ML19321A158

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Submits Reply to IE Bulletin 79-01B Re Environ Qualification of Class IE Equipment.Qualified Limit Switches Have Been Ordered & Are Scheduled for Replacement During Future Outages.Worksheets Encl
ML19321A158
Person / Time
Site: Prairie Island  
Issue date: 07/10/1980
From: Gilberts D
NORTHERN STATES POWER CO.
To: James Keppler
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
IEB-79-01B, IEB-79-1B, NUDOCS 8007220542
Download: ML19321A158 (8)
v • d • e


Text

U Ul. } 4 g g NORTHERN 5TATES POWER COMPANY u s w u sa s.o u s. MIN N E S OTA 5 5409 July 10, 1980 Mr. James G. Keppler Director, Region III Office of Inspection and Enforcement U. S. Nuclear Regulatory Commission 799 Roosevelt Road Glen Ellyn, IL 60137

Dear Mr. Keppler:

PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 and 50-306 IE Bulletin No.79-01B Enclosed are revised system component evaluation sheets for limit switches in the containment purge, main steam and residual heat removal systems. These Revision 3 sheets are replacements for the worksheets sent in our May 12, 1980 response to IE Bulletin 79-OlB. Also enclosed are the Prairie Island annulus temperature and pressure profiles for a design basis LOCA.

NAMCO model D-2400X limit switches, presently used on some control valves for previously mentioned switches, have a NEMA 4 (watertight) enclosure and are designed for a maximum temperature of 90 C (1940F). The only area in the Aux-0 iliary Building which will exceed 1940F is on the 735' level during a HELB.

This area is postulated to rise to temperature and pressure of 210 F, 0.75 psig. This affects the Main Steam Isolation Valves and the Power Operated Relief Valves for #11 and #21 Steam Generators. Due to the expected short duration of the temperature transient above 1940F and the low pressure, we have concluded that the D-2400X limit switch will be adequate and replacement is not necessary.

The limit switches for the containment purge and residual heat removal systems while not subjected to a temperature in excess of 194 F may be subjected to a high radiation level. We have decided to replace those limit switches with NAMCO Model EA-170 whigh are suitable for a typical HELB environment and a radi-ation dosage of 2 x 10 RAD. These switches have been ordered and are presently being scheduled for replacement during the August 1980 and January 1981 outages.

Yours truly, D. E. Gilberts Vice President Power Production cc:

Mr. G. Charnoff NRC Office of Inspection and Enforcement Washington, D. C.

Enclosures 80072205 Q DEG:nk

UNITED STATES NUCLEAR REGULATORY COMMISSION

+

NORTHERN STATES POWER COMPANY PRAIRIE ISLAND NUCLEAR GENERATING PLANT Docket Nos. 50-282 and 50-306 LETTER DATED JULY 10, 1980 RESPONDING TO NRC REQUEST FOR INFORMATION IN IE BULLETIN 79-01B Northern States Power Company, a Minnesota corporation, by this letter dated July 10,1980, hereby submits information in response to NRC request for in-formation concerning IE Bulletin 79-01B.

This request contains no restricted or other defense information.

NORTHERN STATES POWER COMPAh7 By:

D. E. Gilberts Vice President 4

l Power Production 1

On this

/O th day of

,19 h, before me a notary public in and for said County, personally appfared D. E. Gilberts, Vice President Power Pro-duction, and being first duly sworn acknowledged that he is authorized to execute this document on behalf of Northern States Power Company, that he knows the con-tents thereof and that to the best of his knowledge, information and belief, the statements made in it are true and that it is not interposed for delay.

(

i m ne.W JER assept pueLC.emuuteMA em,.E.MN COUNTV MENN

.s e m,n.**

w_-

)

I d)

Rev. 3 SYSTEM COMIONErff EVATJJATION VCPJGHEEP 7/8/80 PrairieIs1,an$g Unit 1 & 2 UNIT:

DOOCT: 50-282 6 50-306 DOCUMn7 RATION REF*

QUALIF OffrSTANDING ENcIiniLWT 10UIRfE27P DESCRIPTION

^ PARAMUTER SPECIFICATION QUAI.IFICAT5'ON SPII.

00ALIF.

MIN 110D ITD1S SYSTEM: Gntmt Purge (ZF ) OPERATIN TD1E 2 llOlfRS 1

Sec Note 2 PIANT ID NO. :

See Note 1 00MPONErff:

TD1P.

Limit Switch 161* F 2

See Note 2 Deg. F MANUFACIURE:

PRESSURE (PSIA) 3 " 11 0 3

See Note 2 NAMCO 2

K) DEL NIEBER:

RELATIVE D 2400 X 1RP1TDITY NOT REQUIRED NONI'

(%)

FUNCTION:

OllMICAL__

Position Indicated NP' REQUIRED NONE

~ ~ ~ "

ACCURACY: SPEr.

NR UIM.W: NR IE;TATION

7 x 10 RADS 1

See Note 2 SERVICE: U-162 Cnt Pur ;9~~~'~~

AGINC Ser Note 2 TOCATION: Annulus 1 & 2, ITd)D IJ9in ELLVI f4T

~SUH-MEIEENCE NOT REOUTRED 7g 7g, pg t_ P,h

  • DO(1MNTWrION PJ3 FID. "T.-

f 1) 1.i mi t switches for valves: CV-31310, CV-313H 1)

Engineering Evaluation CV-31569, CV-11621, CV-31622, CV-31624, 2)

FSAR Fig.. C.3-4 t.\\. 316 > 5 CV-31 114, CV 'li116, CV-115 //..

