ML19276F538

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Forwards Draft 1 of Proposed Revision 1 to Reg Guide 1.131, Qualification Tests of Electric Cables & Field Splices for Light-Water-Cooled Nuclear Power Plants, Value Impact Assessment & Public Comments.Guide W/Draft Mods Encl
ML19276F538
Person / Time
Issue date: 03/08/1979
From: Arlotto G
NRC OFFICE OF STANDARDS DEVELOPMENT
To: Fraley R
Advisory Committee on Reactor Safeguards
Shared Package
ML19276F539 List:
References
RTR-REGGD-01.131, RTR-REGGD-1.131 NUDOCS 7903300592
Download: ML19276F538 (9)
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UNITED STATES y

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g NUCLEAR REGULATORY COMM!ssioN j

W ASHINGTON, D.

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MAR 8

'S79

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MEMORANDUM FOR: Raymond F. Fraley, Executive Director ACRS FROM:

Guy' A. Arlotto, Director, Division of Engineering Standards, Office of Standards Development

SUBJECT:

DRAFT 10F PROPOSED REVISION 1 TO REGULATORY GUIDE 1.131, " QUALIFICATION TESTS OF El.ECTRIC CABLES AND FIELD SPLICES FOR LIGHT-WATER ~CCOLED NUCLEAR POWER PLANTS" Enclosed for initial review by the ACRS Regulatory Activities Sub-comittee are fifteen copies of proposed Revision 1 to Regtalatory Guide 1.131, " Qualification Tests of Electric Cables and Field Splices for Light-Water-Cooled Nuclear Power Plants," Draft 1, dated March 5,1979. Aiso enclosed are fifteen copies of the Value/ Impact Assessment for the proposed revision.

The guide was issued for public cement on August 16,1977 and coments were received. Subsequent to the coment period, a decision was made to postpone issuance of Revision 1 of the guide pending the results of research on the sensitivity of variations in fire qualifi-cation test parameters being conducted for NRC at Underwriters' Laboratories (UL). Conclusions from the results of the UL research show the necessity of establishing more specific values for some of the fire test parameters. These conclusions have been incorporated in the proposed revision to the guide. Substantive changes have been made in the guide since the guide was issued for public comment.

Therefore, the guide will be reissued for public coment before issuance as an effective guide.

Copies of the public coments received during the first coment period and a resolution of coments are included for use by the Subcomittee.

Regulatory Guide 1.131 endorses, with certain exceptions, IEEE Std. - 383-1974, "IEEE Standard for Type Test of Class IE Electric Cables, Field Splices and Connections for Nuclear Power Generating Stations."

Copies of IEEE Std. 383-1974 were transmitted to the Subcomittee on February 11, 1977 preceding the Subcomittee's review prior to issuance of Regulatory Guide 1.131 for the first public cement period.

7902a0 osO

Ib To:

R. F. Fraley Since the draft guide is preliminary, a?jitional staff efforts, including review and resolution of public :omments, will be necessary prior to implementation of a regulatory position.

ACRS Subcommittee comments and recommendations are reques+ d on the a posed regulatory position.

e f

GuyA.1 Arlotto, Director Divisicp of Engineering Standards Office of Standards Development

Enclosures:

As Stated cc: NRC Public Document Room 7

Draft 1

[gasaw%.

March 5, 1979 U.S. NUCLEAR REGULATORY COMMISSION

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@,_ ?4 REGULATORYGUIDE

,.,. A.

OFFICE OF STANDARDS DEVELOPMENT REGULATORY GUIDE 1.131 MD QUALIFICATICN TESTS OF ELECTRIC CASLZSAF1 ELD SPUCESe

  • N9=GONN4iGEGN4) F_C_R LIGHT-WATER-CCCLED NUCLEAR PCWER PLANTS A. INTRODUCTION the Insijated Conductors Commmee of the Power Engineering Socety of the Insuture of E!cetrical and Criterion III. " Design Control." of Appendix 3.

Electronics Engmeers, Inc. (TW"), acproved by the

" Quality Assurance Criteria for Nuc! car Power IWW Nuclear Power Engineermg Committee, and P! ants and Fuel Reproc=ssmg Plants," to 10 CFR subsequently approved by the f*3 Standards Board Part 50, "Limsu g of Production and Utilcation on February 23,1974 It was approved as an ANST Facilities," requires that, where a test program is standard, ANSI N41.101975.csAprd 30,1975. The used to verify the adequacy of a specide design standard definentes,recedufes 'for deva'eting a feature, it include suitable qualification testing of a program for quamicancretesung-os cacies rfic!d e

prototype unit under the most adverse design condi-splic=s. an nic supelenients IA Std tions. This regulatory guide describes a methed ac.

