ML20087P999

Forwards Info Intended to Close Out SER Open Issue 16 Re Operability Qualification of Mechanical Equipment,In Response to Findings of Pump & Valve Operability Review Team Audit on 840117-20

ML20087P999
Person / Time
Site:	Limerick
Issue date:	04/05/1984
From:	Kemper J PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To:	Schwencer A Office of Nuclear Reactor Regulation
References
NUDOCS 8404100189
Download: ML20087P999 (17)

Text

,

PHILADELPHIA ELECTRIC COMPANY 2301 MARKET STREET P.O. BOX 8699 PHILADELPHIA, PA.19101 JOHN S. KEMPER April 5, 1984 vicencsioc,.y ENG6ha E RONG AND RESE ARCH Docket Nos. 50-352 50-353 Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U. S. Nuclear Regulatory Commiseion Washington, D.C.

20555

Subject:

Limerick Generating Station, Units 1 and 2 Pump and Valve Operability Review Team (PVORT)

Audit of January 17-20, 1984 - PECO Resolution of Open Items

Dear Mr. Schwencer:

We are pleased to provide in the enclosures the information necessary to resolve the finding identified during the subject audit. The finding is summarized below. Uc trust that the enclosed information will assist you in the closeout of SER Open Issue #6 concerning operability qualification of mechanical equipment.

As a result of the subject audit conducted at Limerick Generating Station, the following finding was issued:

"During the PVORT audit, it was noted that the original design parameters for some components were exceeded by the current expected normal operating or accident parameters." From discussions at the audit exit interview, the design parameters were identified as temperature and pressure.

The following is " Action Required for Open Items" from the finding:

"1.)

Review all safety related pumps and valves.

2.)

Identify those equipment items for which the original design parameters were exceeded by the current accident or normal values.

3.)

In each case'for which the original design parameters were exceeded, the applicant should provide justification that pump and valve operability is not adversely affected."

In accordance with the above " Action Required for Open Items", we have completed our review; and the results are included on the enclosures attached.

8404100189 840405 gDRADOCK 05000352 l '

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. Mr. A. Schwencer, Chief Page 2.

In addition, appropriate portions of the LGS FSAR, including Tables 3.9-8 and 3.9-19, are in the process of being revised to provide an up-to-date list of safety related, active mechanical equipment to be consistent with AE/NSSS active safety related equipment lists. These revisions to the LGS FSAR will be submitted as soon as they are available.

. Should any additional.information be required, please do not hesitate to contact us.

Very truly yours, A$r2/- r Enclosures Copy to: See Atta:hed Service List.

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r-cca Judge Lawrence Brenner (w/o enclosure)

Judge Peter A. Morris (w/o enclosure)

Judge Richard F. Cole (w/o enclosure)

Troy B. Conner, Jr., Esq.

(w/o enclosure)

Ann P. Hodgdon, Esq.

(w/o enclosure)

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

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

Mr. Marvin I. Iewis (w/o enclosure)

Charles W. Elliot, Esq.

(w/o enclosure)

Zori G. Ferkin, Esq.

(w/o enclosure)

Mr. Thanas Gerusky (w/o enclosure)

Director, Penna. Emergency (w/o enclosure)

Managerent Agency Mr. Steven P. Hershey

.(w/o enclosure)

Angus Inve, Esq.

(w/o enclosure)

Mr. Joseph H. White, III (w/o enclosure)

David Werson, Esq.

(w/o enclosure)

Robert J. Sugannan, Esq.

(w/o enclosure)

Spence W. Perry, Esq.

(w/o enclosure)

Jay M. Gutierrez, Esq.

(w/o enclosure)

Atctnic Safety & Licensing (w/o enclosure)

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

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

Martha W. Bush, Esq.

(w/o enclosure)

James Wiggins (w/o enclosure)

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

Phyllis Zit=er.

