NRC-91-0160, Application for Amend to License NPF-43,providing Updated Lab Testing Std for Surveillance Testing of Representative Activated Charcoal Samples from CR Emergency Filtration Sys & Standby Gas Treatment Sys

Application for Amend to License NPF-43,providing Updated Lab Testing Std for Surveillance Testing of Representative Activated Charcoal Samples from CR Emergency Filtration Sys & Standby Gas Treatment Sys

ML20100Q014
Person / Time
Site:	Fermi
Issue date:	01/29/1992
From:	Orser W DETROIT EDISON CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
Shared Package
ML20100Q016	List: ML20100Q018 NRC-91-0160, Application for Amend to License NPF-43,providing Updated Lab Testing Std for Surveillance Testing of Representative Activated Charcoal Samples from CR Emergency Filtration Sys & Standby Gas Treatment Sys
References
CON-NRC-91-0160, CON-NRC-91-160 NUDOCS 9202050192
Download: ML20100Q014 (8)

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ison =ne- #1 Janua ry 29, 1992 NRC-91-0160 U. S. Nuclear Regulatory Com.cfssion Attn: Document Control Desk Washingt on, D. C. 20555

References:

1) Fermi 2 NRC Docket No. 50-341 NRC License No. NPF-43

2) Det roit Edison let te r t o NRC, NRC-91-0150, dated November 11, 1991

3) Det roit Edison letter to NRC, NRC-90-0150, dated September 11, 1990

4) Detroit Edison let ter to NRC, NRC-91-0151, dated November 14, 1991

5) NRC letter f rom Mr. William Gammill to Mr. Fred Lakie, Nuclear Containment Systems, Inc., ,

dat ed Sep t embe r 24, 1981

6) NRC Information Notice 87-32. " Deficiencies in the '

Testing of Nuclear-Grade Activated Chattoal "

dated July 10, 1987

7) Det roit Edison le t ter t o NRC, NRC-89-0215, dat ed Novembe r 16, 1989 Subj ect : Proposed Technical Specification Change (License Amendment) - Charcoal Testing St andards f or Control Room Emergency Filtration System and Standby Gas Treatment System Pursuant to 10CFR50.90, Det roit Edison Company her eby preposes to ,

amend Operating License NPF-43 for the Fermi 2 plant by incorporating the enclosed chat,3es into the Plant Technical Specifications. The l proposed change provides an updated laboratory testing standard for -

surveillance testing of representative activated charcoal samples from the Control Room Emergency Filt ration System and the Standby Gas Treatment System. In Reference 2, Detroit Edison conmit ted t o submit a Technical Specification change proposal to update these standards.

This submittal satisfies this commi tment. ,

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. . USURC Janua ry 29, 199.'

NRC-91-0160 Fage 2 Detroit Edison has evaluatal the proposed "'achnical Speci fications against the criteria of 10CFR$0.92 and detv 2ined that no significant hazards consideration in involved. The Ferioi 2 Onsit a Review Organization has approved and the Nuclear Safety Review Grot.p has reviewed t! a pioposed Technical Specifications and concurs with the enclosed c< tern:inat ions. In accordance with 10CFR$0.91. De t roit Edison has provided a copy of this letter to the State of Michigan.

If you have any questions, please contact Mr. Glen D. Ohlemacher at (31*a) 586-4275.

Sincerely. _

s cc: T. G. Colburn A. B. Davio R. W. DeFayette S. Stacek Supervisor, Elect ric Operators, Michigan Public Service C mmission - J. R. Fadget t I

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. USNRC l

Janua ry 29, 1992 NRC-91-0160 Fage 3 E

I. WILLI AM S. ORSER, do heteby af fir 1n that the foregoing statements are based on f acts and circunstancer, which are true and occurate to the best of my knowledge and balief.

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h({ % s WILLIAM S. ORSSR Senior Vice President Ac CT_jf/ _ day of(, A m 2 it./

On this .

