05000289/LER-1977-023-01, /01T:on 770926,during Heatup Operation Both Doors of Reactor Bldg Emergency Personnel Access Hatch Open Simultaneously.Caused by Failure of Interlock,Poor Hatch Design & Operator Error.Addl Interlock to Be Added

/01T:on 770926,during Heatup Operation Both Doors of Reactor Bldg Emergency Personnel Access Hatch Open Simultaneously.Caused by Failure of Interlock,Poor Hatch Design & Operator Error.Addl Interlock to Be Added

ML19261F311
Person / Time
Site:	Crane
Issue date:	10/04/1977
From:	Potts W METROPOLITAN EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML19261F310	List: 05000289/LER-1977-023, RO 77-23/1T:on 770920,both Doors of Reactor Bldg Emergency Personnel Access Hatch Open Simultaneously.Caused by Personnel Error.Doors Closed.Forwards LER 77-23/1T 05000289/LER-1977-023-01, /01T:on 770926,during Heatup Operation Both Doors of Reactor Bldg Emergency Personnel Access Hatch Open Simultaneously.Caused by Failure of Interlock,Poor Hatch Design & Operator Error.Addl Interlock to Be Added
References
LER-77-023-01T, LER-77-23-1T, NUDOCS 7910250772
Download: ML19261F311 (1)

LER-1977-023, /01T:on 770926,during Heatup Operation Both Doors of Reactor Bldg Emergency Personnel Access Hatch Open Simultaneously.Caused by Failure of Interlock,Poor Hatch Design & Operator Error.Addl Interlock to Be Added

Event date:
Report date:
2891977023R01 - NRC Website

text

JCENSEE EVENT REPORT CONTROL BLOCK:(

l l

l l

l (PLEASE PRINT ALL RENU' RED INFORMATION) 1 6

NAME LCENSE NLYSEA E

TYPE 01 l?

A T MlI 1l l0 0 l-l 0 l 0 0 {l 0l-l0 l 0 lh 1

1 1 1l l0l1l 7 89 14 15 25 26 30 31 32 CATEGCAY P

OCCKET NUMBEA EVENT DATE AEPOAT CATE O 1 CONT l l

lTl 8]

l Ol 5 0 l-l 0 l 2 l 8 l 9 l0 l9 l2 l0 l7 l 7 l1 l0 0 lh 7l7l 7 8 57 58 59 40 61 68 69 74 75 80 EVENT DESCAIPTICN

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Eg l During routine heatup cperation, both doors of the reactor building energency persenne]

7 89 80 3E l access hatch vere eten at the same time. The doors were closed within 10 minutes. Thid 7 89 80 SE is a repetitlen occurrence. An additional interlock device vill be installed to 7 89 80 0

ltrevent this occurrence.

(77-23 /1T) 7 89 80 EG 7 89 80 pnus CE COCE COMPONENT CCOE M

F VCLATCN EE l S l Al W l P l E l N l El TlR l lA l Cl 3 l1l 0l l Nl 7 89 10 11 12 17 43 44 47 48 CAUSE DESCRIPTION gg Failure of the interlock device, poor design of the hatch, and inaccurate l

7 89 80 3) training of the operator were the causes of this occurrence.

l 7 89 80 DE I

08 80 FACuTY METsCo op STATUS

% POWEA 01MER STATUS CISCOVEAY O!SCOVEAY DESCAtPTON d

l0 l 0l 0 l

NA l

l Al l

NA l

1 7 8 9

10 12 13 44 45 46 80 ACTMTY CCNTENT OF AELEASE l RELEASED AMOUNT OF ACTMTY LOCATON OF FELEASE W

NA l

NA l

E6 W

7 8 9

10 11 44 45 80 PEASONNEL EXPOSUAES NUMBEA TYPE DESCAFTU I gg l 0 l 0l Cj l Zl l

NA l

7 89 11 12 13 80 PERSONNEL INJUAIES NUMBEA CESCAIPTON

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7 89 11 12 80 OFFSITE CONSEGUENCES EU l NA l

7 89 80 LOSS OA OAMAGE TO FACIUTY TYPE DESCAIPTON D: L2_l l

NA l

7 89 10 80 PUBLICITY llE l Included in weekly news releases l

7 89 60 ACOITlONAL FACTOAS DE I N^

1482 Uzb BE l l

7 89 80 W. E. Pctts NAME:

- PHONE:

GPO 888 667 7m osso 7 7 2