ML19259D123
| 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
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/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 Attachment 4 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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-:: v ns Labsratory Rey:rt F-C2357 er *.re C,able Ims c' coolant pecidait fWQ g
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' e ; Cerro's 3J7;1erant to F.1.2.L.
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- rads , Repors F-C2;S7 W ipisx 42/3 AwC Re 'ece from 28 0*F 50 psig and 276*/ f or 12 t.: -
Frerflin 2netitute Petearch
'1 t/c 2-te 4.nd e.a12 to 1$0*F 30 to 60 Min e Laboratory Pe;ost F-C27 0
.1 7/o 012 AwG 150*F >60 Min Errays test 2 tir of 12 hr twriod erith a as psig 0 to 30 Min e.oletier,of bot scrt watar cu.itaining
- , s/o 916 AWG corro's surplo:-ent to F.I.2.L.
.7 2/o se Ah3 Redues from 45 reproximately 1,7N pga of b ron ao bario 2
to o psig 30 to 60 Min acs4 . Depo-t F-C2750 0 psig '>60 Min 7.2 x 80' rods Feduced to 5 peig and 164*F cuer an* unapoc181cd tims with spray co:itinuing spray 160*? at 5 poi for the rewinder of the 0-4 hr solution of boric acid 7cayperiodwfthoutspray * (2000-2100 pre boren) buffered to F-C2750 indicates that in an earlier a p's of B.S to it with WaOH tes. the spray was buffered with \
..] >i tr similar solution ELOR to ph of 9 with a pH of 7 to 9 ,
e I'C,1 tTa s 0er 0 to 2 Min Same as *Descrip*.lo.1 of Accident
,F o Min Inviro m t Temperature = Analyale FSAR Section 3C and response to 40 psig 0 to 60 Min Cor: ment 7.17
, Mazirmru calculated surf ace tenpera-O peig >40 Min 3 x 10' rede ture durin7 IL;ais199 r.5La is 335*? Rockbeato's letter dated 4/25/77 which does not creces qualification te pcreture et e&O*r gaver. in 3DCA qualification docments
.j Pe.c%bestoc* (for7erly Cerro) letter
, date$ */;L/77 4
Fressure and Radiation - Test Refor to LOCA Qualification 4 h
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Test = Sequential Frar1.Lin Instit=te Restarch
, . f.-312/'112 Laboratory Report F-C2357
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tidle ca-oervi Logs of coainat Aeeienne rLOCA1 LOCS e Cerro's supplemsst to F.2.R.L.
- . 2/c e2 tvG 200*r O to 30 r.in Irradiated to 2 x 10* rods ,
- t/c sie At3 Feduce from 280*F 30 to 50 F.in 50 9:17 a91 271*F for 12 tr ,
Report F-C2357
$prayi Laat 2 tr cf 12 hr period with a
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.S 2/c sta As3 tt 150 *F 360 Min solethon of borated w'.ter contataLpq
-- 3/c sie A73 15C*F a5 psig 0 to 30 Min approximately 1,720 ppm of boron as borte .
- 5/c e16 Aw3 acad 7/c ele Fe3 Roduce from 45 0 to 30 Min 9/c s14 At*3 to 0 psig
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- 12/c tie AUG. 0 p:ig specifica tLre with spray continced i . 1/e 612 ARG 7.2 x 10' rada
- 2/c 012 AK'G Sp rays g
-.' s/c e12 Aws 0-e tra Solution of boric acid 160*F at $ poig for the remainder of the i
$ a 7/c e12 .Y'G 12,000-2,103 ppm boron) buffered 7 day period with no spray
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.' - 2/c 63 AX3 De hr sLailar solution with a p1 of 7 to 9
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- F D60 Min hr for total dose of 2.01 x 10' rad.
40 psig 0 to 60 Kin 0 psig D6C Min Sprayt Solution of 6200 ppm Boron and Poc>.bestos Core.any
'j 3 x 108 rede hydrazine solutica maintainad as a pu value Test
- Sequential t of betwcen S.6 aa.d 13.0 ter 399 hrs. T st was 13*10337 R'e?Srt perfor ad em 50C2-13-2 ccble J of a si.milar co struction se 375*F a 58 psig 0 to 13 min e that et p!!cd ir. 7.0. ILT-312
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376*F a 62 p:ig .13 to 15 mLn E^1 "1II 266*F 5 62 pato IL to 23 r.La
'j 337*F 4 60 psig 20 to 25 nin TC;.R fectioi 30 ar.d response to i T. educe from 337'r 25 min to 3.6 hre Co-rent 7.17 GLete to 2e revised Ui 8 6C psig to 242'F ,
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' I a 12 psig 3.6 to 399. hr,
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---- w ---i-tio9 t Pa-t No. 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 chosiges = 2 91.wgly,9 yep;g
, 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
- me-.- -t.,
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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 45 peig 0 to 30 min 324*r at 30 poig 0 to e hr .
- Research Leberatory h9ert F-C359
-;1 N
- u ; .' s r 32/0 FJ:G. 252*F at 16 pnig for 7 C.nys e
.. z 31 A:dG. Reduce from 45 to '
Ophg 33 to 40 min Cyrays 10,003 p;e lesic acid imitered
- mt Transaction Pager T 74 Ott 4 0 psig >60 min wath M.no:3 to a plI of 19.5 thzougrout the ,
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
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- Reduce from 45 to O psig o psig 30 to 60 Min So?ution c,f 0 20 aclar taron as torio .