(w/o enclosure)

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ENCLOSURE

• - Review Summary of BOP Active Pumps - Review Summary of BOP Valves

. - Review Summary of NSSS Active Essential Pumps & Valves

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ENCLOSURE 1 4

-Review Summary of' BOP Active Pumps 1.-

Emergency Service Water Pumps Tag No.'s O(A-D) P548 have a maximum -

shut-off -head.of 137 PSI,: and the ESW piping system and the pumps are designed for this pressure. This system is satisfactory.

2.;

RHR Servihe Water Pumps Tag No..'s O(A-D) P506 have a maximum shut-

.off head of 169 PSI'with' the piping system design pressure of 155 PSI. The. system will only experience the 169 PSI less than 17. of its operating time, which is. acceptable in accordance with'ASME Section III-.1973 Ed. ND-3612.3, applicable to Limerick.

3.

Control ' Room Chilled. Water Pumps Tag No. 's O(A&B) P162 have a maximum shut-off head of.110 PSI; however, the piping system is

- designed for 120 PSI,'which the system will never experience during operation.. The. piping system was hydrotested with the pump isolated to protect the pump from any overpressure.

Diesel Oil Transfer Pumps, Tag No. 's 1-(A-D) P514 have a maximum 4.

shut-off head of 31 PSI whereas the associated ~ piping system was designed to 50 PSI. When the piping system was hydrotested the-pumps were isolated to prevent overpressure. The maximum that this system could experience during operation is 31 PSI.

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Safeguard Piping Fill Pumps Tag No.'s 1(A&B) P256 have a ma::imum

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shut-off head of 69 PSI. The safeguard, piping system is designed.

to;150 PSI but will only experience 69 PSI, the shut-off head of the pump. When the piping systems were hydrotested, the pumps were isolated to prevent overpressurization.

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Review Sununary of BOP Valves SH 1/4

. Valve Dat6 ' Valve Valve Data

. System Design /

- Sheet Tag

.Line Sheet Maxinum Cond.

- No..

.No.'s' No.

PD To Pmax max.

T PD To Pmax max T

Remads P -102 49-1F010 HBB-130 125 100 125 100 125 170 125 170 Analyzed to 750 PSI @

-2F010 SCO*F See Notes 1, 7&8 1

55-lF004 HB&-110 125 100 125 100 125 170 125 170 3ee Notes'l & 2, 7

-2F004 2

Sl-1F006A,B HBB-118 140 320 140 320 190 360 190 360

-2F006A,B, 3

51-1F075.

GBB-11 500 320 500 320_

420 360 500 360 Analyzed to 500 PSI @

-2F075 480'F See Notes 3,7

.4 52-127,128

_HBB-134 150 200 150 200 125 212 125 212 See Notes 1 & 2,7

-227,228 18 51-1F040 GBB-104 500 320 500 320 420 360 500 360

. Analyzed to IS00Tsr

-lF049

@ 500*F See Notes 2, 3, 7 & 8

-2F040 GB&-104 500 320 500 320 420 360 500 360

-2F049 18 51-105A,B GBB-109 500 320 500 320 420 360 500 360

-205A,B 20 1F068A,B 2B-103 455 150 455 150 420 480 500 480 See Notes 2 & 3, 7

-2F068A,B 21-52-lF031A,B. GBB-112 420 212 475 212-500 212 550 212 See Notes 3,7

-2F031A,B 27 Sl-1F073 GBC-106 455 150 500 150 420 320 500 320 See Notes 2 & 3,7

-2F073 27 51-1F014A,B GBC-102 455 150 500 150 420 480 500 480

-2F014A,B 35 55-1F095 HBB-144 30 212 30 212 185 366 185 366 See Notes 1,2 & 7

-2F095

'36-55-1F093 HBB-144 65 360 65 360 185 366 185 366

-2F093 36 49-lF080 HBB-145 65 360 '65 360 160 268 160 268

-2F080 36 49-lF084 HBB-145 30 212 30 212 160 268 160 268

-2F084

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38.