, 1992. bef ore nie personally appeared 'Ailliar. S. proer being first duly sworn and says that he executed the fcregoing Ss his f ree act rnd deed, J/.hv (( l/ N feTt Isotary Public

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Enclosur e t o 14C-91-0160 Tage 1 IWrRODUCTION Tschnical Jpecliication (TC) survellis.nces f or t he St andby Caa Treatment Syst em (fGTS) and th 5ttol Roun Emergency Filt ration System (CREFS) require a 13 bort sna13 sis of a seprecentativs sample of chatcoal from the systtw filter t r ains. Thest analyes o are required at least once overy 18 mont hs. uiter 720 hours0.00833 days <br />0.2 hours <br />0.00119 weeks <br />2.7396e-4 months <br /> of chatcoal adsotbet operation and follow'ng specifled events, which nay degrade charcoal perioteance. The specified event s are stivetural inaint enance on the filter or chatroal adcorbet housings. and af ter painting, f tre or chemieni re?"se in any ventilution zone conmunicat ang with the system. These wurveillance requirements are detailed in TS 4.f . 5.3.b.2 and 4.6.$.?.c f or SGTS, and in TS 4.7.2.c.2 and 4.7.2.d fo. CREFS.

Each of these surveillances specify that t he satople saet t the t ectihF criteria of 9egulatory Position C.6.a of Regulat ory Guide (RG) 1.5 2.

Acvision 2. March 1978. A maximum inethyl iodide penet ration is also rpecified for each system. This penetration is based upon t he asourned inef ficiency of the filter traia when evaluated under accident conditions. The testing acceptatmo criteria includes margins f or ,

filter bypass leakage and potentie1 t enting inaccurecies.

Regulatory Position C.6.a of kG 1.52, he"ision 2 ref ers t o ANSI 16 09-1976 f or laboratory testing nethods. A1481 1609-197 6 tefers to kDT M16-1T f or det ailed pr oceduren. More recent standards exist which give mor e cons 4 stent and accurate result s. The purpose of this submit t al is

• propose changes t o t eilect the mor e recent ASTH D3803-1979 pct 'ures. ASTM D3803-1979 la the tect procedure referenced by the tost recent indust ry ctandard on this subject. ASME NS 10-19 P9. In addition, impott er.t t est paremet ett are specified to aseure proper test conditions are est ab11ched.

FVALUATION The propoced changro inodify the laboratory analyuis reqtiteciente of the SGTS and CREFS TS by specifying a new testing procedut e end deport ant t est paramets ts. such as t empet ature. relative humidity and filter bed ' pth needed to utilire the procedure.

The test t.P edure specified is ASTH D3803-1979. This procedure in ths rest cumcunly used procedure for the putrose of detertnining the ef ficiency of charcoal ins'talled in engineered safety feature (ESF) strysphere cleanup syrtetus. TMs procedure pr oviden prent er consistency and accuracy than the procedure called for by A!!P 16 09-1974. Une of the new procedure therefoto provides greater

Enclosut e to i NRC-91-0160 Pye 2 assurance that the inutalled chatcoel will pe f orm it s intended sof ety function.

In Reference 5. the NRG ataf f specifically addicused Inboratoty methyl iodide testing sequiteinents and the icuue of how to perfona these tests when the standards ref erenced by RG 1.52. Revision 2 are

- updated. In this instance. the isnt=> wao t bat ANSI N509-1976 had been updated by ANSI N509-1980. ANSI N509-1980 and ACME N510-1989 both refer to the testing procedures of ASTM D3603-1979. Reference 5 indicated that the utility has an option of literally invokina ANS1 NSO9-1976 or uts11 f r.g the updated ptandard. ANSI N509  ?.

Reference 5 indicates that on a technical basis the 1980 s. t u.d was preferred. Consistent with this philosophy. Det roit Edison han been using t he procedutos of ASTM D38031979 f or cha rcoal t est ing.

This proposa11retuoves the = option of invoking the t echnically inf etior ANSI H509-1916 ctandard and requit os the use of the twting procedures called for by the lat est indust ry standard. ASME h510-1989, which remains ASTM 03803-4979. This is consistent with the philonophy.

expressed in Reference 5. to use the latent indust ry guidance when st andard updat es occur.

