ML19259D123

Responds to IE Bulletin 79-01, Environ Qualification of Class IE Equipment. Results of Reviews of Class IE Equipment,Chiller Equipment & Safeguards Bldg Ventilation Fans Encl

ML19259D123
Person / Time
Site:	North Anna
Issue date:	09/17/1979
From:	Stallings C VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:	Stello V NRC OFFICE OF INSPECTION & ENFORCEMENT (IE)
References
NUDOCS 7910020614
Download: ML19259D123 (38)

Text

{{#Wiki_filter:* . /C TH.lS. DOCUMENT CONTAINS POOR QUAUTY PAGES VamosurA ELucTasc Ann Powna Courawr Ricmsono.VamonnaA asaoa September 17, 1979 Mr. Victor Ste11o. Jr. Director Serial No. 90C Division of Reactor Operations Inspection P0/FHT:baw Office of Inspection and Enforcement Docket No. 50-339 U. S. Nuclear Regulatory Constission Permit No. CPPR-78 Washington, D. C. 20555

Subject:

IE Bulletin 79-01 North Anna Power Station Unit No. 2

Dear Mr. Stello:

This letter is in response to the subject Bulletin. " Environmental Quali-fication of Class IE Equipment". Attachment 1 provides the results of the our review of Architect-Engineer (A-E) procured Class IE equipment for North Anna Unit 2. As discussed in our earlier submittals for North Anna Unit 1 (Serial No. 90A dated July 2.1979, and Serial No. 908. dated August 13. 1979) two potentially unqualified items were identified during the review of quali-fication information. These are also applicable to Unit 2: 1. Chiller Equipment used for control and relay room air conditioning. 2. Safeguards Building Ventilation Fans Attachments 2 and 3 provide additional information on and resolution of these two items. We also stated in our August 13. 1979 letter that we had directed our A-E to review NSSS vendor supplied qualification docunentation listed in to determine the qualification status of NSSS vendor supplied equipment. We will forward the results of this review as soon as they are available. Very truly yours, hkh lddh-jW C. M. Stallings Vice President-Power Supply and Production Operations cc: Mr. James P. O'Reilly. Director Of fice of Inspection and Enforcement Region II 7910020 ( l.4-MQW40

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Meeristlem af Acet4e,t ravtreme-% rrvironment to Witch Fot+ts. 19 Oualif int M9emar of (ggd {f tan tion ' Oegig giegt19' h9t ..,2f;334 I.e**-of-Cne17et Peei#ent ftted IM Test - Sequentaal chosige = 2 91.wgly,9 yep;g s s.':.2 .- r power Cable E3. 141 Cated Tchrstry 22, 1972 250*F 0 to 20 min Age 1 163 hr at 121*C ~~ Recuee fram 280*F 1rracicted to 2 at 10* rada Aadi t Wal 9 tm-- t r

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• ex 503 xCM to 150*F 30 to 60 min

- :..tr 250 F.Cx 1 0*F >63 min resa 1.xposures . Outlize of Fran111s 1snitute s r 32/0 FJ:G. 45 peig 0 to 30 min 324*r at 30 poig 0 to e hr e Research Leberatory h9ert F-C359 -;1 N - u ;.'.. z 31 A:dG. Reduce from 45 to 252*F at 16 pnig for 7 C.nys Ophg 33 to 40 min Cyrays 10,003 p;e lesic acid imitered 0 psig >60 min wath M.no:3 to a plI of 19.5 thzougrout the mt Transaction Pager T 74 Ott 4 7.2 x 108 rade nat exposurc pe riod. Sprays Boiling Fater ke. actor Exposure 0-4 hr solution of boric acia A scrics of tront.ient cycles each 82.000-2,103 ppm boron) consisting of a riso to a sg.ccitted tuttered to a pm of 0.5 to 11 prescure and temp:rature sur e crecatied witA pao 3. time and a grad : 1 return to intini >4 hr Similar solutica with a cc.ndition. Folicwing trancient cycios pH ct 7 to 9. 100 day crposure to live a,teaa O paig 8 232*7. e \\ 1 4 e e s e " wa s.* *.== . -e a r

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Udfic4*'e" ?"*tt DW *f NW1'"D Pras).lin Ie:titste Re-earch Labsta 18 N ^11f W EW roveat to MM Ypio Tess = &cquatial Omrt F CMN pgt,yg g y."* O pa;71rtiM of Accident ?viremt 19Q'g E Transaction Pa;s* ** 14 Ct3 04 e wyv pp, ff.OCM .-- - t m i m -o! W 1mt MC10 eat hsed 1* days at 250*F2rredisted to.5 x 10* zads and agoc at

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5 O psag 74 :e TOP rads of boric acid 313e to 346*F/ 5 tr.md 5 min sprays Solution bu:fored 113 psig L br as.4 5 sda 0-a hr

1. 2,003-2,100 ppe boron) c2.

3 4*r/113 poig 8 hr to 11 hr 8 to 6 i.e to a pH of 8.5 to 11 with nasirilar solution with a 335*F/?S peig 11 hr to 15 hr >4 hr N 15 hr to a day pit of 7 to 9 315*T/'as priq a day to 31 d.ay 265*F/23 paig 212*T/0 psag ion of e W.tirxously fer 31 day period solut2,CCO y boron as korte acia 2n.tfe-e Spr.sy: d vi 2 EeCa to a pt to 9-11. Irradiated to 1.5 x 10* r&ds during the ? 12 x 10' rsda W 31 cay period. Ma* J e 4 16

s 62nlifiew tw tem'-t Maver of Mtilf f

• c1 tim T e N n1M_id rnetw, ere to ttich ?mde pose Descrirtion of Acep) cme Fnvironment

, e s Bone ~ 3 ;- - % se-imtion C *e. g r%S in turbine bicg.1Tarpment prone --ae v=1vy 1, 2 in Chiller Roots empated tor tilies e - w -d't-115-211*P for t-1, 2: located in Chiller Room

1. Migh axbient t eperestre

-a . cf.r...ta of self-cleanir.g duration of steam stischarge in air H: vicit.ity of chiller roco

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intakee

• 30 minutes.

