ML20097B953

GL 89-10 Close-Out Submittal Vol 2 Design-Basis Capability Verification Rept

ML20097B953
Person / Time
Site:	Vogtle
Issue date:	01/31/1996
From:	GEORGIA POWER CO.
To:
Shared Package
ML20097B940	List: ML20097B936 ML20097B945 ML20097B953
References
GL-89-10, NUDOCS 9602080026
Download: ML20097B953 (108)

Text

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O Vogtle Electric Generating Plant Generic Letter 89-10 ciose-out submittai O

Volume 2 Design-Basis Capability Verification i

Report January 1996 O

788 188ER 888ssi24 P

PDR

V(3 TABII OF CONTENTS j

1.0 INTRODUCTION

1-1 2.0 ANCHOR-DARLING GATE VALVES 2-1 2.1 Anchor-Darling Group AD-1 Gate Valves 2-3 2.2 Anchor-Darling Group AD-2 Gate Valves 2-6 2.3 Anchor-Darling Group AD-3 Gate Valves 2-8 2.4 Anchor-Darling Group AD-4 Gate Valves 2-10 3.0 WESTINGHOUSE GATE VALVES 3-1 3.1 Westinghouse Group W-1 Gate Valves 3-3 3.2 Westinghouse Group W-2A Gate Valves 3-5 3.3 Westinghouse Group W-2B Gate Valves 3-8 3.4 Westinghouse Group W-3 Gate Valves 3-11 3.5 Westinghouse Group W-4 Gate Valves 3-13 3.6 Westinghouse Group W-5 Gate Valves 3-15 3.7 Westinghouse Group W-6 Gate Valves 3-20 l

3.8 Westinghouse Group W-7 Gate Valves 3-24

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3.9 Westinghouse Group W-8 Gate Valves 3-27 3.10 Westinghouse Group W-9 Gate Valves 3-31 3.11 Westinghouse Group W-10 Gate Valves 3-33 3.12 Westinghouse Group W-11 Gate Valves 3-37 3.13 Westinghouse Group W-12 Gate Valves 3-40 3.14 Westinghouse Group W-13 Gate Valves 3-44 4.0 FISHER GLOBE VALVES 4-1 4.1 Fisher Group FG-1 Globe Valves 4-2 4.2 Fisher Group FG-2 Globe Valves 4-4 4.3 Fisher Group FG-3 Globe Valves 4-6 5.0 VELAN GLOBE VALVES 5-1 5.1 Velan Group V-1 Globe Valves 5-3 5.2 Velan Group V-2 Globe Valves 5-5 5.3 Velan Group V-3 Globe Valves 5-9 6.0 FISHER BUTTERFLY VALVES 6-1 6.1 Fisher Group FB-1 Butterfly Valves 6-2 6.2 Fisher Group FB-2 Butterfly Valves 6-4

1' 4

6.3 Fisher Group FB-3 Butterfly Valves 6-11 6.4 Fisher Group FB-4 Butterfly Valves 6-14 6.5 Fisher Group FB-5A Butterfly Valves 6-18 6.6 ' Fisher Group FB-5B Butterfly Valves 6-21 i

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1.0 INTRODUCTION

The objective of this document is to outline the basis forjustifying that each of the valves included in the VEGP GL 89 10 program is be capable of performing its design-basis function. To support this objective the valves included in the VEGP GL 89-10 program have been divided into 30 valve groups as outlined in Table 1-

1. The valves in each group are identical with respect to manufacturer, type, size and pressure class. In certain cases the valve stems and/or the valve operators may be different; however, the internal construction of all of the valves within a i

specific valve group are identical.

The basis for many of the capabilityjustifications outlined in the VEGP GL 89-10 Design-Basis Capability Verification Report are founded largely in detailed engineering calculations performed utilizing conservative methodologies which have evolved over the course ofimplementing this program. The analytical methodologies have been validated based on an extensive in-situ differential pressure test program which included tests on 83 of the 256 valves included in the VEGP GL 89-10 program. In many cases the analytical methodologies being utilized were revised substantially based on the results of these tests. Although differential pressure tests could not be performed on valves from each of the valve groups, sufficient testing was performed on the various valve types to provide a high degree of confidence in the overall methodology.

i The most conservative basis for ensuring that a valve will be capable of performing its design-basis function is to test the valve under design-basis differential pressure conditions. In cases where valves have been differential pressure tested in-situ at VEGP these tests are the primaryjustifications for valve 4

capability. Tests of similar valves at other facilities also provide a strong basis for demonstrating capability, and in some cases credit has been taken for differential pressure testing performed by EPRI in conjunction with the Performance Prediction Program (PPP).