A 1989 version of ASTM D3803 han be sn is sued. The 1989 votoion provides a modified test niethod which precedes the methyl iodide penetration tent with a 16 hour1.851852e-4 days <br />0.00444 hours <br />2.645503e-5 weeks <br />6.088e-6 months <br /> exposure of the chatcoal to air at the specified temperature and humidity for the test. Tbin trucess in ref erred t o as pre-equilibration. Expoaing t he chatcoal to humid air decreases its adnorption eq ebility and t hus, this tent twthod provides an increase in the methyl fodido penetration when con' pated to the 1979 tect version. This is cor.aervatJw. particularly in relation to the dose calculpeions involved. For esataple, mose than a third of the tot al Cont rel c;.,om -iodine dove is calculat ed to be experienced in the fitat 8 hours9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> of the design basja accident. (The Contiol Room donc calculation was submit ted with Reference 7.) During this 8 hour9.259259e-5 days <br />0.00222 hours <br />1.322751e-5 weeks <br />3.044e-6 months <br /> period. charreal saturation in less likely and the charcoal perf orn.s bet t e t than modeled during the tent. Alt hough ASTM D3801-D89 provides a conservative teat. adopting this procedure w thin tim le neither necessary ner desir able.

ASTM D3803-1989 han not been widely accepted in the f rJuut a rince it has not 1+en required by the latest ANSI or ASME standardo. As stated

- above. the 1079 version or its equivalent continues t o be used by a majority of units. -

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• Enclosure to NRC-91-0160 l Page 3 i l

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ASME l$101989 does not reflect a need tot pre-equilibtation priot to penet ration tecting. In 1987, t he NRC isow!d Inf o mation Notico 87-32  !

(Reference b) on this subject. This notice indicat ec, by r ef e r ence t o a teport, the decitability of pre-equilibration and the need for close ,

tolerances at high reistive humiditiec (approximately 95% and above). '

ASME N510-1989 indicates that ASTM D3803-1979 wau undet evision atid  ;

provides guidance regarding testing tolerancer. ASME 610-1989 alco i mentions that humidity pre-equilibration results in a more conservative test than the ASTM D3003-1979 required non pte-equilibration. It does not, howeve r. Indicat e t hat pre-equilibrat ion is necessa ry.

ASTM D3803-1989, due to it s corrervo tism, will requite charcoal replacement at a greater frequet>cy than that envisioned at the time of  ;

syst em decign. Note f requent charcoal teplacement o w!!1 tequit e increased out-of-service time and create dif ficulties in ostar,o scheduling. This does not appent warranted considering the conservatism lwhind tne test accept ance cr it erir., including the post-accident iodine source t erm. Det roit Edison believeo that implementation of ASTM D3803-1989 if ultimately deemed necessa ry, should be coordinatod with changes to accident scarce terms and filten safety f actors used f or the determination of the ourn ;11ance acecptance crit eria. This will allow adjustment of acceptance criteria to maintain t he designed filter media lifetimes.

For the abovo t ensons. Det roit Edison does not believe th t adopting ASTM D3803-1989 is appropriate at this time. HEC reprocentatives and 4

documents have indicat ed that the post-accident f odine source reta is under review and regulat ory guidanc. ney be issued in the future on charcoal illter testing. Det toit Edison will review uuch guidance if it is issued and take any appropriat e actions at that time.

The ur.2 of ASTM D3803-1979 does not pose a safety concern. The existing safety f actors. filter ef ficiency savumptions and cource tetma provide- suf ficient conservatism and safety margins. Avoiding unnecessary -charcoal replacemerto allows resources t o be applied t o ,

more important tasks and teduces filter out-of-service time during replacement.

Ab7M D3803-1979 can be applieu using either of two test temperatures.

In addition, the procedure has def aalt values for relative humidity

- and filter bed depth which are utilized unless othetvise specified.