51-1F007A-D GB-109 420 320 500 320 420 360 500 360 Analyzed to 151TO PSI ~

-2F007A-D

@ 500'F See Notes 2, 368 39 61-111 HBB-164 150 140 150 140 65 340 65 340 See Notes 1,2 & 7

-211 39 61-131-HBB-165 150 140 150 140 65 340 65 340

-231 40 57-160A,B-HBD-161 :100.150 100 150 150 150 150 150 Analyzed for 175 PSI

-260A,B;

@ 100'F See Notes 1, 2 & 7 T-23/6(pg1) -

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SH 2/4 Valve Data Valve Valve Data System Design /

Sheet Tag Line-Sheet Maximum Cond.

.No.

~No.'s No.

Po To Pmax max T

PD To Pmax max T

Remarks P-103 1

55-lF042 HBB-109 70 212 70 212 125 170 125 170 See Notes 1,2 & 7

-2F042 1

51-lF004A-D HBB-ll7 70 212 70 212 190 360 190 360

-2F004A-D

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.51-125A,B GBB-108 430 170 430 170 420 320 500 320 See Notes 2,3 & 7

-225A,B 2

52-lF015A,B GBB-ll4 445 212 445 212 500 212 550 212

-2F015A,B 2

49-1F060 HBB-101 25 268 25 268 160 268 160 268 See Notes 1,2 & 7

-2F060 2

55-lF072 HBB-108 25 268 25 268 185 366 185 366

-2F072

~P-104 1

49-1F022 EBB-133 1300 170 1500 170 1325 170 1575 170 Valve Analyzed foF

-2F022 max Pd=2160 See Notes 4, 7 2

55-1F007 EBB-129 1396 170 1625 170 1423 170 1707 170 Valve analyzed foF

-2F007 max Pd=2160 See !btes 4, 7 2

55-1F008 EBB-134 1396 170 1625 170 1423 170 1707 170 Valve analyzed for

-2F008 max Pd=2160 See Notes 4, 7 2

55-1F006 EBB-129 1396 170 1625 170 1423 170 1707 170

-2F006 3

55-lF071.

EBB-134 1396 170 1625 170 1423 170 1707 170

-2F071 8

49-lF012 EBB-135 1300 170 1500 170 1325 170 1575 170

-2F012 19 55-lF0ll EBB-134 1396 170 1625 170 1423 170 1707 170 Valve analyzed for

-2F011 max Pd=2160 See Notes 4, 7 P-106 2

61-130 HCB-107 150 140 150 140 65 291 65 291 See Notes 1, 7

-230 2

61-110' HCB-106 150 140 150 140 65 291 65 291

-210

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SH 3/4 V21ve Data Valve Valve Data System Design /

Sheet Tag Line Sheet Maxinum Cond.

No, No 's No.

_ PD To Pmax max Pp TD P T

h ds T

max max P-114A

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61-102,112, HCB-123 150 140 150 140 55 291 55 291 See Notes 6A, 7

-132, 202

-212, 232 10 48-lF006A,B DCA-102 1680 150 1680 150 1500 598 1500 598 See Notes 6B, 7

-2F006A,B 12 49-lF002 HBB-101 75 190 75 190 160 268 160 268 See Notes 6A, 7

-2F002 15 57-116 HBB-125 62 340 62 340 150 340 150 340

-216 26 Sl-156A,B GBC-104 155 95 182 95 420 480 500 480 See Notes 6A, 7

-157A,B

-256A,B (EC-104 155 95 182 95 420 480 500 480

-257A,B 26 Sl-158A,B GBC-103 155 120 182 120 420 480 500 480

-258A,B 28 57-165,166 HBD-161 125 150 125 150 150 150 150 150

-167,169 i

-N s' T-23/6(pg3)

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SH 4/4 General Note: All valves not listed have been reviewed against postulated accident conditions of temperature and pressure and are acceptable.

