ML19305F200

Part 21 Rept Re Failure of Fire Penetration Seals to Pass Fire Test.Cause Undetermined.Tested Matl Will Be Analyzed

ML19305F200
Person / Time
Site:	Vermont Yankee
Issue date:	11/03/1980
From:	Shute S CHEMTROL CORP.
To:	Grier B NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
REF-PT21-80-329-000 NUDOCS 8012290543
Download: ML19305F200 (14)

Text

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FRELIMitMY EVALUATI^M OF THE' ATTACHED REPORT I;OICATES LEAD RESPO*4SIBILITY FOR FOLLONJP AS SHJ'd EELOW:

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orporetion x,ea coee 7,3,4c9 9330 P. O. Box 38556 Houston, Texas 770CB TWX. 910 EB16223 6 -2.71 Noveraber 3, 1980 ,

e United States Nuclear Regulatory Commission 631 Park Avenue King of Prussia, PA. 19406 Attn: Mr. Boyce Grier Director, Region I Re: Fire Penetration Seals Vermont Yankee Nuclear Power Station

Dear Mr. Grier:

Chemtrol Corporation Quality Assurance Department feels it necessary at this time to inform you of a possible Non-Conformance per our installation of rated fire penetration scals at Vermont Yankee Nuclear Generating Station located in Vernon, Vermont. The following sequence of events should explain why we feel the possibility of a 1:o n- Co n f o rma n c e may exist and the circumstances which have' lead us to this final submission.

On September 10, log Chemtrol Corporation arrived in Vernon, Vermont in orcer to instal 1 ~ three hour rated fire

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penetration seals as contracted by Vermont Yankee !Juclear Power Corporation. Chemtrol's FC-225 Design Systems Specification Manual requires that our systems be installed utilizing CHEMTBOL CT-18/Dow Corning 3-654 8 RTV Silicone Toam and CilEMTROL CT 000/Dow Corning Sylgard 170 Elas~omer which we have tested and worked with for over five years.

T +. was requested of Chentrol, however, to utilize General ectric RTV Si2icone Foam and Elastomers for this job acause the General Electric tested system required a lesser ocpth of fill and the engineering personnel Lt Vermont Yankta were very concerned about the amount of material used versus cabic derating factors. The project began with a verbal agreement from General Electric Company to allow Chemtrol to install their tested systems, which does have American Nuclear Insurers acceptance. (See Exhibit A)

American Nuclear Insurers were advised of this arrangement and were given by Chemtrol typical details of the seals to f

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f be installed per the General Electric accepted system and were later provided with an entire engineering package, including all Quality Control documentation (by C"mtrol) of the penetrations that were sealed. They were not provided, however, with a written statement from the General Electric Company stating that they would indeed back-up their own designed systems as installed by Chemtrol.

This, to say the . l ea st , put Chemtrol in a bind. The legal department at General Electric decided that it was too much of a risk to acknowledge their own test results, the job at Vermont Yankee was complete, American Nuclear Insurers would not issue Vermont Yankee an acceptance for the penetration seals installed, and Vermont Yankee would therefore not totally pay Chemtrol for the work perfcrmed.

Chemtrol Corporation did manage to get General Electric to allow American Nuclear Insurers to utilize their fire test report in making an engineering judgement for a portion of .

the seals installed by signing a hold harmless agreement between Vermont Yankee, General Electric and Chemtrol. (See Exhibit 3) Chemtrol in conjunction with General Electric ran a fire test qualifying the control room seal installed at Vermont Yankee for which General Electric was given Arcerican Nuclear Insurers acceptance. (See Exhibit C)

The only real solution to this problem was for Chemtrol to perform qualifying fire tests typical of the seals installed at Vermont Yankee and therefore gaining acceptances from American Nuclear Insurers for General Electric Silicone Foam and Elastomer. Thus it would become a part of our own sealing system. Chemtrol did exactly that.

Chemtrol submitted fire test procedures to American Nuclear Insurers, which met with their acceptance (See Exhibit D).

The test configurations were designed so that ti.e sealing depth of materials was the same as those already successfully tested by General Electric at Underwriters Laboratories.

