ML17252B560

LER 78-036/03L-0 for Dresden, Unit 2 Re Correction to a Typographical Error in the Attachment to the Original Report

ML17252B560
Person / Time
Site:	Dresden
Issue date:	07/28/1978
From:	Stephenson B Commonwealth Edison Co
To:	James Keppler NRC/RGN-III
References
BBS LTR 1085-78 LER 78-036/03L-0
Download: ML17252B560 (5)

Text

e Comm9'ealth Edison Dresden Nuclear Power Station R.R. #1 Morris, Illinois 60450 .<.

Telephone 81.5/942-2920 BBS LTR 111085-78 ,, ,.(:'

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~~~~

c":*c:s J~mes G. Keppler, Regional Director ri-i-*

... (.I)~:~

Directorate of Regulatory Operations - Region III  ;::: ::-0 U.S. Nuclear Regulatory CommissioI).  :!:~

-iC.::

799 Roosevelt Road co --l Glen Ellyn, IL 60137 r----*\

Licensee Event Report II 78-036/03L-0, Docket II 050~ is her*:by resubmitted to your off ice to correct a typographical error i:n the Attachment to the original report. The applicable sentence i:n the Attachment should have read failure of .the fuse was probably1 caused by a dirty relay contact or by deterioration of the fuse". No other changes have been made' in the report. This event was reported to your off ice under Dresden Nuclear Power Station Technical Specif ica-tion~:6. 6. B. 2. (b), conditions leading to operation in a degraded mode permitted by a limiting condition for. operation or plant shut:<fown required by a limiting condition.for operation *

• St phenson Station Superintendertt Dresden Nuclear Power Station Enclosure cc; Director of Inspection & Enforcement Director of Management Information & Program Control File/NRC JUL 2 8 1978 0 0 l' Afej*' \'

I

'rr-m LICENSEE EVENT REPORT

, CONTROL BLOCK: .__~_....._!. ....

., ____.__ _.____,j Q (PLEASE PRINT . V P E ALL REQU,RED INFORMATION).

"[~~Ef I I I LI DI R I s I 2 101 0 I 0 I - I 0 I 0 I 0 I 0 I 0 I - I 0 I 0 1014 I 1 I 1 I 1 I 1 101 I ., 0 7 8 9 LICENSEE CODE 14 15 LICENSE NUMBER . 25 26 LICENSE TYPE JO 57 CAT SB CON'T

"[IE]  :~~~~~ L!'.J©I o I s I o I o Io I 2 I 3 I 1 101 o I 6 Io Is I 1 I s '(D[_Q_J_1 I a I s I 1 Is IG) 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE i4 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES@

CQ::ill I On June 5, 1978, while Unit 2 and 3 were in normal operation, 1tA 1 _SBGT failed to

[£ID st."'* _ up_,n auto initiation from a spurious reactor bldg. Hi Rad signal. 'B' SBGT

[QB I auto started sud::essfully. A tubing in the flow .control panel was found broken. The

[QJ}] flow control damper was left wide open until. new tubing could be obtained. On

~ June 9, 1978, 'A' SBGT again failed to start upon auto initiation and 'B' SBGT auto

~ I started. Since the redundant system was available the safety significance of these

[9J]J I events was minimal.* This event is not repetitive.

7 8 9 80 SYSTEM CAUSE CAUSE COMP. VALVE CODE COLlE SUBCODE COMPONENT CODE SUB CODE SUBCODE

• ~ I s1 cl@ ~@ ~@ 11 IN 1s IT IR 1u 1@ ~@) ~@

7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION

@ REPORT NO. CODE TYPE NO.

LER'RO LVENT YEAR REPORT NUMBER I I I 21 7 8 22 l==.l 23 lo 13 I 6 I 24 26

'~'

27 lo I 3 I 28 29 w

30 -: JI l=1 l9_J 32 ACTION FUTURE EFFECT SHUTOOWN r.;:::i ATTACHMENT NPRD-4 PRIME COMP. COMPONENT TAKEN ACTION ON PLANT METHOD .HOURS ~ SUBMITTED FORM !>US. SUl'PLI ;:R t.IAt-IUFACTURER

• W@W@

33 J4 W@

JS W

JG lo lo lo lo 40I LU@

J7 41 LU@

42 Lu@ Ii I 9 I 9 19 I 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS @

I After the second failure a blown fuse was found which tripped the train on. auto start* I It was replaced and the train was auto started and ran successfully. Apparently the Ii first failure was also caused by this blown fuse. Because of the singularity of l

