ML20211D083

Responds to IE Bulletin 85-003, Motor-Operated Valve Common Mode Failure During Plant Transients Due to Improper Switch Settings. Design Basis Differential Pressure Info & Scope of Testing Discussed.Related Correspondence

ML20211D083
Person / Time
Site:	Limerick
Issue date:	10/02/1986
From:	Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Murley T NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
CON-#486-1154 IEB-85-003, IEB-85-3, OL, NUDOCS 8610220096
Download: ML20211D083 (14)

Text

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PHILADELPHIA ELECTRIC COMPANY 23O1 MARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 JOHN S. KEMPER VIC E-PR ESID E NT E NGtNE E RONG AND GP ESE ARCD4 Dr. Thomas E. Murley Docket Nos. 50-352 Regional Administrator, Region I 50-353

.U.S. Nuclear Regulatory Commission 631 Park Ave.

King of Prussia, PA 19046

Subject:

Limerick Generating Station Units 1 & 2 I.E. Bulletin 85-03, " Motor-Operated Valve Common Mode Failure During Plant Transients Due to Improper Switch Settings"

Reference:

Letter from J. M. Taylor, NRC to J. M. Fulton (BWROG),

Chairman, BWR Owners Group, deted June 8, 1986

Dear Dr. Murley:

This submittal provides Philadelphia Electric Company's (PECo) response to I.E. Bulletin 85-03. The referenced letter granted an extension for this submittal until October 1, 1986 to participating member utilities on the Boiling Water Reactor Owners Groups (BWROG)

Ad Hoc Committee for I.E. Bulletin 85-03. PECo was a full funding l active participant in the BWROG Effort. In summary, this submittal contains the required design basis differential pressure information, scope of testing, and the schedule for completion of the remainder of the program for Limerick Generating Station (LCS) as required by Item (e) of Bulletin 85-03. PECo's program is based on the findings of the

[ BWROG study chartered to develop a generic position for items required for inclusion in this submittal. The requirements of the Bulletin are restated below along with PECo's responses.

Requirements of Item (a):

Item (a) of I.E. Bulletin 85-03 stated: " Review and document the design basis for the operation of each valve." (The motor-operated valves in the High Pressure Coolant Injection (HPCI) and the Reactor l Core Isolation Coolant (RCIC) systems) l'This documentation should include the maximum differential pressure expected during both opening and closing the valve for normal and abnormal events ...".

8610220096 861002 PDR ADOCK 05000352 G PDR

\D,i

v Response to Item (a):

PECo used the BWROG developed methodology to calculate the maximum operating differential pressures of those subject valves which have an active safety function. For HPCI/RCIC motor operated valves (MOV) with no active safety function, a conservative methodology was used to calculated the maximum differential pressure. The attached table provides the pertinent valve information related to safety function and maximum design basis differential pressure.

A review of this data showed the computed maximum operating differential pressure to be less than the original specified design values for each of these valves having an active safety function except for, HV-55-lF012 (HPCI Minimum Flow Valve) and HV-55-lF042 (H.PCI Suppression Pool Suction Valve).

These valves have a computed design basis differential pressure which is only marginally above their original specified valucs. A review of MOVATS data for these valve indicates the actual thrust generated by the motor operator is sufficient to operate the valve against the higher differential pressure. The valve specification will be revised to reflect the as-built (and evaluated) capability of the valve.

i Requirements of Item (b):

Item (b) of I.E. Bulletin 85-03 states: "Using the results from Item (a), establish the correct switch settings. This shall include a i program to review and revise, as necessary, the methods for selecting and setting all switches (i.e. torque, torque bypass, position limit, i overload) for each valve operation (opening and closing)."

, Response to Item (b):

! PECo implemented a program to determine correct switch settings l du?ing the construction phase at LGS Unit 1. A similar program is being implemented for Unit 2. The program consists of the following elements:

1. The valve vendors are required to supply the valve operating ~

forces as part of the valve documentation. In addition the torque switch settings are also supplied.