2. Migh achter.t reisture content-1002 F3 for saturated steam, steam discharge - 30 duration of minutes.

x e a ratu:e 211*r

1. nigt. exeiant eem,wphe:e r.sz.s ir. turbine bles.. Equipmer.t at saturetoo u.

T1,X 3.;3 79 - gehn w eg 9 in chiller room expc sed son Vendor reply to T1.X inquizy to J. E. grec3 ting -c,f,y - e, Pt m s es-r-soa, 211*F for .r.2. i p carpr.y 2.0. N.-24213 lo:sted in 1.111g5 aabient sectatu-odischage in eration of eters vicinity of chil2er =com air C..e'.c: 2cc=. ir.ta>.t s 30 minut.ee.

2. High arbient moisture content =

10G3 R1 for saturated eters, ste.wr discharge = 33 duration o* nicutos. -.... ~.. = I =

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1. msetation tone 2v no yr doce +

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1. Equipment Description & Mark No. A. Control & Relay Room A/C Chillers Westinghouse; 2-RV-E-4 A, B. C ; P. O. NA 247, located in Chiller Room. B. Air Conditioning Self-Cleaning Strainers Elliot Company; 2-HV-S-1A, B; P. O. NA-299; located in Chiller Room C. Motor Operated valves - Fisher Governor Company - Continental Division - Field P. O. - Natkin No. 8514-A-2008, located in charcoal filter duct from Chiller Room. D. Motor Operated valves - Elliot Company 2-MOV-HV-115-1,2 2-MOV-HV-116-1, 2 P. O. NA-299 located in Chiller Room as components of self-cleaning strainers. E. In-Line Nmps - Air Conditioning - Bingham-Villiamette Company 2-HV-P-20A,B, C; 2-BV-P-22A B.C; P. O. NA-276; located in Chiller Room. 2. Qualification Deficiencies Equipment potentially not qualified for exposure to: A. High ambient temperature 211*F. B. Saturated atmosphere, 100Z R.H. (Typical for all equipment listed on this page). 3. Resolution Use equipment in unaffected Unit to maintain Control Room environment. 4. Justification for Resciution in the event of a main steam line break (MSLB) in either turbine build-ing and the corresponding failure of a main steam stop valve to shut, the temperature in the control room A/C chiller room will approach 180*F at 100Z relative humidity due to a steam blowdown entering the chiller room. A/C chiller systems have not been qualified to withstand these environmental conditions. In order to maintain habitable temperatures in both Units' control roorns under the above conditions, it is necessary to operate two A/C chillers in the unaf fected unit. Continued operation of Unit 2 can be justified on the basis of always having two Unit 1 A/C Chillers, one Unit 1 emergency diesel generator and the two Unit 1 emerger.cy busses available. Since the analysis

assumes that a main steam trip valve fails to shut, no other single failure need be postulated per Regulatory Guide 1.81. Therefore, only one Unit I diesel generator need be available to operate two A/C chillers (this reguires tying emergency buses IH and 1J. /

1. Equipment Description & Mark No. Axial Flow Fans - Joy Mf g. Co., P. O. No. MA-201; 2-lW-F-71 A,B located in Saf eguards Bldg. 2. Qualification Deficiencies Equipment potentially not qualified for exposure to: 6 A. Radiation - 1 x 10 ra'a s 3. Resolution Replace with qualified motars. 4. Justification for hit Operation Until Motor Replacement Fans 2-ET-F-71A and B have been installed to provide ventilation to each recirculatir.g spray pump and safety injection pump cubicle following a design basis accident (LOCA) and subsequent loss of exhaust resulting f rom a tornado-missle which may occur 24 hours f ollowing a LOCA. In the event of a LOCA, the safeguards area ventilating fans 2-HV-F-71A and E are potentially not qualified to withstand the re-sulting radioactivity and may become inoperable. Continued plant operation until a qualified motor can be obtained is justified since the probability of a design basis accident (LOCA) followed by a tornado is less than 10E - 7. (Reference NuReg 75-057). 5. Sched ule New motors have been ordered and will be installed as soon as they are available.

k North Anna Unit No. 2 NSSS Vendor Supplied Safety-Related IE Equipment Qualification References Function Manufacture /Model Qualification Reference 1. Steam Flow Rosemount/1152 DP Rosemount Test Report 117415 Rev. A, 9-24-75 2. Pressurizer Barton/763 NS.-TMA-1950 Submitted to Pressure (I.ot 1) NRC 9-29-78 3. Pressurizer Barton/764 M e41384 Submitted to invel (Prototype) NRC 3-23-7 7 4. P. S Pressure Barton/763 NS-CE-1384 Submitted to wide range (Prototype) NRC 3-23-77 5. Wide Range Rosemount/176KS WCAP 9157 RDs 6. Narrow Range Rosemount/176KF WCAP 9157 RTDs 7. Errow Range Rosemount/1152DP Sane as 1 above S/G 1.evel 8. Valve Motor 1.imitorque/ SMB WCAP 7744 Operators NS-CE-69 2, 7-10-75 NS-CE-756, 8-15-75 N S-C E-84 7, 11-24-75 .}}