On Ortqhfr 27, 193 Chemtrol performed a fire test on C H E!* T R OL CT 800/GE RTV 6428 Silicone per ASTM E 119 standards. The test was performed at Portland Cement Association in Skokie, Illinois, and at one hour and thirty-one minutes the test was terminated as a failure.

(See Exhibit F) At one hour and twenty three minutes all but approximately 1/2 inch of the General Electric RTV 6428 Silicone had burned away.

I herntrol orporation +

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Chemtrol Corporation has run.many fire tests in its history but has never cbserved a silicone elastomeric material to burn as much as this material.

On October 28, 10$ Chemtrol performed a fire test on CHEMTROL CT-19/ G E 850 RTV Silicone which was quite successful.

The problem is that approximately *i S E of the penetration seals installed at Vermont Yankee utilized GE RTV 6428 Silicone and after seeing the performance of this material as exposed to ASTM criteria Chemtrol questions the validity of the original fire test performed by General Electric.

Chemtrol is in the process of having the tested mtterial analyzed so that we may be able to determine if there has been a change in formulation. We see no advantage in runring another test on this material at this time.

Chemtrol is very concerned about the seals installed at Vermont Yankee and we understand that a non-conformance may be in order. Chemtrol is not, however, willing to accept liability for the penetration seals installed if the information presented to us by General Elcetric on their enterial is by any means incorrect.

Please advice as to what the next step snould be. If. I can provide you with any further information, please do not hesitate to call myself or Mr. Jim Young, President and CEO of Chemtrol Corporation.

Sineerely, CHEMTROL CORPORATION es

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Sectt Shute Q.A. Manager SS/bk Enc.

cc: J. Young-Chemtrol Corp.

P. Fleming-Chemtrol Corp.

V. Cataldo-Chemtrol Corp.

M. Bornhoeft-American Nucicar Insurers W. Wittmer-Vermont Yankee Nuclear Power Corporation

b. Nelson-General Electric Silicone Pr,Mucts Division

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%M"iOrporstion Area Code 713!4E9-9030 P. O. Hon 365% Houston, Texas 77088 TWX: 010 E310223 February 27, 1990 Mr. Keith Finck cenm ul Cicctric Silicones General Electric Co.  !

Waterford, flew York 12188 Ref: lioid harmless General Electric Co.

Vermont Yankee

Dear Sir:

Please accept this letter as our agreement to hold Generel Electric harmless fr:v:; any and all loss er damage resulting from the use of the report which is .

to be uttiired by Cheatrol Corp. and ANI in the engineering evaluation connected ,

mth the evcluation of the wall penetration seels which have installed between the cabievaalt room and the reactor building at the Vermant Yankee Nucleer Gu,e.etin., station. Chc,. trol Corp. agrees to hold General Electric harmicss from any and all loss or da.T.a?;e resulLing f om the use of the report regarcless of the natures of the clai:r. and whether based on contract, tort (including r.egligence) strict liability or otherwise.

It is under:tcod the report will be furnished for evaluation upon acceptance by ANI, Chc r. trol and Vermont Yank;c of this condition.

To furtner clarify this approval by Chenitral Corp. o copy of General Electrics IM/, dated February 7/,19C9 is attached hereto and made part hereof this letter of acreenent.

Chem:.rel Corr.. woul; like to take this opp;rtunity to thank you for your eco:mration in this matter hud if you have any further questions regarding

nis and any other nu L

cr: ple<n,e feel free to :entact rac at (713)-469-g680.

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Exhibit C 1 p Chemtrol Corporation

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L *:t:lr.:. Pc.wl, **er.*!irirj C-5 Area Code 713/46 -057.~: j b-N,,,,, a thus U 9 fen.r.: 770 % TW/ 910 59107: j Cat'e CHE*.9T8: . . .

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t October 22, 1979  !

i CTP-0203  ;

iHREE HOUR it!RE EXPOSURE TEST P'-R AslM E-119 WITH HOSE STREAM i FIVE !!!CH (5") DEPTH CT-19/GE 850 RTV SILICONE l FON1 WI Di OHE INCH (1") NOMINAL Cf-2300 SER]ES  :

DAMMING P. AERIAL OVER EXISTitlG METAL PLATE. ,

(C!!1DI.ATiNG T.XTSTIf!G C9ilTRo!. ROOM CCNDIT10NS ,

Al VEP.MONT YANKEE !!UCLI"Ait POWER STATIO!!>

F.'Rf Ii 5i AII.I'EIGED A!;D (.0%iilf.[ii D IiY !