2. An independent review of the torque switch settings is performed by Bechtel Power Corporation (BPC).

3. With the exception of limit seated butterfly valves operating under relatively lev differential pressure conditions, all torque switch settings for safety-related valves are verified using the Motor Operated Valve Analysis and Test System (MOVATS).

_, --- . . - . , ,~,-,.-__-..---m_, . , . - . , - - - - . , _ - . _ . _ _ - , _ . , .._.- _ _ ,__-_---.__..--_-,_,_ _ _ _ . - . _

4. All personnel involved in the setting.of MOV limit switches are instructed in their proper setting. Specifically, this requires the open torque switch bypass to remain closed until the valve is unseated and that the open limit be set such that the disc does not coast into the backseat. These settings are documented in the test records.

5. The overloads are sized in accordance with the special requirements for MOV's by BPC (Calculation 6900E.13).

6. Maintenance procedure PMQ-500-0087 maintains the correct setting of switches.

PECo participated in the development of the MOVATS system. This system was used on more than 400 MOVs at Limerick prior to fuel load.

Over 100 MOVs have been MOVATS tested at Limerick Unit 2 to date.

Requirements of Item (c):

Item (c) of I.E. Bulletin 85-03 states: " Individual valve settings shall be changed, as' appropriate, to those established in item (b) above. Whether the valve setting is changed or not, the valve will be demonstrated to be operable by testing the valve at the maximum differential pressure determined in Item (a) with the exception that testing motor-operated valves under conditions simulating a break in the line containing the valve is not required.

Otherwise, justification should be provided for any cases where testing with the maximum differential pressure cannot practically be performed. This justification should include the alternative to maximum differential pressure testing which will be used to verify the corrective settings."

Response to Item (c):

i As described in section (b), the motor-operated valves at Limerick Unit I have been set and tested in accordance with a program developed to

' assure their proper operation. This program is in progress for Unit 2.

This testing assures that sufficient margin is provided for valve operation during design basis conditions (i.e. maximum differential pressure).

Requirements of Item (d):

Item (d) of I.E. Bulletin 85-03 states: " Prepare or review procedures to ensure that correct switch settings are determined and maintained through out life of the plant."

1

Response to Item (d):

Procedures EE11.10, FE-14 and FE-16 are used prior to initial fuel load for original valve setup;.these and Limerick Maintenance Procedure PMQ-500-0087 are then used to ensure the correct. switch settings are maintained.

Philadelphia Electric Company will submit a formal report in accordance with item (f) of I.E. Bulletin-85-03 by November 15, 1987. Testing at Limerick Unit 2 will be completed by the initial fuel load.

Sincerely,

[, '1/'*2_

. f' TSN/pdO9308601 Copy.to: E. M. Kelly, Resident-Site Inspector USNRC, Document Control Desk i

i f

cc: Troy B. Conner, Jr. , Esq. (w/o enclosure)

Benjamin H. Vogler, Esq. (w/o enclosure)

Mr. Frank R. Ronano (w/o enclosure)

Mr. Robert L. Anthony (w/o enclosure)

Ms. Maureen Mulligan (w/o enclosure)

Charles W. Elliot, Esq. (w/o enclosure)

Barry M. Hartnen, Esq. (w/o enclosure)

Mr. Thones Gerusky (w/o enclosure)

Director, Penna. Energency (w/o enclosure)

Managenent Agency Angus R. Love, Esq. (w/o enclosure)

David Wersan, Esq. (w/o enclosure)

Robert J. Sugarnen, Esq. (w/o enclosure)

Kathryn S. Leals, Esq. (w/o enclosure)

Spence W. Perry, Esq. (w/o enclosure)

Jay M. Gutierrez, Esq. (w/o enclosure)

Atanic Safety & Licensing (w/o enclosure)

Appeal Board Atanic Safety & Licensing (w/o enclosure)

~ Board Panel Docket & Service Section (w/o enclosure)

Mr. E.'M. Kelly (w/o enclosure)

Mr. Tinothy R. S. Campbell (w/o enclosure)

-_ ~

~

=

cc: TroV'B. Conner, Jr., Csq~._. (w/o enclosure)

Benjamin H. Vogler, Esq. (w/o enclosure)

