ML20027A947

LER 82-036/03L-0:on 820808,hole Discovered in Fire Barrier Wall Above Door 309.Caused by Snubber EBD125R43 Penetrating Wall Through Pipe Shell.Hole Left by Workers After Work on Snubbers.Fire Watch Established & Hole Filled

ML20027A947
Person / Time
Site:	Davis Besse
Issue date:	09/07/1982
From:	Wolfe R TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML20027A945	List: ML20027A944 ML20027A947
References
LER-82-036-03L, LER-82-36-3L, NUDOCS 8209160210
Download: ML20027A947 (2)

Text

NRC FORM 366 U. S. NUCLEAR REGULATORY COMMISSION (7 77).

ucENSEE EVENT REPORT CONTROL BLOCK: l 1

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(PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION) lO lil8 l9 o l uLICENSEE 7

l a l BCODE l s l 11@l 14 15 0 l e l-l e l LICENSE e 10NUMBER l e 10 l- 10 l e25l@l4 26 l'1LICENSE 11 l1TYPE l l 1JOl@l57 CAT 58 l@

COWT "E 0R lolil 7 8 3o 9C l60L @l61 l 5 l 0DOCkJT l 010 l 3 l 4 l 668l@l69 018EVENT NUMBER l e lDATE 8 l 8 l 274 l@l75 Gl REPORT 9 l GlDATE 7I R l 807 lh EVENT DESCRIPTION AND PROBABLE CONSEQUENCES h IO l2l l (NP-33-82-41) On August 8, 1982 at 1012 hours0.0117 days <br />0.281 hours <br />0.00167 weeks <br />3.85066e-4 months <br />, a QC inspector fi>und a hole in a firel 10 l a l I barrier wall above door 309. This hole was created by snubber EBD12SR43, which be- l l0 l4 l l cause of the configuration of the main feedwater line in this area, penetrates the 1 O 5 I wall through a pipe shell. The station entered the action statement of Technical 1 0 6 l Specification 3.7.10. There was no danger to health and safety of the public or to I a l0 l7l l station personnel. There was no fire which required the fire wall to have its l I O la l I integrity intact. I 7 8 9 ,

80 E CODE S SCO E COMPONENT CODE SUSCOdE SU E lO[9l 7 8 l Al Bl@ W@ lC l@ l Bl Zl 3l El El 3l@ W@ W @

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. SEQUENTIAL OCCURRENCE REPORT REVISION LER/RO EVENT YEAR REPORT NO. CODE TYPE N O.

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_ 21 22 23 24 26 27 28 29 30 31 T K N A TO ON PL NT MT HOURS 22 SB IT FOR b B. SUPPLI MANUF CTURER lJJx l@lx_J@ La_J@ Iz_j@ 10 l0 le IT I 37 L11@

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34 35 36 40 42 43 44 . 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS h li l0 l l The hole was Icft by workers who did not fill the area between the pipe shell and l l i l i I,l snu'bber with an approved fire retardant ma'terial'aftor"the work on the snubber uns I

, 2 l complete. A fire watch was immediately established, and the hole was properly filledI i,l3ll at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> with Kaowool. l i 4 l l 7 8 9 80 STA  % POWER ,OTHER STATUS IS O RY DISCOVERY OESCRIPTION i 5 (_g ) 16 ld 16 l@l NA l [.Aj h ! Discovered by QC inspector. l A TIVITY CO TENT RELE ASED OF RELEASE AMOUNT OF ACTIVITY LOCATION OF RELEASE i 6 [3_] @ [_3_j@l NA l l NA l 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES NUYBER TYPE DESCRIPTION l i l 71 1010101@La_J@l NA l PERSONNE L imu'AES nom 8ER DESCRiP7 ION @

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LOSS OF OR DAMAGE TO FACILITY Q TYPE DESCRIPTION v i 9 l_a_J@l NA l PUBLI TY NRC USE ONLY O O 46 ,

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d TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLEMENTAL INFORMATION FOR LER NP-33-82-41 DATE OF EVENT: August 8, 1982 FACILITY: Davis-Besse Unit #1 IDENTIFICATIONOEOCCURRENCE: Hole found penetrating a fire barrier wall.

Conditions Prior to Occurrence: The unit was in Mode 5, with Power (MWT) = 0 and Load (Gross MWE) = 0.

Description of Occurrence: On August 8, 1982, at 1012 hours0.0117 days <br />0.281 hours <br />0.00167 weeks <br />3.85066e-4 months <br />, a QC inspector found a hole in a fire barrier wall above door 309, the access door to Mechan-ical Penetration Rooms 3 and 4 corridor. This hole was created by snubber EDB12SR43, which because of the configuration of the main feedwater line in this area, penetrates this wall through a pipe shell.

Technical Specification 3.7.10, which requires all penetration fire barriers protecting safety related areas to be functional, was applicable during this occurrence. The action statement requirements were satisfied by the estab-lishment of a continuous fire watch, sesignation of Apparent Cause of Occurrence: The hole was left by workers who did not fill the area between the pipe shell and rnubber with an approved fire retardant material after the work on the snubbe was complete.

Analysis of Occurrence: There was no danger to the nealth and safety of the public or to station personnel. There was no fire which required the fire wall to have its integrity intact.

Corrective Action: A fire watch was immediately established,-and.the hole was

. properly filled at 1500 hours0.0174 days <br />0.417 hours <br />0.00248 weeks <br />5.7075e-4 months <br /> with Kaowool.

Failure Data: Previous violations of fire barriers were reported in Licensee Event Reports NP-33-79-61 (79-059), NP-33-79-63 (79-060), NP-33-80-11 (80-008),

NP-33-81-24 (81-022) , NP-33-81-52 (81-046) , NP-33-81-81 (81-068) , NP-33-81-87 (81-072) and NP-33-81-93 (81-077).

LER #82-036 J