Although the in-situ differential pressure testing provides a basis for verifying the capability of tested valves, the primary objective of the VEGP differential pressure test program was to validate the analytical methodology utilized in the design review calculations. Validating the design review methodology in this manner allows non-tested valves to be evaluated analytically, and valve capability to be demonstrated based on calculated margins. A detailed discussion of the design review methodology, the differential pressure test results and the subsequent reconciliation of the differential pressure test results with the design review methodology is contained in the Program Summary Report.

O It should also be noted that the margins identified in this document are based on differential pressures which include consideration of valve mispositioning. It is anticipated that Supplement 7 to GL 89-10 will delete the requirement that valve 1-1

mispositioning be addressed in conjunction with GL 89-10 for PWRs. However, mispositioning differential pressures are included in the current VEGP calculations. In cases where margins are limited based on mispositioning differential pressures, credit is taken for the actual safety function differential pressure and is so noted.

Table 1-1 Valve Groups Group Manufacturer Valve Valve ANSI Total No.

Type Size Rating Valves i

AD-1 Anchor-Darling Gate 2.5 Inch 1500 lb 3

J AD-2 Anchor-Darling Gate 3.0 Inch 1500 lb 2

]

AD-3 Anchor-Darling Gate 4.0 Inch 150 lb 4

AD-4 Anchor-Darling Gate 4.0 Inch 900 lb 6

W-1 Westinghouse Gate 3.0 Inch 150 lb 2

W-2A Westinghouse Gate 3.0 Inch 2035 lb 8

W-2B Westinghouse Gate 3.0 Inch 2035 lb 8

W-3 Westinghouse Gate 4.0 Inch 150 lb 4

b W-4 Westinghouse Gate 4.0 Inch 900 lb 4

W-5 Westinghouse Gate 4.0 inch 1525 lb 16 W-6 Westinghouse Gate 6.0 Inch 150 lb 14 W-7 Westinghouse Gate 8.0 Inch 150 lb 6

W-8 Westinghouse Gate 8.0 Inch 316 lb 12

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W-9 Westinghouse Gate 8.0 Inch 1525 lb 4

W-10 Westinghouse Gate 10.0 Inch 150 lb 12 W-11 Westinghouse Gate 12.0 Inch 316 lb 4

W-12 Westinghouse Gate 12.0 Inch 1525 lb 10 W-13 Westinghouse Gate 14.0 Inch 316lb 4

FG-1 Fisher Globe 0.5 Inch 1710 lb 2

FG-2 Fisher Globe 2.0 Inch 900 lb 4

FG-3 Fisher Globe 4.0 Inch 900 lb 16 V-1 Velan Globe 1.0 Inch 1500 lb 2

V-2 Velan Globe 1.5 Inch 1500 lb 12 V-3 Velan Globe 2.0 Inch 1500 lb 22 FB-1 Fisher Butterfly 4.0 Inch 150 lb 4

FB-2 Fisher Butterfly 8.0 Inch 150 lb 28 FB-3 Fisher Butterfly 10.0 Inch 150 lb 10 FB-4 Fisher Butterfly 18.0 Inch 150 lb 16 y/

FB-5A Fisher Butterfly 24.0 Inch 150 lb 8

FB-5B Fisher Butterfly 24.0 Inch 150 lb 4

1-2

(VD 2.0 ANCHOR-DARLING GATE VALVES There are a total of 20 Anchor-Darling gate valves included in the VEGP GL 89-10 program. The valves are all of the flex-wedge design and utilize carbon steel discs and valve bodies. The disc guide slot and body guides are also carbon steel and the disc face and body seats are hardfaced with Stellite. These valves have been divided into four groups ofidentical valves as outlined in Table 2-1.

Table 2-1 Anchor-Darling Valve Groups i

Group Manufacturer Valve Valve ANSI Total No.

Type Size Rating Valves AD-1 Anchor-barling Gate 2.5 Inch 1500 lb 8

AD-2 Anchor-Darling Gate 3.0 Inch 1500 lb 2

AD-3 Anchor-Darling Gate 4.0 Inch 150 lb 4

AD-4 Anchor-Darling Gate 4.0 Inch 900 lb 6

The thrust requirements for the valves in groups AD-1, AD-2 and AD-4 were 3

(d calculated with the EPRI Performance Prediction Program (PPP) methodology utilizing the default friction coefficients. The thrust requirements for the valves in group AD-3 were calculated with the Industry Standard Equation utilizing a 0.5 valve factor since the EPRI PPP methodology does not apply to air systems. This methodology is discussed in more detail in Section 3.3.1.1 of the Program Summary Report.

The Anchor-Darling valves are equipped with valve stems utilizing stub ACME threads and a stem friction coefficient of 0.20 was utilized in calculating the stem factors for these valves. The basis for utilizing a 0.20 stem friction coefficient for these valves is outlined in Section 9.6 of the Program Summary Report.