3)

T'. ik r i. I 1

'r CV-31627. CV-31628, CV-31630, CV-31631, CV-31635, CV-31633

2) th placing switcher wit l* mor!cl TA-170 I'rc se nt achedtih Unit One : Aug 80 linit Two:.Jan 81

Rev. 3 SYSTEM COMPCNENT LVAUJATICd VCPESIITT

~

t 7/8/80 3, g4 UNIT:

Pralric Island 1 & 2 DOCITT:

50-282 & 50-306 NENIW M*

WIF NMIT.

M110m ggggyppi. DFECRIPPICN ~-PAfWILTER SPECIFICATION CK1ALIFICAT10N SPEC.

QUALIP.

IC11100 IT174S SYSTEM. nain c. aux dtml OPERAT]tG IIANI ID NO.: Stm Dump 1 HOUR 2

See Note 2 See Note 1 (MS)

(INPONENT:

'1 DIP.

210*F 194 F 1

3 Limit Switch geg, p M\\NUFAC'IURE:

PRESSURE NAMCO (PSIA) 15.2 psia 14.7pnia 1

3 M) DEL NtNBER:

RELATIVE INDM 1007 Watertight 1

3 NONr.

D2400X

(%)

I: UNCTION: Open & closec. OWN N-indication SPPAY Not required A T UHJ C f: SPDC.

NR NONE RADIATION Not required DUM-gg S G! ICE: MSTV"s & PO Sec Note 3 reliefs ACING I mATION: Aux Bldg

~~T V)i) NDU, ELEV:

NK SUB-None ABOVE FIDOD IIV, EL: NR Not required IN-1)

Switches for Valves:

  • 1X3CLNENTATInN REFM JJK3G:

a) !!SIV's: CV 31098, EV 31099, CV 31 CV 31114 h) S/G PO rel8efs: CV 31084. CV 3110.

]) FSNJ Appendlx I para 1.I1.]

2) See letter NSP to NKC 7/6/80
2) Engineering Evaluation
3) NSP in process <$f contracting for
3) Letter from Robert !!. Kantner-NAMCO to James llof fman-NSP 3/13/78 aging teura.

SYSTDi COMPONDTP LVAI11ATION IDIESIITT Rev. 3 i

7/8/80 Prairie Is"I*a' M UNIT:

nN 1 & 2 DOcu;r:

50-282 6 50-306 DOCUMFREATION REF*

QUALIP OlmimNDITI',

M ID4Dfr EQUIIMDTP DESCRTPTION ~ PARAMLTER SPICIFICATION OUALIFICATION SPII.

QUALIF.

MEDIOD ITDiS SYSTDe. nain a aux :>rm/

OPER4TlfC PLABTI ID 113.. Stm Dump 2

TIME 1 Il0UR See Note,2 See Note 1 (M3) 00MPONDE:

TD1P.

194*F 1

3 NONE Limit Switch Deg. F 180*F MANUFACiURE:

PRESSURE NAMCO (psia) 15.45 psia 14.7 psia 1

3 See Note 2 PODEL NtFEER:

RELATIVE IIU4IDITI 100%

Watertight 1

3 NONF D2400X

(%)

MJNCTION: Open 6 closet CIID11CE indication NONE SPRAY Not required ACXViU\\CV: SPFL'.

NN

'40NE DGYE3: FR RAl>IAT10N Not required 12'& 22 S/G SEIFICE:

PO reliefF AGING See NOTE 3 II) CATION: Aux Bldg T100D LEV, EL EIA,V:

I'K Syg-E None ABOVE FII)OD LEVEL: NR Not required I@T *

  • IOCtND7 FAT 10N REFD'DDT.:

1)

Limit switchen for val $es: CV 31089,

~ ~ ~ -

~

CV 31107

1) FSAR Appendix I para I.11.1
2) See letter NSP to NRC 7/8/80.
2) Engineering Eval.atfor
3) NSP in p:ote s of contr act ing for
3) Letter f r om Robert Kantner-NNtCO t -

aging testa.

Jamec I!offman NSP 3/13/78 e

e

Rev. 3 SYSTDi OTOONDTP EVATUATION VOPESilEr:p 7/8/80 PrairieINP

&2 UNIT:

DOCKPT: 50-282 & 50-306 S

~

' FINJID4lW DOCU?HWTATION REF*

QUALIF OutdnV)ING f

PARVETER 55SfCIFICATION C(IALIFICATION Spir.

QUALIF.

MFIDIOD ITU4S W E W P DESCRIP M SYSTD4: Nesiciual ficat OPERATING None PIAVP ID TO.:Penoval(RII)

TK See Note 1 COMPONENT:

TD1P.

None Limit Switches Deg. F Not Rcquired i

MMUFACIURE:

PRESSURE Nonc Namco (PSIA)

Not Required P0DIL NW1BER:

RELATIVE None D2400X 1RMIDI"Y Not Required gg PUNCTION: Open/ Closed CilhN G\\L None IrxlicaLion SDRAY Not Itquired

~~

ACCUP1CY: SP}C.

13t See tote 2 5

1 3.6 X 10 RAD SERVICE: RIIR F.lcw See Note 2 IOCATION: Aux Bldg Not Required

~ 1IDOD IJNEL E11V: Nlt SUB-MD0DCF None j

N E

E Not IV. quired Y_U. TTS. -

  • frG__ WTIA_T.1o_N _TE_X_E_.Pr. _<I.S_ :

U Switches for Valves: LV-3128 thru CV-31240

1) FSAR Section 7 Page 7.5-12 2)

Re1 lacing with mndel F A-170.

Pr sent schedule L. nit One: Aug. 80 Unit *1Vo:. Tan. 81

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