323-197 IEEE Srm reed 5cciualifying C: ass IE ceptable to the NRC staff for complying with the Equipment for Nucicar PtaveD"Tenerating Stations,"

Commntion's regulations with retard to which describes Ifasia,rectiirements for equipment tion testing of eleenic cables. pieta spuc=s@qualifica-qualification. IF9S'tdl23-1974 is endorsed, with

--- for service in licht.wster-ceoled nuc! car c::tain exce,ptionstrgy Regulatory Guide 1.S9, r--

sower ptants to ensure tnat tne canicsjfield splic=s.

PowerJactsg"% Class IE Equipment fo "Qualificarica 2nc

-- can perform their safety-related 9

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funcnons.' The fire test provtsions of tfiis guide co

%%Q dhortl Std 383-1974 was issued.

not apply to qushon for an installed configura-seversb{y% iter 13=abafatories and. cable tion.

. ersicc"=& difficulty in producing a consistent flame by using the burner and flame source

8. DISCUSSICN cedures spec:fied in de standard. An IW task forl:= investigation into the proelem was eventually IEEE Std 383-1974. "IEEE Standard for. Type expanded to include an evaluation of various flame Test' of Class IE Elec=ic Cables. Ficid S#ges and scure:s to determine if the 70,000 Stu/hr flame Connections for Nuclear Power G~eneratf-source specified in the srsmbrd was correct for use in Stations."' was prepared by Working Gdiu 12-2 of fire qualification testing. Theinvestigation found that inconsistencies in the flame scure= were tr'Wie to s

'R egulatory Gade I.3. -Sesms Dansa das the inadvertent use of incorrectly stzed burners dur-sw~= mia ressre to idanurying assme cadies. fleid spiica.

ing certain tests.

and counscnons to wMch the denga.rerificanoa reqmrt= cats of Appenda 3 to 10 CFR Part 30 appeja)

As usedin tMs regulazory swde:5,s.p.A am-tes: and A Wes d m m deine d. 6 mm h

ype tasc ars synonymous.

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v sourc= had be=n selected was conducted, and the a

'C.apacs :nay be octameMpa ture of E:semeal and results. 23 evaluad by 6 F MEm ad de E!caronics Ensmeurs. trmtad einneerms camer as E2n ceh NRC sta T, mdicated no basis for changing the 70.000 Streut. New Yorr.J.*gli. f Br"/b *

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/non..r.y or c.ne caole co recarcl Q design basis event and speciEed conditions of r rne dame tests covered oy Secnon 2.3 of the < tan-<

installation. Type tests shall demonstrate dard provide a test pnmarily of the; margm by application of multiple transients, in-tendency.cf the cable inemsomen material. Th'ese tests tard-l I are conducted with cables in a specinc con 5guration 632/

creased level, or other justinable means.

Satisfactory performance of the cable will be and subjec:ed to a denned fire source. However, the eyaluated by cie=rical and physical measure-fire semenesee=& semens may vary signi5cantly under ments appropriate to de type of cable during or 3 different environmental conditions, cable condgura.

following the envuonmental cycie, or both. ne tions, and fire sources. It should be recognized that fac4rs for margin given in Sec:ica 6.3.1.5 of the objec:ive of the flame test is to erovide zuidanceOe-IEEE Std 323-t974 shall be used where ap-for the selec: ion of fir" caotes ratner tnan ta tard-}plicable.

a"'Nia the adequacyIsf the installation of cables in gg)"The values of pressure temperature radia a nucicar power plant. Adequacy of cables as instal.

led depends on many factors. Mor$er, the adequacy tion, chemical concentrations, humidity, and of the cable system as installed depuds on other fac.

time in IEEE Std 323-1974 do not represent ac.

tors m addition to the propernes of the cables. For ceptable limits for all nuclear power stations.

eaample, cable separation criteria are ddi" mead in The user of this standard shall ensure that the Regulatory Guide 1.75, " Physical Independe=ce of values used in the required type t=sts re= resent E!cc:ric Sye-nt" and fire protec: ion guidelines are-ac=ptable limits for the servic= conditions in ddin-W in Renhemy Guide 1.120 " Fire Protec.

which the cable will be instal-y tion GuiMina for Nucicar Power Plants."

led."

gna r:.eu souces sone aspects of IEEE Std 383-1974 is concerned with cables both

3. In lieu of See: ion 2.1, "Introdue: ion," the foi-inside and outside the contamment and **'Mides lowing should be used procedures for simulanng operating conditions so that type tesdng will be adequate for the intended ser.