The opening and closing capability margins were calculated for each of the valves in these groups. In addition, for valves which are controlled in the closing direction by a torque switch, the closing setup margin is also included. The setup margin takes into account test equipment accuracy, torque switch repeatability and Load Sensitive Behavior and for the purposes of this document values of 10%,5% and 20% respectively were utilized to account for these uncertainties. In practice, the values utilized for test equipment accuracy and torque switch repeatability would be determined based on each specific valve setup. Section 4.0 of the Program Summary Report discusses the various margins in detail and outlines the basis for determining the adjustments necessary to account for test O'

equipment accuracy, torque switch repeatability and Load Sensitive Behavior.

2-1

i In reviewing the various margins contained in this document it should be noted j.

that the margins are based on the MOV's as-modified configuration. A total of i

six Anchor-Darling valves are scheduled to be modified in the 1996 refueling j

outages and the margins outlined in this document reflect those modifications.

Section 6.2 of the Program Summary Report identifies the valves to be modified as well as the various modifications.

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2.1 Anchor-Darline Group AD-1 Valves Descriotion This group is composed of eight,2-1/2 inch,1500 lb, Anchor-Darling gate valves.

These valves are normally open and have a safety function to close to isolate the Auxiliary Component Cooling Water (ACCW) to the thermal barriers in the event of a thermal barrier tube rupture. The thrust requirements for these valves were calculated with the EPRI Performance Prediction Methodology utilizing the default friction coefficients.

Table 2-2 Anchor-Darling Group AD-1 Valves Valve Tag Valve Descriotion Design Design Safety ML E

2 Position Open Close Onen/Close 1HV-19051 Thermal Barrier Isolation Valve 143 2364 Close p

2HV-19051 Thermal Barrier Isolation Valve 143 2364 Close

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1HV-19053 Thermal Barrier Isolation Valve 143 2364 Close 2HV-19053 Thermal Barrier Isolation Valve 143 2364 Close 1HV-19055 Thermal BarrierIsolation Valve 143 2364 Close 2HV-19055 Thermal Barrier Isolation Valve 143 2364 Close IHV-19057 Thermal Barrier Isolation Valve 143 2364 Close 2HV-19057 Thermal Barrier Isolation Valve 143 2364 Close Differential Pressure Test Status These valves have a differential pressure test priority of 2 in the opening direction and 5 in the closing direction. Based on the priority 5 ranking the valves require differential pressure testing in the VEGP program. However, the valves were not differential pressure tested because the design-basis differential pressure is based on a thermal barrier tube rupture which can not be simulated for test purpcses.

The normal ACCW system pressure is less than 10% of the design-basis differential pressure for these valves, therefore, performing differential pressure tests on these valves would not have provided meaningful results.

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Calculated Marcins i

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The opening margins were determined based on a design-basis differential j

pressure of 143 psid which is associated with recovering from mispositioning.

These valves do not have an active safety function to open.

i Fieure 2-1 Onenino Canability Marmn l

j 2HV-19057 717 f

IHV-19057 717 l

211V-19055 71 I f

IHV-19055 717 j

2HV-19053 711 IIIV-19053 717 211V-19051 717

{

IHV-19051 717 0

100 200 300 400 500 600 700 800 i

l Margin %

iO The closing margins were determined based on a design-basis difTerential pressure of 2364 psid which is associated with the safety function ofisolating the ACCW j

system in the event of a thermal barrier tube rupture.

Figure 2-2 Closine Capability & Sctun Marcins 2HV-19057 44 tilV-19057 44 2n y.g9055 44 111 % I9055 44 211 % I9053 44 IHV-19053 44 2HV-19051 3 44 111%I9051 E44 0

20 40 60 80 100 Margin %

O ECapability Margin 5 Setup Margin 2-4

Design-Basis Canability Justification

1. Valves 1/2HV-5106 are 4",900 lb Anchor-Darling (Group AD-4) valves similar in design to the valves in group AD-1. These valves were differential pressure tested in-situ at VEGP on steam under blowdown conditions and performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology. The actual opening thrusts were 54% and 52%

of the predicted values respectively and the actual closing thrusts were 51% and 64% of the predicted values respectively.

2. EPRI Valve Number 3 is a 6",900 lb Anchor-Darling valve similar in design to the valves in group AD-1. This valve was tested in a flow loop with 500* F water under blowdown conditions and performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology.

3. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of 717% and a closing setup margin of 44%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

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O 2.2 Anchor-Darline Group AD-2 Valves Description This group is composed of two,3-0 inch,1500 lb, Anchor-Darling gate valves, j

These valves are normally open and have a safety function to close to isolate the Auxiliary Component Cooling Water (ACCW) to the thermal barriers in the event of a thermal barrier tube rupture. The thrust requirements for these valves were calculated with the EPRI Performance Prediction Methodology utilizing the default friction coefficients.

Table 2-3 Anchor-Darling Group AD-2 Valves Valve Tag Valve Description Design Design Safety No.