Mr. Frank R. Romano (w/o enclosure)

Mr. Robert L. Anthony (w/o enclosure)

Ms. Maureen Mulligan (w/o enclosure)

Charles W. Elliot, Esq. (w/o enclosure)

Barry M. Hartman, Esq. (w/o enclosure)

Mr.. Thomas Gerusky (w/o enclosure)

Director, Penna. Emergency (w/o enclosure)

Management Agency Angus R. Love, Esq. (w/o enclosure)

David Wersan, Esq. (w/o enclosure)

Robert J. Suganmn, Esq. ~(w/o enclosure)

Kathryn S. Lewis, Esq. (w/o enclosure)

Spence W. Perry, Esq. -(w/o enclosure)

Jay M. Gutierrez, Esq. (w/o enclosure)

Atomic Safety & Licensing (w/o enclosure)

Appeal Board Atcmic Safety 'S Licensing (w/o enclosure)

Board Panel Docket & Service Section (w/o enclosure)

Mr. E. M. Kelly (w/o enclosure)

Mr. Timothy R. S. Cartpbell (w/o enclosure) bcc (w/o enclosure): V. S. Boyer J. S. Kemper S. J. Kowalski L. B. Pyrih D. R. Helwig G. J. Beck T. S. Neckowicz W. J. Boyer W. J. Mindick W. J. Coyle B. J. 'urry R. A. Mulford J. T. Robb C. W. Wiedersum E. J. Cullen J. C. Nagle W. M. Alden C. R. Endriss C. A. Aldridge (Chron)

R. D. Cronin/A. C. Collinge M. S. Iyer (Bechtel)

NES Chron DAC (NG-8)

COMMONWEALTH OF PENNSYLVANIA :

ss.

COUNTY OF PHILADELPHIA  :

J. S. Kemper, being first duly sworn, deposes and says:

That he is Vice President of Philadelphia Electric 1

Company; that he-has read the foregoing response to I.E. Bulletin 85-03 and knows the contents thereof; and that the statements and matters set forth therein are true and correct to the best of his knowledge, informati(n and belief.

01

,-- C K,L-Subscribed and sworn to before me this day of 1

Notary Public l

l l

i '

EB 85-03 MOTOR OPERATED VALVE Li MERICK 'GS '

. DESIGN BASIS

SUMMARY

PHILADELPHIA ELECTRIC CO.

p&lD NORMAL BW ROG SAFETY MAXIMUM SUBJECT

! . DESCRIPTION POSITION REPORT DESIGN BASIS TO TEST i VALVE NO, SIZE /T. PE I D. N O. CLASS (It AP (OPEN/CLOSE)@ @ MAX 6P ($

f (M-55 H PCI- -

R\/-55-I Flo5 lwyecTioW VALVE CtostD 1 .S AF(o) ((180 /IIBO)psd YES To FEEDWATER S " G ATE.

. NV-5 5- IF006 I4IEcTto N VALVE CtoSEE lh SAF (ol (ll%[llBOIpid YEs To CORE. SPR6Y ll" G ATE

. ~,

Ctosto HV-55-lFO12 Misimom FooW 2' saF@ M/dp Yes i BYPASS VALVE 4" 6toBE H v-55-lFDO4 Coe9ENSATE STORAGE CfErd 3 ggp(c) (- /2.3) pd ' YES tac. sucTiod VALVE tv Gare.

! - HV \F041 - 90FM.55tod foot- CLOS CD 4-j seated IsotATied SAF(0/c) ( ct 4/ 52_)731 1 yes' i YALVE' ib GnTE'

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j Hv-5 5 - \F042 S vPpecssiod Poo \- CL os E D

( 94/ 52.\Ps;d YES g:

soc. Tion Isot* Tion gg3 ,gq 4a- S AF (0/c) vatva

• SHEET I 0F 7 i-

IEB 85-03. MOTOR OPERATED VALVE LlMERICK GS DESIGN BASIS

SUMMARY

PHILADELPHIA ELECTRIC CO.