~ NOTES: P.eferred to under " Remarks" column:

~1)

Valves are designed to standard pressure rating of 150# per ANSI B16.5 which allows a maximum pressure of 275 PSI @ 100 F and 150 PSI @ 500 F.

(Intermediste pressures / corresponding temperatures are per Table 2 of B16.5.)

2)

Material allowable stresses do not vary thru temperature range 0

from 100 F to 650 F for ASME Class' 2 and 3 components.

3)

Valves are designed _t'o standard pressure rating of 300#_ per ANSI B16.5 which allows a maximum pressure of 720 PSI @ 100 F and 625 PSI @ 500 F.

(Intermediate pressures are per Table 3

.of B16.5.)

4)

Valves are designed to standard pressure rating of 900# per ANSI B16.5 which allows a maximum pressure of 2160 PSI @

10G F.

(Alternate pressures / temperatures are per Table 6 of B16.5.)

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5)

Valves are designed to standard pressure rating of 600# per ANSI'B16.5 which allows a maximum pressure of 1440 PSI @

100 F.

(Alternate pressures / temperatures are per Table 5 of B16.5.)

-6)

Valves are designed to standard pressure rating of 1500# per ASME Section III -- 1974 Ed. Table NB-3531-6.

(Flanged end valves 'for 2" and smaller per NB-3513.)

t a)

For carbon steel valves maximum pressure is 3750 PSI

@ 1000F with alternate values per above Table.

b)

For stainless steel (Type 316L) maximum pressure is 2570 PSI @ 1000F with alternate values per above Table.

7)

LAll changes were checked against applicable stress analyses and determined to have no impact. In addition, where pressures y

have'bcen revised, the " actual operating" differential pressure

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requirements for the valve / operator were confirmed to be

'within the qualified range for the valve / operator as supplied.

8)

Valve body is actually a higher pressure rating than required;-

therefore enveloping pressure was ueed in the analysis.

T-23/6 L(pg 4)

ENCLOSURE 3 1 of 8 REVIEW

SUMMARY

OF NSSS ACTIVE ESSENTIAL PUMPS AND VALVES i

NRC PVORT AUDIT GENERIC FINDING:

Findina:

During the PVORT audit it was noted that the original design parameters for some components were exceeded by the current expected normal operating or accident parameters.

Required Action:

1)

Review all safety related pumps and valves.

2)

Identify those equipment items for which the original design parameters were exceeded by the current accident or normal values.

3)

In each case for which the original design parameters were exceeded, the applicant should provide justification that pump and valve operability is not adversely affected.

GE Response:

1)

GE has completed a review of all active essential pumps and valves in the GE NSSS scope of supply.

2)

Table 1 lists all of the active essential pumps and valves in the GE NSSS scope of supply, with the corresponding component design parameters (pressure and temperature, per GE purchase specifications) and the maximum service conditions (i.e., worst case normal or accident pressures and temperatures, per GE system design specifications and process diagrams, except the ATWS transient conditions are excluded).

Under the " REMARKS" column of Table 1, "O.K." means the maximum service conditions are equal to or less than the component design parameters, and no further evaluation effort was required.

3)

For those components which the maximum service conditions exceed the design parameters, the enclosures to Table 1 provide justifi-cation for the exceedance.

ATWS TRANSIENT The GE design basis for ATWS (Anticipated Transient Without Scram) requires that the pressure integrity of the primary pressure boundary components shall be assured for the initial (short-term) peak ATWS conditions under ASME code

-rules for these conditions using Service Level C limits.

None of the components are required to perform any active safety related functions during the initial peak ATWS transient. The subsequent (long-term) peak ATWS conditions are

2 of 8

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considered for the active safety related functions of applicable components; however, these ATWS conditions are within the component design conditions.

Consequently, the peak ATWS transient conditions do not affect the operability of~the active safety related pumps and valves listed in Table 1, and these peak ATWS conditions are not included in the maximum service conditions listed in Table 1.