DP DP Position Open Close Open/Close 1HV-2041 Thermal Barrier Isolation Valve 144 2235 Close w

2HV-2041 Thermal Barrier isolation Valve 144 2235 Close Differential Pressure Test Srntum These valves have a differential pressure test priority of 2 in the opening direction and 6 in the closing direction. Based on the priority 6 ranking the valves require differential pressure testing in the VEGP program. However, the valves were not differential pressure tested because the design-basis differential pressure is based on a thermal barrier tube rupture which can not be simulated for test purposes.

The normal ACCW system pressure is less than 10% of the design-basis differential pressure for these valves, therefore, performing differential pressure tests on these valves would not have provided meaningful results.

Calculated Margins The opening margins were determined based on a design-basis differential pressure of 144 psid which is associated with recovering from mispositioning.

These valves do not have an active safety function to open.

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's Figure 2-3

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Onenine Canability Marvins 2HV-2041 IHV-2041 0

100 200 300 400 500 600 Margin %

The closing margins were determined based on a design-basis differential pressure of 2235 psid which is associated with the safety function ofisolating the ACCW system in the event of a thermal barrier tube rupture. These valves are controlled by a.imit switch in the closing direction, therefore, the closmg capability margin and setup margin are equivalent for these valves.

Figure 2-4 Closine Capability Marvinn 21{V-1041 -49 tilV-2041

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20 40 60 80 100 Margin %

f Design-Basis Canability Justification

1. Valves 1/2HV-5106 are 4",900 lb Anchor-Darling (Group AD-4) valves similar in design to the valves in group AD-2. These valves were differential pressure tested in-situ at VEGP on steam under blowdown conditions and performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology. The actual opening thrusts were 54% and 52%

of the predicted values respectively and the actual closing thrusts were 51% and 64% of the predicted values respectively.

2. EPRI Valve Number 3 is a 6",900 lb Anchor-Darling valve similar in design to the valves in group AD-2. This valve was tested in a flow loop with 500* F water under blowdown conditions and performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology.

3. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of 584% and a closing margin of 49%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

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2.3 Anchor-Darline Group AD-3 Valves Descriotion This group is composed of four,4-0 inch,150 lb, Anchor-Darling gate valves.

These valves are normally closed and have a safety function to open to supply service air to containment for post LOCA purge. The thrust requirements for these valves were calculated with the Industry Standard Equation utilizing a 0.5 valve factor.

Table 2-4 Anchor-Darling Group AD-3 Valves Valve Tag Valve Descriotion Design Design Safely ML M

DE Position Open Close Onen/Close 1HV-9380A Cnmt. Atmosphere Service Air 132 0

Open 2HV-9380A Cnmt. Atmosphere Service Air 132 0

Open g

lHV-9380B Cnmt. Atmosphere Service Air 132 0

Open 2HV-9380B Cnmt. Atmosphere Service Air 132 0

Open Differential Pressure Test Status These valves have a differential pressure test priority of 4 in the opening direction and 4 in the closing direction. The VEGP program only requires that Anchor-Darling valves with differential pressure test priorities of 5 or higher be differential pressure tested, therefore, these valves were not tested.

Calculated Margins The opening margins were determined based a design-basis differential pressure of 132 psid which is associated with the valves safety function of opening to provide service air for post LOCA purge.

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O Figure 2-5 Openine Capability Marcins 211V-9380B 32 IHV-9380B 17 1

2HV-9380A l'

1HV-9380A I

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Margin %

i The closing margins were determined based on a design-basis differential pressure of 0 psid which is associated with closing the valves under normal conditions with two normally closed containment isolation valves located upstream of these valves. These valves do not have an active safety function to close.

i Figure 2-6 4

Closine Capability & Setup Marains 2HV-9380B 2

l 1HV-9380B 2

2HV-9380A E2 1HV-9380A 206 O

50 100 150 200 250 300 4

Margin %

ECapability Margin 5 Setup Margin Design-Basis Canability Justification

1. These valves are located in a service air system and operate against relatively low differential pressures. The industry standard equation utilizing a 0.5 valve factor will conservatively predict thrust requirements for valves operating in relatively mild applications.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of 32% and a closing setup margin of 124%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

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2.4 Anchor-Darline Group AD-4 Valves This group is composed of six,4-0 inch,900 lb, Anchor-Darling gate valves.

Valves 1/2HV-3009 and 1/2HV-3019 are normally open and have a safety function to close to isolate a downstream line break in the steam supply piping to the auxiliary feedwater (AFW) pump turbine. Valves 1/2HV-5106 are normally closed and have a safety function to open to admit steam to the AFW pump turbine. The thrust requirements for these valves were calculated with the EPRI Performance Prediction Program utilizing the default friction coefficients.