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October 17, 1979 Mr. F. . Nelson C;eneral Electric Company S111cono Prod,ucts -

h tarford, New York 12388  :

Dea: P.r . Netuon:

In accordance with provisions of your Purchase Order No.

3i!S 0 2 n S , dateri Supte:nber 7, 1979, we are submitting a Summary Report of the fire test conducted on September 19, 1979. De- ,

tails of the test, and observations noted during the fire and hose-stream touts are given below. -

The test specimen was exposed to the ASTM Designation: E119 Standard fire for 3 hr. l'our minutos after start of test, un:che was cbserved coming from cables in the southeast corner  ;

o f the specimen. This area continacd to smoke heavily for nbout i 30 ::in af ter which time the nmoke diminished. At 1 hr after  ;

start of terit, heavy umche again was obsr:rved coming frpm the cabi cs in the. southeas t corner of the spccimen. Two hours after start ot test, there was an upheaval of the foem material ~in the r.o .ithe a s t corncr of the specimen, and large amounts of smoke '

centinued to come frem this area.

w.. .

r.ac;ni tuh o r upneaval can he seen in the attached photographs.

licwever, no ficame-through occurred during the 3-hr exposure period.

Im ediate2 / actor the fire test , the spec.uaen was lifted from the furnace innd c':por.ed to a solid-streat.1 hose test. In a<.!Gition, t.he specimen was subjecLFd to a spray-type hose- ,

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cf any part of the specimen in cither huse-strocua test. '

T.:r:neratu'.es of St.me conduits and cables, and of the unexposed sur' aces ni the foam end sil.icato n:atorialc. were monitored by

!! t hery.coupl es . 'Ihermocouple locations are shown in the atts:hed shotch. Temperature records of the 8 thermocouples arc also ettsched.

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' coutivclion technetarjg Inbeantoriu  !

• .N r . n. Noisor, Pace Two Oc{ober 17, 1979 1

l At end of tent, the following temperaturns were recorded.

1. Average temperature of unexposed surface of foam - I 153F. -

2. Temperature of une.: posed surface of silicate materici -

100F. .

1

3. Temperature at interface of foam and concrete speci-men at unexposed surface level - 192F.

4. Temperature of copper wire of cable in southeast ,

corner of specimen - 820F.

5. Temperature of copper wire of cabic in northwest ,

corner of specimen - 404F.

1

6. Avercqe temperature of pipe conduits in silicato  :

area - 539F.

1 In accordance with your instructions, a cr.$py of rhis report has '

! been submitted to Mr. Spriggr., of Chemtrol Corporation.

Please let mE ):now if you have any questions.

Sincerely yours, l

.* ) l h'Y Dirr IIcr ' ~

Fire Research Department Melvin .9. Abrnmu i Ik  ;

CR-452) s At.tachmontn  :

Copy to-I W. G. Corley i Chemtrol (Mr. Spriegs)

Contral File i

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L:hibit D^ ~ t

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BURT C.PROOM.(PCU t oswrat Jr.nuary 31, 1920 .

P.r. Scott Shut.c ,

Qual ti.y &>surance Departr:ent che:at.rul Corporal. ion P. O. Box 38555 Houston, Texas 770'.:8

Dear Mr. Shute:

We have received and reviewed the Cheintrol Fire Test Procedures CTP-020c. , CTF-UPDS .'nd T', pical Drawint.; "l!" Revision 1, suhr.itted with your letter of January 'S,1980, to Mr. Willic:a Dornhoef t. Thase precedures pertcir: to tne proposed fire tests of C1-19/GE 850 RlV Silicone Fcan cnd CT-800/GC M20 RTV Silicenc Elastomer.

The test procedures suhr.itted art acce.ptable to /ccrican Nuclear Insurers for inr.urcnne Purposes. If we can be of any further assistance piecse do not' hcs itate tc, contact us. -

Sincerely, t

f.h h btk,,

Robert F. MacF.illan .

Project Engineer F.FiU tc

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