All components exposed to ATWS transient conditions have been evaluated as acceptable under these conditions in accordance with the GE design basis for ATWS.

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3 of 8 TABLE 1 LIMERICK GE NSSS PUMPS & VALVES COMPONENT PARAMETERS - DESIGN VS. MAX SERVICE CONDITIONS I~

COMPONENT MAX SERVICE DESIGN (1)

CONDITIONS (2)

MPL DESCRIPTION PRESS.

TEMP.

PRESS.

TEMP.

REMARKS B21-F013 MS Safety Relief Valve 1250 575 1250 575

0. K.

821-F022/28-Main Steam Isolation Valves 1250

-575 1250 575 0.K.

C11-F009/182 CRD Solenoid Valves 500 180 105 200 Enc. A.1 C11-F010/180 SDV Vent Valves 1250 280 1250 500 Enc. A.2&B C11-F011/181 SDV Drain Valves 1250 280 1250 500 Enc. A.2&B C11-F160/162/163 ARI Valves 250 215 105 200

0. K.

C41-C001' SLC Pump / Motor 1400 150 1400 150

0. K.

C41-F004 SLC Explosive Valve 1400 150 1400 150

- 0. K.

C41-F029 ~

SLC Relief Valve 1540 150 1400 150

0. K.

E11-C002 RHR Pump / Motor 500 360 290 360

0. K.

E11-F015 RHR MO Valve 1500 575 1500 575

0. K.

~E11-F016 RHR MO Valve.

500 360 500 360 0.K.

E11-F017 RHR MO Valve 1250 575 1250 575

0. K.

E11-F021 RHR MO Valve 500 360 500 360

0. K.

E11-F027

-RHR M0 Valve 500 360 500 360

0. K.

E11-F041 RHR A0 Check Valve 1250 575-1250 575

0. K.

E11-F050 RHR A0 Check Valve 1250 575 1250 575

0. K.

t E21-C001 Core Spray Pump / Motor 500 212 290 212

0. K.

E21-F001 CS MO Valve 150=

500 100 212

0. K.

E21-F005:

CS MO Valve 1360 575 1360 575

0. K.

E21-F006 CS A0 Check Valve 1250 575 1250 575 0.K.

-E21-F037 CS MO Valve

.1360 575 1360 575-0.K.

E41-C001 HPCI Pump 1500 140 1670 140 Enc. A.3 E41-C002 HPCI Turbine 1250 SAT. - 1140 SAT.

0. K.

E41-F005 HPCI Swing Check Valve 1500 100 1670 170 Enc. A.4 E41-F012 HPCI MO Valve 2200 100 1670-170 Enc. A.5 E41-F021 HPCI_Stop Check Valve 150 366_

185 366-Enc. A.6 L

E51-C001 RCIC Pump.

-1500 140 1575 140 Enc. A.3 E51-C002 RCIC Turbine 1250 SAT.

1140 SAT.

0. K.

E51-F001 RCIC Stop Check Valve

-275 100 160-267 Enc. A.6 E51-F014 RCIC. Swing Check Valve

~1500 100-1575 170 Enc. A.6 E51-F019 RCIC M0 Valve 1500 100 1575 170 Enc. A.5 NOTES: '(1) Component Design Parameters per GE Purchase Specifications.

(2) Max Service Condition l Parameters per GE System Design I

Specifications and Process Diagrams, except ATWS conditions are excluded.

(3) Pressure = psig, Temperature = 'F 1 :

(4)' Max. service conditions are shown = component design conditions in many-cases where actual expected max serv. ice conditions are less than~ component design conditions.

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ENCLOSURE A JUSTIFICATION FOR EXCEEDANCE OF DFSIGN PARAMETERS 1.

C11-F009/182 - CRD Solenoid Valves Design pressure is not exceeded.

The design temperature of 180*F is exceeded by the maximum service temperature of 200*F.

A qualification test was successfully performed on the valve using an environment of 200*F plus margin.