Table 2-5 Anchor-Darling Group AD-4 Valves Valve Tag Valve Descrintion Design Design Safely 2

2 Position Open Close Onen/Close 1HV-3009 Steam to AFW Pump Turbine 1185 1185 Open/Close 2HV-3009 Steam to AFW Pump Turbine 1185 1185 Open/Close 1HV-3019 Steam to AFW Pump Turbine 1185 1185 Open/Close p

2HV-3019 Steam to AFW Pump Turbine 1185 1185 Open/Close 1HV-5106 Steam to AFW Pump Turbine 1185 0

Open 2HV-5106 Steam to AFW Pump Turbine 1185 0

Open Differential Pressure Test Status These valves have a differential pressure test priority of 5 in the opening direction and 6 in the closing direction. Based on the priority 5 and 6 rankings these valves require testing in the VEGP program. Valves 1HV-3009 and 1/2HV-5106 have been differential pressure tested. In performing the differential pressure test on valve 1HV-3009 it was determined that this valve could not be tested at a significant differential pressure. There is a large volume of piping between valve 1HV-3009 and the AFW pump turbine, and due to the piping downstream of the valve, in combination with the flow restriction provided by the AFW turbine governor valve, the steam pressure downstream of valve 1HV-3009 decays very slowly after flow isolation. Due to the magnitude of the downstream pressure transient following flow isolation, the actual differential pressure at flow isolation is relatively low and difficult to determine with any degree of certainty. Valves 1HV-3019 and 1/2HV-3019 are utilized in identical applications to valve 1 HV-3009, therefore, these valves were not differential pressure tested due to the low differential pressure attainable under the test conditions.

Calculated Margins 2-10

O The opening margins for valves 1/2HV-3009 and 1/2HV-3019 were determined based on a design-basis differential pressure of 1185 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margins for valves 1/2HV-5106 were determined based on a design-basis differential pressure of 1185 psid which is associated with the safety function of opening to provide steam to the AFW pump turbine.

Fleure 2-7 Openine Capability Marvin 2flV-5106 -23 IHV-5106 -71 211V-3019 U

IHV-3019 27 211V-3009 30 llIV-3009 26 0

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Margin %

The closing margins for valves 1/2HV-3009 and 1/2HV-3019 were determined based a design-basis differential pressure of 1185 psid which is associated the safety function of closing to isolate a downstream break in the steam supply piping to the AFW pump turbine. These valves are controlled by a limit switch in the closing direction, therefore, the closing capability margin and setup margin are equivalent for these valves.

The closing margins for valves 1/2HV-5106 were determined based on a design-basis differential pressure of 0 psid which is associated with closing the valve under normal conditions with the AFW pump turbine trip-throttle valve closed.

These valves do not have an active safety function to close.

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O Figure 2-8 Closinn Capability & Setup Marains 2iiV-5106' u7 tilV-5106 uv 211V-3019.3 36 IIIV-3019 m28 211V-3009 g 30 IIIV-3009 26 0

50 100 150 200 250 300 350 400 Margin %

5 Capability Margin ESetup Margin Design-Basis Caoability Justification

1. Valves 1/2HV-5106 were differential pressure tested in-situ at VEGP on steam under blowdown conditions and performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology. The actual O

opening thrusts were 54% and 52% of the predicted values respectively and the d

actual closing thrusts were 51% and 64% of the predicted values respectively.

2. EPRI Valve Number 3 is a 6",900 lb Anchor-Darling valve similar in design to the valves in group AD-4. This valve was tested in a flow loop with 500* F water under blowdown conditions and performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology.

3. Based on conservative calculations of valve thrust requirements and operator capabilities valves 1/2HV-3009 and 1/2HV-3019 have an opening margin of at least 26% and closing margin of at least 26%. Valves 1/2HV-5106 have an opening margin of 23 % and a closing setup margin of 205%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

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3.0 WESTINGHOUSE GATE VALVES There are a total of 108 Westinghouse gate valves included in the VEGP GL 89-10 program. The valves are of the flex-wedge design and utilize stainless steel discs and valve bodies. The disc guide slot and the disc face and body seats are hardfaced with Stellite. These valves have been divided into 14 groups of identical valves as outlined in Table 3-1. Groups W-2A and W-2B appear to be identical based on the criteria identified in the table, however, there are internal differences in the valves construction, therefore, the valves were placed in separate groups.