P&ID NORMAL- BW ROG ' SAFET Y MAXIMUM SUBJECT I DESCRIPTION POSITION REPORT DESIGN BASIS TO TEST i VALVE NO. CLASS (I). AP (oPEN/CLOSE)@ @ MAX 6P G

! SIZ E/T.YPE I D. N O. -

M-55 HPCI .

HV lF00B CST TEST RETURd CLOSED 5 MS AF. (- //2/2 P5Id No

VALVE l 0" GLoeg 14 V \ Foll- cst TESTISOLATioN ctosED NSAF (- /Il8T PSid NO

. VALVE G

10 " GATE HV-55-lFO'll RPcI/ RCiC TEST CtosEt } gggp [23[44)p5;d NO FLosa _TsotATION VALVE 4" Gau HV-55-IF007 TNTECTION .VAulE 09C4 g NSAF (147 i / ') ps;d No TEST YALVE 14" GnTE M-56 NFcI.

l[  ;

MV-56-\F059 Teae Acessoay Coouncy VIATert CLoSE O 9 $AF(o/cl 55/5 5) ps,d NES 2 M 6

j VALVE

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.:1 SHEE'T 2 oF 7

' I IEB 85-03 MOTOR OPERATED VALVE LIMERICK GS

. DESIGN BASIS

SUMMARY

PHILADELPHIA ELECTRIC Co.-

1 i P&ID '

NORMAL BW ROG SAFETY MAXIMUM SUBJECT

! . DESCRI PTION POSITION REPORT DESIGN BASIS TO TEST VALVE No.

l SIZE /T. PE I D. N o. CLASS (1) op (oPen/ctosE)e) @ MAX 6P (3 -

] n-ss HPcr HV-55-IFoo t STEAM ADMsssioA C'osED ggp(o/c) ygs l J ( ,3ggg)g.g VALVE.  !?." GATE T N E \ ' Geogg CPE A "# NO

- HV lFoo3 STEAM LiNE coTBMG $g p(cd h 130/ll3Cd psQ TsoLATioN VALV G 10" G LO 66.

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- HV-55-lFloo Bypass VALVE Fo G., C Lose D ooreone swn% iygc,t,y Y sarcca (itso/iiso)psa >go E R104 VALVE 1

, H v-55-IFo72 TOR 6tWE ExmosT

'IsomTtar4 YALVE OPEM IT' GATE g ggg-(g { __ /g p3Q g.

i

! Hv-5s-tro e vmoo n arwea ceta Yll sarcd ( - / 5 C p3; a No dnd LinE Isot ATt od 4" GCATE HV- 55 -IF095 htv ES YU1.

SHEETT 3 oF 7

i IEB 85-03. MOTOR OPERATED VALVE LlMERICK GS DESIGN BASIS

SUMMARY

PHILADELPHIA ELECTRIC CO.

~P&ID NORMAL BW ROG SAFETY MAXIMUM SUBJECT.

! DESCRIPTION POSITION REPORT DESIGN BASIS TO TEST.

l VALVE NO. SIZE /T PE ID.NO. CLASS (1) op (OPEN/CLOSE)@) @ MAX 6P Gl

! M-49 Rcic i

• i HV-49-lF013 IN.TECTION VALVE CtosEt 33p (o)- (l \+9 [1349) ps;J VES 1

lo" GRTE

. HV-49-lF019 1%inon Fw ctosed g- SAF(o/c) (1278 /1218)psa YE s' 8YeAss VALVE 2." etose

HV-49-IFo\0 CodDENSATE STBRME OPEN 3 SAF(C) ( __ / g p3;g YES TANK SocTioW VALVE

~(o+ caTe HV-49-IF029 SUPPRESS 10iV POOL Clos ED A SAF(o/c) (g, / 5 5) psi 4 T65 H 49-\F03) yf k5 HV-49-IF02?. CST TEST RETORd Ci.o s f. D NSAF l-

[ VALVE 5 (- / I 2. I 2.) P5N Mo.

4" GLo6C HV- 4cl -lF002. VAcuort Pump To <Dec a ggpb j}

50PPRe551OrJ PCOL q (- / 44-) PS d i

2" 5TdP/cir.ct

-! 150LATiorJ V ALV E SHEET 40F'[

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l ji IEB 85-03 MOTOR OPERATED VALVE Li MERICK GS -

DESIGN BASIS

SUMMARY

PHILADELPHIA ELECTRIC CO.