" Type tests described in this document are vice conditions. It covers normal operatmg and mededs_that shall be used to qualify efec:rical design basis event condidons, except that the fire test cables {He a spaces [agh for use in is a referenc= configuration and flame rather than the nuclear power generaung stanons. Tests of the design basis connguration and Game.

cable or connec:fon assembly, as applicable, shall then supplement de cable tests in order to C. REGULATORY POSITICM qualify the connec:fons and other aspec:s uni-que to planned usage.

Conformance with the ir.q=

ents of IEEE Std 383-1974, "IEEE Standard for Type Test of Casa IE "The values of pressure, temperature, radia-EIcc:r:c Cables, Ficid Splic=s, and Connec: ices for tion, che=ical concentrations. humidity, and Nuclear Power Generstmg Staticus." is '-table time indicated in IEEE Std 323-1974 do not for quahfying electr:c cablesAdesa spuc=sp represent ac=ntable limits for all nuclear power aessmenomas components (fire teet provtsions co not generanng stauons.

appiy to qualiHeation for an installed condguration)

"The user of this guide shall ensure that the for service m light water. cooled nuclear power plants values 'ased in de required type 'ests represent to ensure dat de cablesfama spuh ac=ptable limits for the service conditions in esmecan perform de:,r safety-related func:fon sub*

which de cabi me jec to the following:

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1. In lieu of Secdon 1.3.4.2.3, "Other Design Basis "Results of prior tests that are being used as the Events," de following should be used bases for de present tests shall be refere=ced in the documentation."

"The rmmder of the complete spe:trum of design basis events (e.g., events such as a steam line bresk) shall be considered in case they

4. Sectiert 2 3.1, " Temperature and Moisture represent different types or more severe hazards Hasistance," lists industry acandard UCZA to cabic operation."

S-19-81, " Rubber Insulated Cable" for a nois-cura resistant test.

The exception allowed

, In lieu of Sec:fon 1.3.3.3, " Test Design Basis Event." the fodowing should be used in the second paragraph of See:1on 6.9.1 o.,

UCIA S-19-81 should no be *m unless it

    • Type tests for design basis event conditions can be cer:1fied that the insulation, in the shall consist of subing non aged and aged absense of covering, can =eet the require-cablesgic:a spuc=spac)eeenessmene to a se-

=ents of UCZA S-19-81.

1.131

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5/ In lieu of Secdon 2.3.2, "Long-Term Physical "If de above mededs demonstrate dat de Aging Propernes," the foilowing should be usec qualiHed life is less than the design life. 2 developed periodic replac-ment plan should be in-

" Aging data shall be, f.the insulation. Gees-

to establish stituted."

long-term performance o

) Synergistic effects 6 on aging due to sim[nbring LCCA conditions referred to in S simultaneous application of environ-6. The radiological source term and exposure rate rental conditions shall be consider-ed in the accelerated aging program.

2.4.2, " Radiation Exposure-Total," should be ob-Investigation shall be perfor=ed to tained from Regulatory Guide 1.39 rather than from decernine if there are synergistic IEEE Std 323-1974.

effects and, where identified, they shall be accounced for in the qual-

. 7. In Heu of Se@n 2.5J, % seral,,, & Mow-mg should be used ification progras. The effects or.

te=perature

%is section describes the method for type may be evaluated using the Arrhenius tech-tadng of grouped cabla via the verdcsl tray

$\\ nioue. A mmmum of 3 data points, including flame test to detme deir relauve eed-lo-IWQand two or more others at least 10*C

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apart in temper 2ture, shall be used.

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flame retarding tendencies. Additional ce!c 2ted aging tecamqEes cangeuzbly produce test shall h done to h st m N end-of-life conditions, the following ongoing the fire retarding properties of the cable qualiHcatica procedure should be use are not adversely affected by aging; other-

, rise, the vertical tray fla=e test shall

    • Ongoing QucHRectfen Pmeeeke-Some types be conducted separately on aged as well as of cables.filetc spaces,D "

usaged cable."