Table 3-1 Valve Groups Group Manufacturer Valve Valve ANSI IQial

_ML Iy.pc Jize Rating Valves W-1 Westinghouse Gate 3.0 Inch 150 lb 2

W-2A Westinghouse Gate 3.0 Inch 2035 lb 8

W-2B Westinghouse Gate 3.0 Inch 2035 lb 8

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W-3 Westinghouse Gate 4.0 Inch 150 lb 4

V W-4 Westinghouse Gate 4.0 Inch 900 lb 4

W-5 Westinghouse Gate 4.0 Inch 1525 lb 16 W-6 Westinghouse Gate 6.0 Inch 150 lb 14 W-7 Westinghouse Gate 8.0 Inch 150 lb 6

W-8 Westinghouse Gate 8.0 Inch 316 lb 12 W-9 Westinghouse Gate 8.0 Inch 1525 lb 4

W-10 Westinghouse Gate 10.0 Inch 150 lb 12 W-11 Westinghouse Gate 12.0 Inch 316 lb 4

W-12 Westinghouse Gate 12.0 Inch 1525 lb 10 W-13 Westinghouse Gate 14.0 Inch 316 lb 4

The thrust requirements for these valves were calculated with the EPRI NMAC equation utilizing a 0.55 friction coefficient for valves in steam service and a 0.60 friction coefficient for valves in water service. The EPRI Performance Prediction Program (PPP) methodology was not available when these calculations were performed. The EPRI NMAC methodology is discussed in more detail in Section 3.3.1.2 of the Program Summary Report.

The Westinghouse valves are equipped with valve stems utilizing standard ACME O

threads and a stem friction coefficient of 0.15 was utilized in calculating the stem b

factors for these valves. The basis for utilizing a 0.15 stem friction coefficient for these valves is outlined in Section 9.6 of the Program Summary Report.

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O The opening and closing capability margins were calculated for each of the valves in these groups. In addition, for valves which are controlled in the closing direction by a torque switch, the closing setup margin is also included. The setup margin takes into account test equipment accuracy, torque switch repeatability and Load Sensitive Behavior and for the purposes of this document values of 10%,5% and 20% respectively were utilized to account for these uncertainties. In j

practice, the values utilized for test equipment accuracy and torque switch repeatability would be determined based on each specific valve setup. Section 4.0 of the Program Summary Report discusses the various margins in detail and outlines the basis for determining the adjustments necessary to account for test i

equipment accuracy, torque switch repeatability and Load Sensitive Behavior.

In reviewing the various margins contained in this document it should be noted that the margins are based on the MOV's as-modified configuration. A total of 28 1

Westinghouse valves are scheduled to be modified in the 1996 refueling outages and the margins outlined in this document reflect those modifications. Section 6.2 of the Program Summary Report identifies the valves to be modified as well as the various modifications.

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3.1 Westinghouse Group W 1 Vahrg Descriotion This group is composed of two,3 inch,150 lb, Westinghouse gate valves. These valves are normally closed and have a safety function to open on a containment high pressure signal to provide sodium hydroxide to the containment spray system. The valves have a safety function to close following depletion of the sodium hydroxide. The thrust requirements for these valves were calculated with the EPRI NMAC equation utilizing a 0.6 coefficient of friction. It should be J

noted that the Unit 2 valves have been abandoned in place and the Unit I valves will abandoned in place following the 1996 refueling outage.

Table 3-1 Westinghouse Group W-1 Valves Valve Tag Valve Descriotion Design Design Safety No, M

M Position Open Close Onen/Close j

IHV-8994A Spray Additive Tank Outlet 17 17 Open/Close p

V 1HV-8994B Spray Additive Tank Outlet 17 17 Open/Close j

Differential Pressure Test Status These valves have a differential pressure test priority of 4 in the opening direction and 3 in the closing direction. Based on the priority 4 ranking the valves require differential pressure testing in the VEGP program. However, the valves were not differential pressure tested because stroking the valves under a differential pressure would have allowed sodium hydroxide to enter the containment spray system. The discharge of the containment spray system is aligned to the RWST during surveillance testing and this contaminated water would have ultimately been pumped to the RWST.

Calculated Margins The opening margins were determined based on a design-basis differential pressure of 17 psid which is associated with the safety function of opening to admit sodium hydroxide to the containment spray system.

Ob 3-3

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Openine Capability Margin tilV-8994H tilV-8994A 0

20 40 60 80 100 l

Margin %

The closing margins for these valves were calculated based on a design-basis differential pressure of 17 psid which is associated with the safety function of closing following depletion of the sodium hydroxide tank.

t Closine Capability & Setup Margins IHV-8994B

'm 92 j

llIV-8994A

- 92 0

50 100 150 200 j

Margin %

5 Capability Margin aSetup Margin Design-Basis Canability Justification I

1. The design-basis differential pressure of 17 psid which these valves are l

required to operate against is extremely low and results in loads which are I

comparable to those encountered in a static test. In addition, these valves will be I

abandoned in place following the Unit I refueling outage in 1996.

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2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of 59% and a closing setup i

margin of 41%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

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V 3.2 Westinehouse Group W-2A Valves Description This group is composed of eight,3 in,2035 lb, Westinghouse gate valves. Valves 1/2LV-0610 and 1/2LV-0611 are normally open to provide RHR pump miniflow.

