'J...LI ~*,:. := :_.: *s:; *: .. . ;:,

I .

. *. :i'* *:* LOSS OF OR DAMAGE TO FACILITY 143' .7*.* .9. o'.*'s*~o* *e:.*

~ TYPE (,;:;\DESCRIPTION .v:.::J ... . .,: -_**..::.:.-.: _, ... 7.~, ,,*. .* * .* *';(,

~ ~'3il .NA ... :. ,. . . ' : *_.* ': ... --~ . : ..,,_.: *,**:.::.:.... **.:.:'.:*:*.':I ..::1 1 ".' ..-.a. g . 10 . -. . .** *, ....._. .* .* ... * . *-*. .... . ,.. .

• 80 _. )*1

[tto"f r*~:r@r;iAIHl~N-~ -.'. ~~;*::>E~J~2:*;*:~t' *L~:~*:'. . ~:~.~./ ~~,*~:-~,~,5~~}.0~( . :,~.~~-*~': *. *.*: _. ~-~-/~:~_,:*--., ~ ,**;t I ~IR~ ~~~ ~T; <<*, , I :'i ~ -~ :~J

'lit:tf:ti~~0~%i~ff~~~f~:.!t:~:;:~=~.:::_~.°.'.~~:i~~ 2::. *~::::~:* ~ :'~~.;:~~tJ *.

DEVIATION REPORT DVR t-10.

._- Commonwealth Edison * *

• D-STA 12 -

UNIT YEAR 2 - 79- 5 N~ .. . ..

PART 11 TITLE OF DEVIATION OCCURRED 5-:1-79 2200 Unit 2 IRM 17 & 18 Downscale .DATE TIME SYSTEM AFFECTED 700 PLANT CONDITIONS TESTING Neutron Monitoring System - 0

CJ .m -

MODE* StartuE PWR (MWT) . : LOAD (MWE} *YES NO DESCRIPTION OF EVENT iRM's 17 & 18 both downscale during rod pull to heating power DESCRIPTION OF GAUSE

.Unknown at this time

' I' '::* * *-.:..~.'  :..: ,'.*.: ...

EQUIPMENT DD YES DR NO.

• WR NO.

FAILURE .

• CJNO . N/A 3174 Randall Black ** 5-1-79

~w;i..w.&J~_~R~ES-P~O~N~S~l~BL-E~SU_P_f-RV-l~S~O-R~~~-- DATE PART 2 I OPERATING ENGINEERS COMMENTS All control rods inserted and mode switch moved to refuel position. Manual half scram initiated immediately on Channel B.

SAFETY-TYPE OF DEVIATION EVENT OF POTENT I AL TECH SPEC "NON-REPORTABLE ANNUAL - . RELATED REPORTABLE OCCURRENCE PUBLIC INTEREST VIOLATION ,OCCURRENCE REPORT I NG : - WR ISSUED D 14 DAY D 10CFR21 ..

,D YES CB YES 5J

~ NOTIFICATION 30 DAY 6.6.B.2.b - D D NO D NO D - ..

~

. ~ .

REPORTABLE CCCURRENCE ACTION ITEM NQ. PROMPT ON-SITE NOTIFICATION . - .. '> ..

NUMBER * - S/15/79 .*. -~~:;,

A. Roberts - Asst. Supt. 1600

~::.:~

~- 79-32-03L--0 .. ..

• N/A TITLE DATE *- TIME _.. ,

N/A .. ,.. .{

... -- .. " .. - ~ ;:< .,

.,.. TITLE DA.TE ** *TIME 24-HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION .... -

DTPH NLA - -* F. .A. Palmer 5/16/79 . 10: 30

~

REGION I I I DATE TIME .. TITLE .. .. DATE- TLME - ).:

.. DTGM - - J. R. Gilliom .. . 5/16/79 10:30 NLA --

REGION 11 I Be DOL CATE TIME ... TITLE -- . DATE TIME.

~ -* ~,::-~ ..... . ' . ' . '

-~ .. : . _, .; ...  :

RESPONSIBLE* COMPANY OFFICER INFORMED OF 10CFR21 ND ONS AND THEIR REPORT TO C DATE TIME

. *. REVl EW AND COMPLETED :_ 5/10/.79 .:* . .

DATE