Hence the design adequacy of this valve has been demonstrated at the higher maximum service temperature.

2.

C11-F010/180 & C11-F011/181 - SDV Vent & Drain Valves Design pressure is not exceeded.

The design temperature of 280*F is exceeded by the maximum service temperature of 500*F.

The valves supplied are 2,500 # valves, with a body material of SA352LCB.

According to ANSI B16.34-1977, the allowable working pressure for a 2,500 lb. of material SA352LCB at 500*F is 4,850 psig (See Enclosure B).

Further, the 500*F condition occurs after the scram (280*F design temperature) when the valve would have already operated.

3.

~E41-C001 & E51-C001 - HPCI & RCIC Pumps Design temperature is not exceeded. The design pressure of 1500 psig is exceeded by the maximum' service pressure of 1,670 psig for the HPCI pump and 1,575 psig for the RCIC pump.

The basis for the pressure transient is a worst case accumulation of conditions (105% turbine drive overspeed, maximum suction head, maximum discharge pressure at pump shutoff, etc.)

which occurs less than 1% of the operating time.

Paragraph 102.2.4 of the ANSI B31.1.0-1967 code allows 20% overpressure for events which occur less than 1% of the operating time. The 1,670 psig and 1,575 psig peak pressures are within 120% of design pressure (1.2 x 1500 = 1800 psig) as allowed by the code.

Further, operability on the HPCI and RCIC pumps can be addressed with respect to the following criteria:

1)

During any loading or pressurization event the deflections of the l:

pump' case and shaft must not be such that contact at close clearance

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locations, such as wear rings, occurs due to the deflections.

l-2)

No permanent plastic deformation of the pump case and other parts shall take place which cause misalignment of the bearing and seal centerlines and other_ factors affecting shaft and case alignment.

3) 0verpressurization shall not cause failure of the shaft mechanical seal parts such as elastomeric seal-rings, carbon seal parts, or failure of metallic structural parts.

The HPCI and RCIC pumps are assessed as follows with respect to these criteria:

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5 of 8 1)

Review of the pump designs show that their cases are basically symmetrical with shaf t centerlines.

Therefore, deformation of the pump cases and shafts due to overpressure would not be expected to affect bearing or seal clearance.

2)

If it were possible to have some local plastic yielding due to an overpressure condition, the case symmetry would prevent yielding to cause loss of bearing or seal clearances.

Further the pumps have been subjected to vendor hydrostatic tests at 150% of design pressures and subsequently operated satisfactorily.

Hence,'no detrimental plastic deformation occurred at these more severe overpressure conditions.

3)

The seal manufacturer for both the HPCI and RCIC pumps states that the mechanical seals see only suction pressure + 25 psi (i.e.,

s100 psig maximum) and the seal is designed for 1000 psig operating pressure.

Consequently, the pump seals are not affected by these maximum pump discharge overpressure transients.

4.

E41-F005 - HPCI Swing Check Valve The design temperature of 100'F is exceeded by the maximum service temperature of 170*F.

The design pressure of 1500 psig is exceeded by the maximum service pressure of 1670 psig.

Based on.the valve actual wall thickness and the 1968 Nuclear Pump and Valve Code, this valve cannot meet the code allowable pressure at these maximum service conditions.

However, the following rationale is used to justify the exceedance of the design conditions.

This is a Class 2, 600 #

valve, with a body material of A216, Gr. WCB.

a.

The allowable stress is 17,500 psi for temperatures up to 650'F.

Thus, the 170*F service temperature is justified.

b.

The. valve was designed according to the 1968 NP&V Code which did not specifiy a design method for any condition that is a variation from normal conditions.

Therefore, the criteria for Power Piping ANSI B31.1.0 - 1967 are adopted.

Paragraph 102.2.4 of this code allows up to 20% increase above the allowable stress during 1% of the operating time.