1 IT.ill I ITEJ8 this event no fut:ure corrective action is deemed necessary. __J 7 9 80 FACILITY METHOD OF . (.:;::;\

STATUS %POWER OTHER STATUS DISCOVERY DISCOVERY OESCRIPTION ~

l2EJ LU@ I 0 I 8 I 6 l@I U3 8 ') 10 12 11 at 55% ~~~l~_O_p_e_r_a_t_i_o_n_a_l~E_v_e_n_t______~--~--'

44 4S 46 80 ACTIVITY CONTENT Q\

RELEASED OF RELEASE AMOUNT OF ACTIVITY '2_V LOCATION OF RELEASE@

~ IBJ @) W~' ~NA--=----------'44 NA

~

7 8 9 10 11 45 80

• PERSOWvEL EXPOSURES r1u1,1BER A TYPE DESCRIPTION@

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I a loJl.EJ@

11 12 NA 1~3-----='-'=-----------------------------------'

PERSOllNEL INJUntES 80 l~Uf\t.BER DESCnlPTION@

[Q3J8 I9 0 I 0 I 0 11I@. ~12:------_.;:.:=-=-----------------------------------S.;..JO NA LO~:; or OR D/\r..IAGE TO FACILITY Q TYPE OESCfHPTION .* ~

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PUOL!CITY so 1~.~uco0,oescn1Pr10N@ NRC USE ONL y

~~~~0 --~N~A~--------------------~ 6B 11/1111 69 II I I I~

80*;;

NAME OF PREPARER _ _ _ _ J_o_e_C_l_la_n

____________ 265 PHONE:_.___. _ _ _ _ _ _ _ _ ___;__

0 0.

ATTACHMENT TO LICENSEE EVENT:REPORT 78..;,036/031.-0 COMMONWEALTH EDISON COMPANY. (CWE)

'DRESDEN UNIT..;,2 (TLDRS~2)

DOCKET* /1 050.,.:.237 On June 5 ~ 1978 during normal plant operation, A *SBGT system failed

'to start upon auto initiation from a spurious Reactor Building ventilation radiation* monitor* trip i * "B"

• train auto started when the

."A" train failed to supply the required flow rate. "B tra*in operated fo:r 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br /> which proved its operability as requ~red by Tech. Spec:

4.7.B.l.a.

It was determined that the flow through the "An tratn was low because the blower suction valve was. slow to open, An investigation revealed that a piece of tubing in *the flow control panel was broken causing the valve to open slowly. The "A" train blower suction vah,re was manually placed in the full..open position and the "A" train was declared operable after it was manually started and run successfully for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />.

The valve will be left in the full open position until replacement tubing can be obtained and installed, Since the redundant train auto started and ran successfuliy, the safety significance of thd.s event is minima.I.

On June 9, 1978, the "A" SB(;T failed to start*againupon auto initiation when the Unit 3 irn'!trument bus was deenergized. B" SBGT auto::_sta:rted and ran successfully for 10 hours1.157407e-4 days <br />0.00278 hours <br />1.653439e-5 weeks <br />3.805e-6 months <br />. It was then found that .a fuse in the heater operation sensing circuit was blown which prevented the auto start of the train, The train is designed to trip upon auto start if the heater fails to operate, but is not tripped upon manual start by this fuse *failure, The fuse was replaced and the train was auto started and ran successfully. The failure of the' fuse was probably caused by a dirty relay contact or by deterioration of the fuse. The relay contact was cleaned and properly adjusted, The fuse is manufactured by BUSS.

Apparently both.failures were due to the blown fuse, Because*of the

.singular nature of this event no further corrective action is deemed necessary,

..*.***@ DEV~.ATION REPORT

. Commonwealth* Edison PART1(TITLE OF DEVIATION 11 11

• D~R NO.STA D- 12 -

UNIT 2 -

YEAR 78 -

NO~

6~* I OCCURRED 6/5/78 0230 2/3 A S.B.G.1 .S DATE TIM:

