05000348/LER-1985-001, :on 850214,gaps Along Portions of Tops of Two Fire Walls Not Sealed within 7 Days as Required by Tech Spec 3.7.12.Firewatch Patrols Established.Design Changes Developed & Implemented for Sealing Gaps

:on 850214,gaps Along Portions of Tops of Two Fire Walls Not Sealed within 7 Days as Required by Tech Spec 3.7.12.Firewatch Patrols Established.Design Changes Developed & Implemented for Sealing Gaps

ML20138K573
Person / Time
Site:	Farley
Issue date:	10/21/1985
From:	Mcdonald R, Woodard J ALABAMA POWER CO.
To:	NRC OFFICE OF ADMINISTRATION (ADM)
References
LER-85-001, LER-85-1, NUDOCS 8510300248
Download: ML20138K573 (3)

LER-1985-001, on 850214,gaps Along Portions of Tops of Two Fire Walls Not Sealed within 7 Days as Required by Tech Spec 3.7.12.Firewatch Patrols Established.Design Changes Developed & Implemented for Sealing Gaps

Event date:
Report date:
3481985001R00 - NRC Website

text

U S. NUCLEUd 5 EiULATORY COMMISS4086 NRC Peene 308 G.Ji APPROvt0 oms NO 315.-410 LICENSEE EVENT REPORT (LER)

F ACILITY NAME in DOCKET NUMGER 12t PAGE Ge Joseph M. Farley - Unit 1 015 l 0 l0 l 0 l 3l418 1 lOFl 0l 2 Tif LE t.#

Unsealed Gaps Above Masonry Fire Walls EvtNT CATE 15, LER NUMetR ist REPORT DATE 177 QTHER F ACILiTIES INVOLVED 18)

MONYM OAy vtAR YEAR

• Q,* "

"' V,'8,Q MONTH OAy vgAR Pac LaTv NAufs DOCILET NUM8ERi3}

J. M. Farley - Unit 2 015 l 0 l 010 l31 6l 4 0l2 1l4 85 8l5 0l d 1

- 0l1 1l 0 2l1 8l5 0 1 51 0 1 0 1 0 I I Twis REPORT is susMiTTED Pursuant TO THE REOuiMEMENT: Os io CrR g: lea.ca one or.

e,,ae,one. aer lite M00'

• I ao.ozm so.osm so 73<.nznes 73 7titi o wmo wm so ni.nin.,

72.ru.i y

1 i4

,2,.n n,

x gE R;,0. gag,,,,,

2.

.,mi.,

.o...n,

no, to.73f.n2ini So.73(.n2n.sesn Al J66Af 2o.oGl.nine.is

]

]

Report per Tech.

so rsi.nzn.insi so.oewme=>

so.ni.nanui no.asi.nin.i so ni.nzn.

so nr.nzn.>

Spec. 3.7.12 LICENBEE CONTACT FOR TMit LER 1121 NAME TELEPHONE NUM8ER ARE A CODE 8 919l-15l1l 5l6 J. D. Woodard 2l05 1

1 COMPLETE ONE LINE FOR E ACM COMPONENT F AILURE DESCRISED IN THit REPORT 113l AC REP L

CAVSE SY STEV COMPONENT "hy N

REP yhC-M

CAUSE

SYSTEM COMPONENT yO NPR S yO NPR $

I I I I I I t i

I I I I I I I

I I I I I I I

I I I i i !

SUPPLEMENTAL REPORT E RPECTED (141

. MOATM._OAv _YEAA_

$V8MI5560N vt S tl, ven temoi.,. EXPECTED Sugh,ISSION CA TEI

%Q l

l l

..YRACT<t,,,,,,,e,.oo,,,,....,,,e..,.,.,,,,y..o.<.,.,,,,,,,.,n.,

Gaps along portions of the tops of two fire walls were not sealed within seven days as required by Technical Specification 3.7.12.

At approximately 1500 on 2-14-85 it was discove, red that unsealed gaps existed between the tops of two masonry fire walls and the ceilings of the rooms.

These gaps were located above portions of the west wall of the cable spreading room of both Unit 1 and Unit 2.

Design drawings showed that these gaps should have had steel angle running on both sides of the gap with the steel angle anchored to the ceiling and RTV sealant between the steel angle and the wall.

The design was not implemented fully due to physical constraints. At the time of installation, engineering evaluations had been performed to justify the absence of the steel angle.

However, these evaluations were based on structural considerations and did not address fire protection considerations.