Since the maximum pressure of 1670 psig at 170*F is expected to occur less than 1% of the operating time, this allowance is applicable to valve E41-F005.

Based on the valve wall thickness and the provision of Paragraph 104.1.2(a) of B31.1.0, the valve stress at'the maximum service pressure is shown to be within the allowable stress value (17500 psi).

Therefore, the exceedance of the design pressure is also justified.

It can be concluded that valve E41-F005 is justified to maintain its structural integrity under the peak transient conditions.

6 of 8 The internal pressure does not affect the operability of ~ the check valves.

Therefore, operability of the valves is assured even though the peak pressure exceeds the design condition.

5.

E41-F012 & E51-F019 - HPCI & RCIC Motor Operated Valves a.

Pressure Integrity Table 5.1 lists the design conditions, the maximum service conditions and the maximum allowable pressure at the service temperature, of the valves.

The allowable pressures were based on the valves wall thickness, material, and the NP&V Code, 1968, pressure and tempera-

• ture rating tables.

From 1968 NP&V Code, the maximum allowable stress of the valve material (A216, Gr. WCB) is 17500 psi, unchanged for all temperatures up to 650*F.

Therefore, the exceedance in temperature of the valves does not affect the pressure integrity of the valves.

As shown in Table 5.1, the maximum allowable pressure corresponding to the service temperature of the above valves is higher than the maximum service pressure. Thus, the pressure integrity of the valves is assured.

b.

Operability of Actuator Under Peak Pressure

'The Limitorque actuator motor capability is 25 ft-lb for valve

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E41-F012, and 5 ft-1b. for E51-F019. These motor sizes were sele'cted based on a design AP of 1400 psi and 1300 psi, respectively. The Limitorque motor-sizing procedure was used to calculate the maximum required torque to operate against the maximum service pressures of 1670 psig for valve E41-F012 and 1575 psig for valve E51-F019.

This calculation.showed that the motor capability exceeds the required torque by a 2 to 1 margin, approximately. Therefore.the maximum service pressure does not affect the actuator operability.

Table 5.2 summarizes the above results.

7 of 8 TABLE 5.1 PRESSURE-TEMPERATURE RATINGS Temperature Pressure Allowable Press.

Valve Design Service Design Service At Service Temp.

E41-F012 100*F 170*F 2200 psig 1670 psig 2110 psig E51-F019 100*F 170*F 1500 psig 1575 psig 1849 psig TABLE 5.2 ACTUATOR MOTOR SIZING Torque Due to Actuator Motor Valve Design AP-Maximum AP Maximum AP Torque Capability E41-F012 1400 psi 1670 psig 13.4 ft-lb 25 ft-lb E51-F019 1300 psi 1575 psi 2.04 ft-lb 5 ft-lb

8 of 8 6.

E41-F021, E51-F001 & E51-F014 - HPCI & RCIC Check Valves Table 6.1 lists the design conditions, the maximum service conditions and the maximum allowable pressure at the service temperature, of the valves.

The allowable pressures were based on the valve wall thicknesses, material, and the NP&V Code, 1968 pressure and temperature rating tables.

'From the 1968 NP&V Code, the maximum allowable stress of the valve material (A216,13r. WCB) is 17500 psi, unchanged for all temperatures up to 650*F.

Therefore, the exceedance.in temperature of the valves does not affect the pressure integrity of the valves.

As shown in Table 6.1, the maximum allowable pressure corresponding to the service temperature of the valves-is higher than the maximum service pressure.

Thus, the pressure integrity of the valves is assured.

The internal pressure does not affect the operability of the check valves.

Therefore, operability of the valves is assured even though the maximum service pressures exceed the design conditions.

TABLE 6.1 Temperature (*F)

Pressure (psia)

Allowable Press.

Valve Desian Service Desian Service At Service Temp.

E41-F021 366' 366 150' 185 190 psig E51-F001 100 267 275 160 220 psig E51-F014 100 170 1500 1575 2539 psig L

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