ML19296B003

LER 80-008/03L-0:on 800116,during Fire Protection Sys Barrier Surveillance Test,Gaps in Conduits Found.Caused by Procedural Deficiency.Holes Temporarily Sealed W/ Kao Wool.Procedures Modified

ML19296B003
Person / Time
Site:	Davis Besse
Issue date:	02/13/1980
From:	Chesko R TOLEDO EDISON CO.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
Shared Package
ML19296B000	List: ML19296A999 ML19296B003
References
LER-80-008-03L, LER-80-8-3L, NUDOCS 8002190673
Download: ML19296B003 (2)

Text

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           /                                                                         LICENSEE EVENT REPORT h-                                                                                                    (PLEASE PRINT OR TYPE ALL REQUIRED INFORP.',ATION)

CONTROL ELOCK: l 1 l l l l l 0 lh j o j t l l0 lli l D l B l S l 1 l@l 0 l 0 l- l 0 l 0 lN l P l F l- l0 l3 l@l 4l 1l 1l 1l 1l@lbl CAI l l@ 7 8 9 LICE?.JE E C' J JE le 15 LICENSE Nu?MER 25 26 UCENdE TYPE JJ $3 CON'T "E 7 o i i 8 3c.[[c60l L @l 0 l 5 CGCr.ET bl l 0 l-NU?.10 l 0Eal 3 l 4 f3l 6 @l O 0EVENT l1 l1 l6 l8 l0 DATE 74

                                                                                                                                                  @l   75 01211l         3l 8 l 080 l@

REPORT DAT E EVENT DESCRIPTION AND PRC8ASLE CONSECUENCES h [ o l 2 l l On 1/16/80 at 0900 hours during the performance of ST 5016.11, Fire Protection System l o a Barrier Surveillance Test, test personnel found a gap around a lb" conduit which penej [ o 14 l l trated a fire wall. On 1/19/80, a 4" hole with a 2" conduit was found in the south c 5 ' wall of #2 electrical penetration room. The action statement of T.S. 3.7.10 was o o entered until the holes were temporarily sealed. There was no danger to the nealth g jol7]l and safety of the public or station personnel. Fire detection devices were operable.

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I o la l I (NP-33-80-11) - 7 8 9 C CE CCDE SUS O E COMPCNENT CODE SLBC OE S E o 9 IA lB l h [D_j h l Zl h l Z Z l Z l Z l Z I Z lh lZ lh [Zj h 20 7 8 9 10 '. 12 13 13 19

                                        ,,_                                           SEQU E NTI A L                       OCCURRENCE             FEPCRT                      REVISION ga          EVENT YEAn                                  R EPORT NO.                              CODE                 TYPE                          N O.

O a(g.j,qc ;g l al 0l l-I l 01 0l 8l 1.-l l0l3l lt l l-l LO_J _ 21 22 23 24 26 27 23 29 33 31 32 TAKEN ACT CN PL NT .t T HOUnS SS IT D F hub. S PPLIE I MANLFA T E9 [,JJIj@l Gl@ 33 34 l3aZ l@ lZl@ 3G l0l0l0l0l 31 10 l43 Yl@ lNl@ 42 lZl@ 43 l44Z l 9 { 9 l 947l@ CAUSE OESCRIPTION AND CORRECTIVE ACTIONS h i o l The cause of these occurrences can be attributed to a procedural deficiency which did I _ l t li l [ not address the temporary sealing of holes or the gap around the conduit through a 1

   , [,j7l l hole, especially if the conduit or pipe is not installed immediately after the core
   , lil3l l drill is completed.                                     The holes were temporarily sealed with Kao-wool.                                                  A memo was              i

_ lil4i [ issued warning against breaching of fire barriers. Procedures have been modified. 7 8'9 80 ST 1 S  % PCWER OTHER STATUS IS O RY OfSCoVERY DESCRIPTION _. y lEl@ l1l0l0]@l NA l l B l@l test observation l ACTIVITY CONTENT RELEASED G8 RELEASE AMOUNT OF ACTIVITY LOCATION oF RELEASE NA __ d W 7 8 9 h lZ l@l NA 10 tt 44 l l 45 80 l PERSONNEL EXPOSUR ES NUM9 E ft TYPE NA ~ l1171 l 0 l O I 0 lhl Z lhl DESCRIPTION l PERSON NE L INJURIE S Nu-ssR cEsCRiPriCNh _ ITIl l 809 l 0 l 0 l@l NA l 7 11 12 . So l LOSS OF OR OW AGE To FACILITY TY8E C ESCRIPTION

• l' o LZJ @ l u^ l 7 46 9 10 . gg PUBUCITY NRC USE ONLY

- ,, o gj'gi"'NT"" 8002190673 i i i i i iiiiiii, ii i 8 9 10 63 . 69 80 , DVRs 80-014 Richard C. Chesko 419-259-5000, Ext. 274 o W NE: $ 80-015,. 80-0E69 M PREPARER O= .

TOLEDO EDISON COMPANY DAVIS-BESSE NUCLEAR POWER STATION UNIT ONE SUPPLEMENTAL INFORMATION FOR LER NP-33-80-ll DATE OF EVENT: January 16, 1980 FACILITY: Davis-Besse Unit 1 IDENTIFICATION OF OCCURRENCE: Pipe and conduit penetrations through fire barriers not scaled properly. Conditions Prior to Occurrence: The unit was in Mode 1, with Power (MRT) = 2772, and Load (Gross MWE) = 920. Description of Occurrence: On January 16,1980 at 0900 hours during the performance of ST 5016.11, Fire Protection System Barrier Surveillance Test, test personnel found a gap around a lb" conduit which penetrated a fire wall above the normal entrance to Room 236. The space should have been sealed with grout or silicone sealant or temporarily sealed with Kao-wool. This placed the unit in violation of Technical Specification 3.7.10 which requires all penetration barriers protecting safety related areas be functional at all times. A fire watch was established per the action statement until the penetration was temporarily sealed with Kao-wool. On January 19,1980 at 1120 hours, test personnel discovered a 4" hole with a 2" conduit in it through the south wall of the #2 electrical penetration room. The gap was immediately packed with Kao-wool, and thus no fire watch was established. Designation c f Apparent Cause of Occurrence: The cause of the first occurrence was procedure deficiencies in that the appropriate procedures did not address the temporary replacing of seals af ter conduit or pipe installation especially if the conduit or pipe is not installed immediately af ter the core drill is completed. The cause of the'second occurrence was improper initial installation by construc-tion personnel. Analysis of Occurrence: There was no danger to the health and safety of the public or to station personnel. The fire detection devices in the rooms would have pro-vided early warning of fires in their areas. Corrective Action: A memo was issued to all station personnel warning against breaching of fire barriers. The applicable maintenance instruction (MI-M-87) has been modified to address the described deficiencies. It should be noted that ST 5016.11, Fire Protection System Barrier Surveillance Test is still in progress and any subsequent occurrences of this kind will be reported as a supplement to this Licensee Event Report. Failure Data: There have been three similar reportable occurrences, see Licensee Event Reports NP-33-78-137, NP-33-79-61, and NP-33-79-63. LER #80-008

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