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8 Prays 0-s hre Solution of borie acid
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i m -o! W 1mt MC10 eat i._ w 0 to ea hsed 1* days at 250*F2rredisted to .5 x 10* zads and agoc at 7./ t ' ' - 200*F 2tC*? tor 7 days , F.{ ;c..r Ca:sie-Esat Tracinf_ 30 to .3 skin 31 Gey serio4 0 to 10 Leo
- 43 . Leduce tram 200*F Fct g , _ . to 153*r Db0 m. s 2c"*r/70 p lg 150*? O t.o 33 au 3ano to 346SF/ to see to 5 man N3:
- /c si; 1.E3 45 psig 113 psig h ein to J tr Recece trosa 45 3) to 60 min 3r6*r/*13 : mig 3 brto 5 hr
- to 0 psig ? 40 via *chco ts '60*F 5istto 5 hr O psag 230 7/10 psig 5 es.d to sN e 74 :e TOP rads 5 he as410 tee to sprays of boricbu:fored acid 313e to 346*F/ 5 tr .md 5 min 0-a hr Solution 113 psig L br as.4 5 sda to 6 i.e
#2,003-2,100 ppe boron) c2. 3 4*r/113 poig 8
- to a pH of 8.5 to 11 with nasirilar solution with a 8 hr to 11 hr
>4 hr 335*F/?S peig 11 hr to 15 hr N pit of 7 to 9 315*T/'as priq 15 hr to a day ,
265*F/23 paig a day to 31 d.ay 212*T/0 psag ion of e Spr.sy: d W.tirxously fer 31 day period solut2,CCO y boron as korte acia 2n.tfe-e vi 2 EeCa to a pt to 9-11. ? Irradiated to 1.5W x 10*12 xr&ds during the 10' rsda 31 cay period. Ma*
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s 62nlifiew tw tem'-t Maver of Mtilf f
- c1 tim T e N n1M_id pose rnetw, ere to ttich ?mde Descrirtion of Acep) cme Fnvironment Bone ,es
*e. g prone ,
~ 3 ;- - % se-imtion C r%S in turbine bicg.1Tarpment
- tilies in Chiller Roots empated tor e
---ae v=1vy 1, 2 w -d't-115- *
-a t-1, 2: 211*P for H: located in Chiller Room 1. Migh axbient t eperestre
.ta of self-cleanir.g duration of steam stischarge in air '
. cf.r.. vicit.ity of chiller roco
; .a n. r s .
intakee
- 30 minutes.
- 2. Migh achter.t reisture 1002 content-F3 for saturated steam, steam discharge - 30 duration of .. .
minutes. x e a
- ratu:e 211*r
- 1. nigt. exeiant eem,wphe:e 9
r.sz.s ir. turbine bles.. Equipmer.t at saturetoo u. T1,X 3.;3 79 - gehn w eg 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,
.r .2. i p carpr.y 211*F for 2.0. N.-24213 lo:sted in 1.111g5 aabient sectatu-odischage in C. .e'.c: 2cc=. eration of eters vicinity of chil2er =com air ir.ta>.t s 30 minut.ee.
- 2. High arbient moisture 10G3 content R1 =
for saturated eters,ste.wr discharge = 33 duration o* nicutos.
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- n. ,- n.an - se rate
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- Scquential Chanito's En74.iecries Report
*** 141 Cated 7h7 29, 137. - v :r - .lat.ieg Tape 200*F 0 to 33 min Ae;rd 153 hr at 121*C ,
- . -r, ; .c s.i.Lg Tapo Pecuee free 280*F 2rradi.ited to 2 x 1G4 rada e e
t1> 150*F 30 to 60 aim 1%*r > 6 0 mir. P)R r.eporare e5 rsig 0 to 33 sin 83 p.aa n24*7 Lor e Four: Recuce from e5 16 psio)?S2*r tor 7 1..y. to o paig 20 to 60 min : pray 10.003 . ipa L.s ac w id tatscz.d
- 0 reig >GO min with hax to a pu og 10.'s ti..vughout 7.2 x 107 rada the We ca;o:uze p6riod.
Sprays 0-4 Pr solution of boric acie Dw'. W,e=ures (2,000-2,100 ppn borog buffered A series of transient cycles each cun-to e p;t of C.5 to it watA usos si:steg or a rise to a specified ressa. . 74 hr similar solution with a. c?:S teTp. for a crecifie$ tish) arut a p3 et 7 to 3 gradual retusa to ini'.Aal cc:s!1tions. 3111owing transie.at cycles 1GO day Temperature = Ana. lysis tCle Calculation 13-133 e: pot.uze to live staan 0 psig, 212*? . *: W ;re.-t Tc?perature Transic razimum calculated s 2rtace temper- for c,.o..ita Tape splices = h tyi steps fipe D-act NSI.M EEJ1 att.re during J niting mJ: is 27C*F which does rct etceed et.alification Chenite's Engineering Rotort 430*F 0 to 2 mia zan am " Description of Accident scsperature et 224=7 g .u Ls 1.o. 1st date<. Ictrsary 29, 137 20 s,* r 2 to 60 mi.n Enviro.ver.t" Cenite t cicecriz.g Esp:t 50. 141. 1,5=r >to rain L2 peig 0 to Lo mia Pre:rure mad udiation - Tart
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Attachment 2
- 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. ._
/
. Attachment 3
- 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 Attachment 4 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
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