The valves have a safety function to close when RHR flow increases above a setpoint and to re-open when RHR flow decreases below a setpoint. Valves 1/2HV-8146 and 1/2HV-8147 are the normal and attemate charging path to the RCS. The function of these valves is attemated over the life of the plant with the normal charging valve open and the alternate charging valve closed. These valves are aligned during cold shutdown. In addition, the valves have a safety function to open to provide an emergency boration flowpath. The thrust requirements for these valves were calculated with the EPRI NMAC equation utilizing a 0.6 coefficient of friction.

Table 3-2 Westinghouse Group W-2A Valves Valve Tag Valve Descrintion Design Resign Safety h

DE DE Position Open Gase Onen/Close IFV-0610 RHR Pump MiniflowIsolation 202 202 Open/Close 2FV-0610 RHR Pump Miniflow Isolation 202 202 Open/Close i

IFV-0611 RHR Pump Minillow Isolation 202 202 Open/Close 2FV-0611 RHR Pump Miniflow Isolation 202 202 Open/Close IHV-8146 Normal Charging to RCS 490 0

Open 2HV-8146 Normal Charging to RCS 490 0

Open lHV-8147 Altemate Charging to RCS 490 0

Open 2HV-8147 Altemate Charging to RCS 490 0

Open Differentin1 Pressure Test Statm All of the valves in this group have a differential pressure test priority of 4 in either the open or close direction. Based on the priority 4 ranking these valves require testing in the VEGP program and differential pressure tests on these valves have been completed.

O 3-5

Calculated Margins The opening margins for valves 1/2FV-0610 and 1/2FV-0611 were determined based on a design-basis differential pressure of 202 psid which is associated with the safety function of opening to provide RHR pump miniflow.

The opening margins for valves 1/2HV-8146 and 1/2HV-8147 were determined based on a design-basis differential pressure of 490 psid which is associated with recovering from mispositioning. These valves have a safety function to open to provide an emergency boration flow path with a differential pressure of 96 psid.

Opening Capability Margin 2HV-8147 t'i IHV-8147 297 2ilV-8146 1IIV-8146 Tat 2FV-0611 147 IFV-06II ON 2FV-0610 147 IFV-0610 141 0

50 100 150 200 250 300 350 400 Margin %

The closing margins for valves 1/2FV-0610 and 1/2FV-061I were determined based on a design-basis differential pressure of 202 psid which is associated with the safety function of closing to isolate RHR miniflow on increasing RHR pump flow.

The closing margins for valves 1/2HV-8146 and 1/2HV-8147 were determined based on a design-basis differential pressure of 0 psid which is associated with aligning the valves during cold shutdown. These valves do not have an active safety function to close.

O 3-6

O Closine Capability & Setup Marcins 211V-8147 I'l 1IIV-8147 l'l 211V-8146 191 1IIV-8146 l'I 2FV-0611 112 IFV-0611 112 2FV-0610 112 IFV-0610 112 0

50 100 150 200 250 300 Margin %

5 Capability Margin 5 Setup Margin Design-Basis Canability Justification

1. All of the valves in this group were differential pressure tested in-situ at VEGP and operated successfully. The apparent friction coeflicients for these tests ranged from 0.81 to 1.49 in the opening direction and from 0.50 to 0.72 in the closing direction. The apparent friction coefficients are in many cases higher than the design value of 0.6, however, the test result are not considered to be credible due to the low dynamic loads associated with these tests. Section 9.2.1 of the Program Summary Report contains a detailed discussion of the differential pressure test results for this group of valves.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 297% and a closing setup margin of at least 55%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 3-7

AU 3.3 Westinghouse Group W-2B Valves Descriotion This group is composed of eight,3 inch,2035 lb, Westinghouse gate valves.

Valves 1/2HV-8000A/B are normally open and have a safety function to close to j

isolate a leaking or stuck open Pressure Operated Relief Valve (PORV). In the event that the valves are closed to isolate a leaking PORV, the valves are required to open to mitigate a steam generator tube rupture. Valves 1/2HV-8105 and 1/2HV-8106 are nonnally open to provide charging flow to the regenerative heat exchanger and have a safety function to close on an SI signal to isolate normal charging to the RCS. The thrust requirements for valves 1/2HV-8000A/B were calculated with the EPRI NMAC equation utilizing a 0.55 coefficient of friction.

The thrust requirements for valves 1/2HV-8105 and 1/2HV-8106 were calculated with the EPRI NMAC equation utilizing a 0.6 coefficient of friction.