! NORMAL BW ROG SAFET Y MAXIMUM SUBJECT P&lD POSITION REPORT DESIGN BASIS TO TEST

! DESCRIPTION

! VALVE NO. SIZ E/T.YPE I D. NO. CLASS (I) op (OPEN/CLOSE)2) @ MAX 6P (3) i 7j M-49 BC. ( C.

HV IFol2_ It4TECTior4 VALVE OPE tJ 8 'NSAF- (- A 2.55)esd No I TEST VALVE Co" G ATE HV \FO% ToaBME Accessoay ctosu> 'YES Cootar4cs \JATER VALVE ct SAF(o/c) (12.87 /58)psid 2" GLo8E HV-49-)F04-5 STEAM Armssiota CLOSED () 13o / Il30)ps;6 YES VALVE G~ G.toeg SAF(0/C) i 09E4 Sgp(c) ( 1130/1 B 0 Pd NO HV lF007 STEAM UPJE NBOARD IsotATicid VALVE 3" GLo6 C

{

r NE d gap (c} ((l3OfII30PSiJ No l HV-49-WOO 3 STEAri LttJE OOTBoAR0 3~SotATiord VALVE 3" Gcoat

{

j W-49-iron synss vatve Foa. c tosco y sarcc) 6:3o/ iiso) esta No

ooTeonao stear 4 gif," gtog, j

IsotATsow VALV E SHEET 5 or 7 t*

1 IEB 85-03 MOTOR OPERATED VALVE LIMERICK GS DESIGN BASIS

SUMMARY

PHILADELPHIA ELECT,RIC CO, j P&lD NORMAL BW ROG SAFETY MAXIMUM SUBJECTi DESCRIPTION POSIT!ON REPORT DESIGN BASIS TO TEST

! VALVE NO. SIZ E/T YPE I D. N O. C LASS (I). AP (OPEN/CLOSE)Q) @ MAX 6P G .

I i M-49 RctC i

~j Hy-49-IF060 TOR 6 4E EximosT OPEG j ISOLATION VALVE B C4 rE.

[ SAFCCT (- /44 ) P5ra No i 1 -

l i

Hv IFOBO Weoos ?>acateg hd 'LiNe IsoLAriora OPeo y e n r e.

g 3gp(c) ( - / S ct) P5id No ,

Hv- 49-IF084- yAtygs g _

t t

i t

t

~

I SHEgr 6 or7

T NOTES FOR MOTOR OPERATED VALVE DESIGN BASIS

SUMMARY

- LGS (1) The listed safety classifications delineate the active safety functions, which are considered to be within the plant design basis, of all valves subject to IEB 85-03. These safety classifications were established as part of the BWROG effort to develop a comTran BWP, methodology that individual utilities may utilize in responding to the bulletin. PECo concurs with these classifications as they relate to the requirements of IEB 85-03 with the following addition to account for a non-generic design feature:

The HPCI steam admission valve (HV-55-1F001).has an active safety function to close for reactor isolation.

L The classifications are:

SAF(0), SAF(C), SAF(0/C) - Active safety function identified in open, close and open/close directions, respectively. NSAF - No active safety function Identified within the plant design basis.

(2) The listed differential pressures represent the neximun expected values which the valves would be subjected to during operation simultaneous with events considered within the plant design basis. For those valves that the BWROG considered as having an active safety function, the values were generated by nethodologies developed by the BWROG. Maximun operating differential pressures for all other valves were generated fran conservative nethodologies developed outside the scope of the BWROG. In all cases, the noximun operating differential pressures shall form the basis for establishing the minimun torque switch settings.

(3) Valves subject to noximun differential pressure testing (or acceptable alternate) are those identified as having an active safety function with the exception of those valves whose sole safety function is for isolation of a line break. Valves falling in this category include the stean line isolation valves. These valves will be tested to the extent practical.

SHECT f or 7 TSN/pdO9158607