05000321/LER-1980-008-03, /03L-0:on 800115,during Steady State Power Operation,Secondary Containment Integrity Violated When Personnel Opened 164-ft Elevation Reactor Bldg & Turbine Bldg Airlock Doors Simultaneously.Procedure Revised

/03L-0:on 800115,during Steady State Power Operation,Secondary Containment Integrity Violated When Personnel Opened 164-ft Elevation Reactor Bldg & Turbine Bldg Airlock Doors Simultaneously.Procedure Revised

ML19260D030
Person / Time
Site:	Hatch
Issue date:	01/30/1980
From:	Coggin C GEORGIA POWER CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML19260D029	List: 05000321/LER-1980-008, Forwards LER 80-008/03L-0 05000321/LER-1980-008-03, /03L-0:on 800115,during Steady State Power Operation,Secondary Containment Integrity Violated When Personnel Opened 164-ft Elevation Reactor Bldg & Turbine Bldg Airlock Doors Simultaneously.Procedure Revised
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8002070273
Download: ML19260D030 (3)

LER-1980-008, /03L-0:on 800115,during Steady State Power Operation,Secondary Containment Integrity Violated When Personnel Opened 164-ft Elevation Reactor Bldg & Turbine Bldg Airlock Doors Simultaneously.Procedure Revised

Event date:
Report date:
3211980008R03 - NRC Website

text

U.S. NUCLEAR REGULATORY COW%StON NRC F.JRM 366 (7 7'/)

LICENSEE EVENT REPORT CONTROL BLOCK: l l

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l l lh (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) l 6

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LICENSE NUYWEH JS 26 LICENSE TYPE JO ST LAi Sd i

7 8 9 LICEN5EE CODE le 15 Scn%lLl@l 0l5l0l010l3l2l1 )@l 0 l1 l1151810 l@l0 l1 1310 810 l@

con'T 66 63 EVENT DATE le 75 REPORT DATE 83 O

i, 6u 61 OOCKE T NUMBER 1

8 EVENT DESCRIPTION AND PROBABLE CONSEoVENCES h Io 121 l Uuring steady state power coeration of 2344 MWt, secondary containment inteority was I

10131 I momentarily violated w%n plant personnel inadvertently opened the 164' elevation re-l

] actor building and turbine building airlock doors simultaneously.. The doors were l

o 4 Licensed operations personnel verified that the doors had been g

1 o I s 1 I closed immediately.

f o 161 I re-closed and that secondary containment integrity was maintained by at least b inch l

This is a repetitive oc-l 71

• of water vacuum pressure to comply with Tech. Specs 4.7.C.2.

o currence; refer to R0 Report #50-321 '979-086.l 80 0 a i 7

8 9 DE CODE SUBC E COMPONENT CODE SUSCdDE SU E

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10 11 12 13 RE\\ r sN OCCU R H E NCE REPORT SEQUENTIAL EVENT YEAR REPORT NO.

CODE TYPE NO.

O17,Rtg 18 l0 l l-l 1010l8l 1/l l 01 3 lLl

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33 34 35 36 31 40 43 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS The cresent desian of the airlock in-1 1i 1011 The cause of this event was desian deficiency.

De-1 li ti l I terlock system will not prevent the simultaneous ocenina of both airlock doors.

e sign Chance Reauest 79-409 has been written to revise the oresent airlock inteirlockinal i 2 The electrical desian is comrlete, I

[TTTl I scheme to orevent the recurrence of this event.

(continuedf l

li l4 ) I but imolementation of Design Chance Request 79-409 is awaitina 80 7

8 9 DISCOVERY DESCR PTION ST A

% POWER OTHER STATUS 015 O RY W [_Ej @ l0l9l6l@l-NA l

l A lgl Personnel Observation l

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COOTENT I

ACTivin LOCATION OF RELE ASE

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RELE ASED OF RELE ASE AMOUNT OF ACTIVITY j

PERSONNEt ExPOsOES i

NUMBER TYPE DE SCRIPTION j

[TITl l 010l Ol@[Zj@l NA B0 PERSONN E L INJURIES OEsCRiPTiON@

j NuMsER NA l010lOl@l 80 1 s 7

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2 o 68 69 C. L, Coogin, Supt. Plt. Ena. Serv, pgang W49WM

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7 8 9 10 NAME OF PREPARER

f Georgia Power Company Plant E. I. Hatch

• 'Baxley, Georgia 31513 Event Description and Probable ConsequencesThere were no effects on public health or safety due to this event.

Cause Description and Corrective Actions

(' cont!ned) delivery of cable, hardware, and electrical parts, and completion of the archit-ectural design.

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9 9

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4 1938 035

LER 7:

go-??1/1090 n09 Licensee:

Georgin Powe" Company Facility Nane:

Edwi.n I.

Hatch Docket f:

90-??1

Narrative

Report for LER 90 191/1090-009 On 1-19 80, at Oa??

hou-s while steady state one"ation, secondary containnent i n t e cr r i t y

'J a s nonenta"ily viointed when maintenance oe"sonnel inadvertent 1.y coened the 1'h' alevation reacto" building to contaol. huilding nialock doors RhD and 241 simultaneously.

The doo"s aemained opan for less thnn ten seconds as indicated hv the 4t"stion of the ala",

sounded in the cont"o1

" con.

Licensed operations ceasonnel v i. s u a l l y inspected the airlock doors to insure that thev had been properly aeolosed and that secondaav containment integrity was restored.

Licensed oceantions personnel also verifte' that secondaay containme'it intcgaity was rn a i n t a i n e d hv greater than or equal to 1/4 inch water vacuum orestare to comolv with Tech Spacs u.7.C.2, Secondary Containment, Su rve il l a n c e After Integrity Violated.

This type of v i o la t i. o n of seconda"y containment integatty has hacoened numerous times in the nast and

5. s caused hv the inadequate design of the present airlock interlock systen.

Althotagh plant personnel have been instructed in the p"opea usage of the a t a l. o c k doors, the o"esent atriock inte" locking scheme does not orovide a rapid enough response to prevent the simultaneous ' opening of two airlock doo"s.

Desico Change Request 70 400 has been written to revise the nresent atriock interlocking scheme,thereby alleviating the recuarence of this event.

This modifiention util assign a orio"ity to one of the doors and the "evised interlocking scheme will be enabled before the first doon is allowed to ooen.

The oroblem co secondaav containment integrity violations at r

the airlocks is inherent to both Hatch Unit 1,

Docket f90 1?1 and Hatch Unit ? Docket f50-366 Desien Change Request 7 n !! n o will he implemented for both Hatch Unit 1 and Hatch Unit ?

a t r i o c k' d o,o r s.

The p"esent ta"get date for conoletion of this

.nodification wi.11 he ielavad several nonths due to the lack o'

necessaay material.s.a n d incompleta a"chitectual r esign.

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3 1gb 1938 036