SYSTEM AFFECTED PLANT CONDITl°ljJ_? TEST! NG 2 2191 691 D IBZJ, Standby Gas Treatment 7500 MODE RUN U-3 PWR(MWT) 1421 LOAD(MWE) 443 YES NO DESCRIPTION OF EVENT 2/3 A s.B.G. fail~e~d-"'to""--'s~t~a~r~t~i~*n~p~r~i~*m~a~r~y~.,__~2~/~3:_::B:_::s~t~a~r~t~e~d-=in=-~s~ta=n=d=b~y~.~~--~~~~~~~~~~~~

DESCRIPTION OF CAUSE Suspect inlet damper 2/3-7505 'K' did not open in required time to allow proper flow.

OT~ER APPLICABLE INFORMATlbN Started 2/3 "A" S.B.G manually & 2/3 7505 'N'valve very slow opening: Commenced DOS7500-2 2/3B

~~r. nnPr'-'1-,; l i rv (1 OHR RUN)

EQUIPMENT I XX! YES DR NO. WR NO.

FAILURE CJNO NA 4691 H.R. Whitehead 6/ 5/78

. RESP_ONSIBLE SUPE'RVISOR . DATE PART 2 OPERATING ENGINEERS COMME:NTS B SBGT train proven operable per tech spec. Investigation in progress as to cause SAFETY-TYPE OF CEVIATION EVENT OF POTENTIAL TECH SPEC NON-REPORTABLE ANNUAL RELATED REPORTABLE OCCURRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPORTING WR ISSUED D 14 DAY D 10CFR2 I YES 0 YES Ci]

GJ .,0v DAY NOTIFICATION 6.6.B.2.b D D .. D NO D NO D REPORTABLE CCCURRENCE ACTION ITEM NO. PROMPT ON-SITE NOTIFIC.l1TIC,;.;

NUMBER A. Roberts Assist *supt 6/5/78 1600 50- 78 031-0 TITLE DATE TIME NA NA TITLE DATE TIME 24-HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION DTPH Nti. F.A. Palmer 6/8/78 1020

• REGION I I I DATE TIME TITLE DATE TIME DTGM l\T A J.R. Gilliom 6/808. 1020 REGION 11 I & DOL CATE TIME TITLE DATE TIME RESPONSIBLE COMPANY OFFICER INFORMED OF 10CFR21 CONDITIO'lS AND THE! R REPORT TO NRC 1 IME REJIEW AND COMPLETED ACCEPTANCE BY ~TAT!~, REVIEW AS REQUIRED DATE RESOLUTION APPROVED AND AUTHORIZED FOR DISTRIBUTION 1/toha DATE 1

• • • 77 <.FORM 1S*sz*t)

• e

• *commonwealth Edison

• DEVIATION RE"PORI DVR NO.

D-STA UNIT YEAR 12 -

NO.

2 . 71 . .

~

PART 11 Tl TLE OF DEVIATION OCCURRED 6/9/78 0811.

'A' Standby Gas Treatment Train DATE TIM:

SYSTEM AFFECTED PLANT CONDITIONS TESTING Standby Gas Treatment 7500 D ~

MODE RUN PWR(MWT) 2060 LOAD (MWE) 677 YES NO DESCRIPTION OF EVEN:

W~en U3 Rx scrammed, A standby gas treatment train auto started - it tripped & B train auto started ..

• DESCRIPTION OF CAUSE Cause of trip unknown - may not have gotten flow up in time.

OT~ER APPLICABLE INFORMATlbN Tmmedjately performed JO hour s1irveil1ance run on "B" SGTS train_to demonstrate operability.

EQUIPMENT WW YES DR NO. WR NO.

Victor B. Rockovski 6/9/78 FAILURE ONO NA 4839 RESPONSIBLE SUPl'RVISOR DATE PART 2 I OPERATING ENGINEERS COMMENTS "B" SGTS train evailable to rpovide containment boundary for the reactor building as designed Train wj 11 be tested dai 1 y for 7 days or untj 1 the return of "A" train to service SAFETY-TYPE OF DEVIATION EVENT OF POTENTIAL TECH SPEC NON-REPORTABLE ANNUAL RELATED REPORTABLE OCCURRENCE PUBLIC INTEREST VIOLATION OCCURRENCE REPORTING WR ISSUED D 14 DAY D 10CFR2 l YES GJ YES GJ W 30 DAY NOTIFICATION 6.6.B.2.6 D D D NO D NO D REPORTABLE CCCURRENCE ACTION ITEM N0. PROMPT ON-SITE NOTIFICATION NUMBER B.R. Shelton for B.B.S. .6/9/78 0830 5 o- Tl TLE DATE TIME 78 ~ 36 - 03L-0 NA NA TITLE DATE TIME 24-HOUR NRC NOTIFICATION PROMPT OFF-SITE NOTIFICATION DTPH NA F.A. Palmer 6Ll2L78 1410

.REGION I I I. DATE TIME Tl TLE DATE TIME DTGM Nt. .! I Gilliom* 6L 1208 1410 REGION I I I & COL CATE TIME TITLE DATE TIME RESPONSIBLE COMPANY OFF! CER INFORMED OF 10CFR21 CONDITIONS AND THE! r1 REPORT TO NRC . TITL_b DATE R.M. Ragan'"\2:"'~;f2s..~~ . ~6-L_l_2_/7-8~~~~~-

RE /I EW AND COMPLETED oPERATING ENGINEER ~ DATE ACCEPTANCE BY ~TATIG, REVIEW AS REOU I RED I

DATE RESOLUTION APPROVED AND AUTHORIZED FOR DISTRIBUTION* SUPERINTENDENT 7/Joha DATE 10* 77 I.FORM' IS* *;z- ti