(hercarter reterred to only as cables) may not respond in a representative manner to ac-ceierated aging techniques to establish end-of-y,. In lieu of Sccion 2.5.2.2, the following should design-life conditions. Consequently, the be usec qualiRed life would be less than de requi ci design life. There are two suggested methods of "The Ere test provisions of $= standard areo a

achieving long-term (design life) qualification:

useful in screening out cable insulanondjack (2) After a planned period less than the materials according to relative et qualifed life of the cable has been r-"M fla=e retarding properties s

representauve cables should be replaced with new cables and the removed cables subjec ed to e c e, but they shall not be construed as a qualification test similar to that performed qualilication of any installed cable system con-

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prior to installation. This test should include figuration. If ficid splic=s are to be used in enble fire additional ac=! crated aging. Successful com-trays, eeemes-easemenemof snau ce mace to casts piedon of dis test extends the qu21med life of demonstrate that de Sre retardant properdes of the installed cables, This procedure should be the esble are not a!tered unac=ptably me=een repeated until the qualified life equals or ex-emmennemenean by de ficid splice."

creds the required design life. (b) Addinonal identical cables should be installed in a nucicar "f

z power genersting station location or other

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invironmentally equivalent locacicus where power.

Ioading and servce conditions equal or exceed those of the cable to be qualified. A cable should be removed after a planned period less than the previously qualiHed life and subjeced 5

to a qualification test similar to that performed Rap,tesen4:tive Mh s 2,tz ic 6e aciaciad prior to 6* brio's. This test should include ac-f, tem dtc4e cab 424 dtai Itave tecELved die ceiersted aging. Suc=ssful compledon of this mc44 4 eve,te se,tvice ccncit,4cna Wtc!.adbtg test extends the qualified life of the installed 2ccding, h 44tza4 and p,te44u,tz, cable. Sui!!cient additional teenucal cables mag,,,,sjej,,n and cite'ticai should be tmtially.nstalled in order that the ggy g,

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NL' REG /CR-02f6 (%d72-0799) "Qu ZLfication ed f,,;g,t;ge.

'uals or ex e rec-Testatg cv&owrt 7.tagn.:m' mgust 1973 1.121-3

9.

In lieu of Sectiva 2.5.4.1, the fol-12/. In lieu of Seedon 2.5.4.4, the following should lowing should be used:

"*ests shall be be used conductad withis a test enclosure. The "De gas bum cast enclosure shan be a nonisal 8 ft p* propane gas er Game source shall consume z 8 ft x 8 ft co= par ~aat as shown is appromam

,e tu per bour at an Was rado oQo L ar-Figure 1.

The interior surfaces of the enclosure shan be s1=aral =aterial such

@c'. --_4 grade propane shad be used. De procedure detailed below shall be followed" as Mari 1:e board, or similar inorganic

=aterial. Several observation windows 13ff. In lieu of the first sentenc= of Secdon 2.f.4.4.1, and an access door shan be provided.

the fodowing should be used na interior surface shall be painted flat black. A nominal 12 inch high open-

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ing shall be provided at floor level

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across the entire front and rear walls.

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WM ne top of the enclosure shall be cc:r-plately open. Ventilation of the build-ing or room in which the test is con-5,' Qf((urdr + han be =custed ducted shall be sufficient to prevent oxygen depletion by rr z.irculation of com-parallel to the place of the horizon.

bustion products. A=bient ai na burner head shan be midway between tray temperature shan be.8.r and cable the tray rungs with the center of the 25.

prior e

e to each cast.

burner positioned 24 21/8 inchas fron the bottom of the tray. He burner face shan be located 4 :l/8 inches 10.

In lieu of Section 2.5.4.2, the fol-from the cable, in front of de cable loving should be used:

"A tray config-tray.

uration perpendicular to the plane of the horizon shan be used. ne tray shan be a steel, open-ladder type cable tray nom-inn 117 8 f t long and 12 inches vida.

14)[. In lieu of See: ion 2.5.4.4.J. the following ne side channels shan be no-1,a11735 should be used 3/8 inches deep wid 1 inch flanges and 0.060 inches thick. The rungs shan be

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E noMnnuy 1 *~ 4 x inch U shaped Anr"al, 0.125 i=ches thick and welded to de sida rails at 9 inch isvervals."

pr per f a:a s urce s be a-chiaved when the fuel input race is 70,000 tl,600 3'FJ per hour and the n.