To assure ASTM D3803-1979 is properly applied, this proposal specifico

.. t he t es t _ t empe r a tu t d. relative humidity and filter bed depth f or each surveillance. The t emperature and humidity values pr ovided in the proposed TS bound the expected accident conditions at t he f 11 t e r. The i

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Enclosure to NRC-91-0160 Page 4 proposed filter bed depth values correspond to the installed bed i depths for the illter units. ,

In summary, the ptoposed <:bange enhances wafety by providing an updated charcoal laboratory testing procedure and asscciat ed test pa rame t e rs for CREFS and SGTS. The change provides greator assurance that the installed charce61 can perform its design function.

SIGNIFICAlfr HA7.ARDS CONSIDERATION in accordanar with 10CFR$0.92. Det roit Edison has made a detetmination that the prop sed amet dment involves no significant hazards consideration To make this detettinction. Det toit Edison must est ablish tha' peration in accordance with the proposed amendment would not 1) 2nvolve a significant inciense in the probrbility or consequences of an accident previously evaluated, or 7) create the possibility of a new or dif ferent kind of accident from any accident previously evaluated, or 3) involve a significant reduction in a margin of safety.

The proposed change providec an updated standard for laboratory analysis of representative charcoal samples f rom filt er units in the Standby Gas Treatment System (SCTS) and the Contaol Room Emergency Filtration System (CREFS). The proposal does nots

1) Involve a significant increase in the probability or concequences of an accident previously evaluat ed. By providing an improved i procedure for chattoal analysis the propocal provides greater assurance that the installed charcoal can perform its design function and, thus, the consequences of evaluated accidents are valid. The method of laboratory analysis has no ef fect upon how the plant is operattd. . including the method of sample removal. '

Theref ore, the probability of any evaluat ed accident is unchenged.

2) Create the possibility of a new or dif ferent kind of accident f r om any accident previously evaluat ed. As described in 1) above. the proposal has no ef fect on the manner of plant operation. The proposal does not involve any change to the plant design. Therefore, the change creates no new accident modes.

3) Involve a- significant reduction in a margin of safety. liy providing an improved procedure for chattoal analysis the proposal acts to maintain existing safety margins.

Based on the above. Detroit Edison has determinod that the proposed amendment does nut involve a significant hazards consideration.

. Enclosur e to NRC-91-0100 Page 5 KN#1RONMENTAL IMPACT Dettoit Edison has teviewed the pt oposed Technical Specification chantec against the critetia of 10CFR$1.22 f or environment al

)

considerations. The proposed change doeu not involve a s:ignificant hararda consideration, not significantly change the typen or significantly increase the amounts of ef fluents that may be teleased of f site, not significantly increase individual ot cunulative occulutional radiation exposuren. Based on the foregoing, Dettoit Edison concludes that the proposed Technical Epocifications do meet the criteria given in 10CFR$1.22(c)(9) for a categorical excluulon from the requirement s f or an Envir onment al Impact St at ecent .

CONCLUSION Based on the evaluation above 1) there is reasonable anuurance that the health and safety of the puslic will not be endangered by opetation in the proposed mannet, and 2) auch activities will be conducted in compliance with the Commission's regulations and proposed atendments will not be inimical to the comnon defense and secu-ity or to the health and cafety of the public.

As stattu above, the current Fermi 2 charcoal testing program utilizes the test procedures of A However; in the case of SGTS, a test torpetoture of 80{TM C has D3803-1979. been specified instend of the proposed 30 C test t emp e t a tu r e . Dettoit Edison intendo to utilize the 30 C test temperature during the next -cheduled surveillance third refueling outage. It is unnecessary to perform tests during the tests at thgC 30 carlier. This is because the results of the last tests at 80*C showed .001 percent penetration versus an acceptance i criteria of .175 percent penetration. The effect of the t emperature i dif ference on the test recults is quit e small when compared to this margin between the results and the acceptance criteria. If this proposal is approved prior to the third refueling outage it is requect ed that the an endment allow implecentation of the change with the next pe f ormance of the af fected surveillances. In any case, a thirty day deptementation period is r equest ed for sit e document r ev ision.

The attached TS pages also reflect the TS changes proposed in References 3 and 4. The Reference 3 and 4 proposals are independent of this proposal although they af fect the same pagec.

. . .