A plantwide walkdown of three-hour rated masonry fire walls revealed eighteen unsealed gaps at the tops of fire walls. Firewatch patrols were established as required in accordance with Technical Specification 3.7.12.

Design changes have been developed and implemented for sealing these gaps.

l The work was completed 9-20-85 for both units. Health / safety of the public l

was not affected.

/){'hl 8510300240 051021 j

. l PDR ADOCK 05000348 S

PDR i

~R,C,,,-

a b: e a m 3644 U 5. NUCLEAJ EEGULATORY COMMIS$lON LICENSEE EVENT REPORT (LER) TEXT CONTINUATION AreRovEo oMi Nn 3 iso-oio4 EXPIRES 8/31 r85 F ACIL1 f Y NAME til DOCKET NUMBtR (2)

LER NUM8ER (6)

PAGE13)

" C.

"3'3

"^a Joseph M. Farley - Unit 1 o l5 jo jo l0 l3 l 4l8 8l5 0l0 l 1

-- 0 l1 Op OF 04 TEXT rd more space ne requnred. use ed+ tenet NRC Form J66Ks)l11)

Gaps along portions of the tops of two fire walls were not sealed within seven days as required by Technical Specification 3.7.12.

At approximately 1500 on 2-14-85 it was discovered that unsealed gaps existed between the tops of two masonry fire walls and the ceilings of the rooms. These gaps are located above portions of the west wall of the cable spreading room of both Unit 1 and Unit 2.

The gaps between the wall and the ceiling ranged from less than one-half inch to two inches in height.

It was not possible to close the gaps found on 2-14-85 per the originai design because the tops of the walls were inaccessable. A review of design documents indicated that these gaps should have had steel angle running on both sides of the gap with the steel angle anchored to the ceiling and RTV sealant between the steel angle and the wall. Further investigation revealed that the gap between the wall and ceiling existed for seismic considerations and that the purpose of the steel angle was to limit horizontal movement of the wall during a seismic event.

The absence of the steel angle was approved by the design organization. However, this approval was based on structural considerations. The design organization was not able to determine the basis for accepting this design a,s a three-hour rated fire wall.

Design changes to modify the Farley Nuclear Plant masonry walls to be in compliance with IE Bulletin 80-11 were issued by the design organization in 1980.

Design procedures in effect at that time required the, design organization to review any design changes for conformance to ANSI N45.2.11 which requires the design review to include the effect of the design change on fire protection and fire resistance.

A review of design records does not indicate that fire protection considerations were addressed in the review of the design changes for the interface between the wall and the ceiling. The design for this interface was part of the original design of the walls.

In December 1983, APCo issued instructions to the design organization to provide further assurance that fire protection and fire resistance was evaluated for each design change. These instructions require the designer to determine, as a part of each safety evaluation checklist, if the Fire Protection Program Reevaluation or Appendix R requirements are affected. This action provides increased assurance that design changes will be evaluated for their adequacy relative to fire protection and resistance.

When it was determined that the design did not meet the requirements for a three-hour rated fire wall, a plantwide walkdown of three-hour rated masonry fire walls was initiated. This walkdown was completed on 2-21-85 and found eighteen unsealed gaps at the tops of masonry firewalls.

Firewatch patrols were established as required in accordance with Technical Specification 3.7.12.

Designs have been developed and implemented to upgrade affected walls to three-hour fire wall status.

Production Change Notice (PCN) 85-1-3148 implemented the new design for Unit I and PCN 85-2-3149 implemented the new design for Unit 2.

The work was completed on 9-20-85 for bcth units.

Nec 8049 yea e dit

Malling Address Alabama Power Company 600 Nort,' 18th Street Post Office Box 2641 Birmingham, Alabama 35291 Telephone 205 783-6090 R. P. Mcdonald Senior Vice President Flintridge Building Alabama Power

' " " * " " ~ " " '

October 21, 1985 Docket No. 50-348 Document Control Desk U. S. Nuclear Regulatory Commission Washington, D.C.

20555 Joseph M. Farley Nuclear Plant - Unit 1 Licensee Event Report No. LER 85-001-01

Dear Sir:

Joseph M. Farley Nuclear Plant, Unit 1, Licensee Event Report No. LER 85-001-01 is being voluntarily submitted.

If you have any questions, please advise.

t Yours very truly

1. (

W' R. P. Mcdonald RPM /J AR:ddb-D-LER Enclosure cc:

IE, Region II 4

p

,I I