In lieu of Section 2.5.4.3, de fol-supply air flow is 163 :10 standard loving should be used: " Multiple lengths cubic feet per hour. Flow rates are of cable shan be used and arranged in a to be =enicerad by rocamatars as shown single layer filldsg the centar 6 inch in Figura 2.

portion of the tray with a separation of approx 1=ately h the cabla dia=ater be-15.

In lieu of Section 2.5.4.4.4, the tween each cable. La cables shan be tied at 18 inch intervals along the cable

. noving should be used.

n.est pro-A cray (every other rung) using No.16 ST' cadure - ignite the burner and auev it to burn for 20 =inutes. Record -m'd-steel wire cias. The tast shan be con-ducted 3 ed ~ s to demonstrata reproduc-flama height for each minute during the-g,,

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ibility using diffarent sa=ples of cable.

AH 3 tasts sust =aet the requira~"ts of burn af ter the gas bur:er is shut off, Section 2.5.5 for -Ja cable to be con-sidered as having passed the cast.n

'An Amer.cna Cas Furnace ca.104a. Il-53 dnuins. nbbon-cTe.

catalos so.10X t155 wita an sir 1:a encen :mzer. :ssa.tes ::o.

v 14.it (t :bf /in' c:ax. gauts ;tessuret :s :as only ;resenuy avaiiacia mocal ta21 has been found sausiactcry for pureoses Qt, these tests.

1.131-4

D. IMitEMENTATICN an d =d -e jackat/ insulation da: age The purpose of this sec:fon is to provide informa-(which includes the langth of cable ma-tion to applicants and licensees trgarding de NRC terial consu=ed, selted, blistered, or starts plans for util!=ng this regulatory gutce.

charred)."

Ex:ept in those cases in weien de applicant proposes an acceptable alternative method.6ee 16,'/. Section 2.f.4.5 is act endorsed by this

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Section 2.6, "Docu=entation of Type 3 J'J T - ' T~ l i--

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Testing," should be supplamnted with the

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following: "?rovide data necessary to of conplying with the specified portions docu=ent satisfactory cou:pid " ce with the of the Co dasion's regulations, the =ach-procedure oueldmed."

od described herein vill be used in the evaluation of all construe:1on per=1t ap-plications and reference systen pre'd d'ary 18/ The recomme::dations indicated by "should" design applicacious (?DA) for which the and the options indicated by "may" in the sec::ocs of issue date of the Safacy Evaluation Report IEEE Std 383-1974 indicated beiow have su!Ticient (SE) is (one = cath after issuance date of importance to be treated the same as requirements of the guide), except those portions of a con-de standart struction permit application which:

(a) reference an approved PDA or FDA,

s. See: ion 1.3.1, " Cable Description" (b) reference parts of a base plant de-
b. Seedon 1.3.2, "Fieid Splices or Conne::fon sign qualified and approved for Description" replication,
c. See: ion 1.3.4.1, "Meedng Service Conditions";

(c) reference a plant design approved the fir:t sente=ce.

or under review for approval for

d. See: ion 1.3.4.2.1, " Design Basis Event-manufacture under a Manufacturing LOCA*
e. Seedon 1.4.1, " General,,

License, or applicaticus for such

f. Secdon 1.4.3, " Test Results"
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g. Sec: ion 1.4.4, " Test Evaluation" For those construe:1on per=1t applica-
h. Seedon 2.2. " Type Test Samples" tions for which an SER was issued prior to

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1.

(one =cuch after issuance date of guide),

the NRC staff =ay, subsequent to issuanca i

See: ion 2.3J.3 j

See: ion 2.3.3.4 of construction permit (or operating lic-k Secdon 2.4.3, "LCCA Simulation"

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          • 1"*** Ch* SEE * * *** *Y 1*pf. See:ica 2.4.3.1 case basis to assure that acceptable =ethods 3,/. Secdon 14.J.2 for qualification of electric cables have n.f. Sec:fon 2.4.4, " Post LCCA Simulation Test been specified in purchase orders executed a

for such cable on or afte:/ (effective date

.e Eassessoass=i &

of guide).

w=seesvow=heessed o.jt Secnon 2.5.5, " Evaluation" p / See: ion 2.5.6, " Instrument Cable and Single Conduc: ors from Multicondue:or /.ssembly";

the recommendation that the tested cable pass a llame resistanc= test in accordance with ASTM D22~.0 48.

19 / See: ion 3. ** References," ofIEEE Std 3831974 lists additional applicable IEEE standards. The specific applicability or ace ptability of these referenced standards has been or wdl be covered separateiy in other regulatory guides, wccre ap-propnate.

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