Table 3-3 Westinghouse Group W-2B Valves Valve Tag Valve Descriotion Design Design Safety ML T

DE Position s

l Open Close Onen/Close s

IHV-8000A PORV Block Valve 2485 2485 Open/Close 2HV-8000A PORV Block Valve 2485 2485 Open/Close IHV-8000B PORV Block Valve 2485 2485 Open/Close 2HV-80008 PORV Block Valve 2485 2485 Open/Close 1HV-8105 Charging Pump to RCS Isolation 460 2681 Close 2HV-8105 Charging Pump to RCS Isolation 460 2681 Close IHV-8106 Charging Pump to RCS Isolation 460 2681 Close 2HV-8106 Charging Pump to RCS Isolation 460 2681 Close Differential Pressure Test Status Valves 1/2HV-8000A/B have a differential pressure test priority of 5 in the opening direction and 6 in the closing direction. Valves 1/2HV-8105 and 1/2HV-8106 have a differential pressure test priority of 3 in the opening direction and 6 in the closing direction. Based on the 6 priority rankings these valves require testing in the VEGP program. Valves 1/2HV-8105 and 1/2HV-8106 have been tested. However, valves 1/2HV-8000A/B were not tested because performing a p

differential pressure test on these valves would have required opening the V

PORV's at rated temperature and pressure which would have essentially simulated a LOCA. This action would have placed the plant in a potentially 3-8

l l

i O

V unsafe condition, therefore, these valves were determined not to be testable under l

i differential pressure conditions.

Glculated Margins The opening margins for valves 1/2HV-8000A/B were determined based on a design-basis differential pressure of 2485 psid which is associated with opening to mitigate a steam generator tube rupture, i

The opening margins for valves 1/2HV-8105 and 1/2HV-8106 were determined based on a design-basis differential pressure of 460 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

I Openine Capability Marcin 211V-8106 779 l

lilV-8106 H4 211V-8105 tilV-8105 790 x

211V-8000H 133 l

lilV-8000B 132 a

2ilV-8000A 126 I

tilV-8000A 118 l

0 200 400 600 800 1000 Margin %

4 The closing margins for valves 1/2HV-8000A/B were determined based on a design-basis differential pressure of 2485 psid which is associated with the safety function of closing to isolate a leaking or stuck open PORV.

The closing margins for valves 1/2HV-8105 and 1/2HV-8106 were determined 4

based on a design-basis differential pressure of 2681 psid which is associated with the safety function of closing on an SI signal to isolate normal charging to the j

RCS.

All of the valves in this group are controlled by a limit switch in the closing direction, therefore, the closing capability margin and setup margin are equivalent for these valves.

O 1

3-9

1 Closine Canability Marcin 2flV-8106 30 iflV-8106 29 211V-8105 m33 tilV-8105 30 211V-80008 56 tilV-8000B -55 211V-8000A 51 tilV-8000A 46 0

20 40 60 80 100 Margin %

Design-Basis Canability Justification

1. Valves 1/2HV-8105 and 1/2HV-8106 were differential pressure tested in-situ at VEGP and operated successfully. The apparent friction coefficients for these g

tests ranged from 0.32 to 0.66 in the opening direction and from 0.16 to 0.50 in Q

the closing direction. The apparent opening friction coefficient for valve 1HV-8106 exceeded the design value of 0.6, however, the difference is within the overall accuracy of the test process. In addition, the opening test was performed at a differential pressure of 2441 psid and the design-basis differential pressure for this valve is 460 psid which is based on mispositioning. The valve does not have an active safety function to open.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least i18% and a closing margin of at least 29%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 3-10

m 3.4 Westinnhouse Group W-3 Valves Descriotion This group is composed of four,4 inch,150 lb, Westinghouse gate valves. These valves are normally open to provide Volume Control Tank (VCT) suction to the Caps and have a safety function to close on an SI signal to isolate VCT suction to the Caps. The thrust requirements for these valves were calculated with the EPRI NMAC equation utilizing a 0.6 coefficient of friction.

Table 3-4 l

Westinghouse Group W-3 Valves Valve Tag Valve Descriotion Design Design Safety M

E Position Open Close Ooen/Close i

ILV-0112B VCT Outlet Isolation 78 42 Close 2LV-0112B VCT Outlet Isolation 78 42 Close

,q lLV-0112C VCT Outlet Isolation 78 42 Close U

2LV-0112C VCT Outlet Isolation 78 42 Close Differential Pressure Test Status These valves have a differential pressure test priority of 2 in the opening direction and 3 in the closing direction. The VEGP program only requires that Westinghouse valves with a differential pressure test priority of 4 or higher be differential pressure tested, therefore, these valves were not tested. In addition, these valves are located in the suction piping to the charging pumps and testing the valves under flow conditions could have damaged the pumps due to low suction head.

i l

Calculated Margins The opening margins were determined based on a design-basis differential pressure of 78 psid which is associated with recovering from mispositioning.

These valves do not have an active safety function to open.

Ov i

3-11 l

O Openine Canability Marcin 2LV-0112C

s 199 ILV-Oll2C 2LV-Oll2B I LV01 /'

0 50 100 150 200 Margin %

The closing margins were determined based on a design-basis differential pressure of 42 psid which is associated with the safety function of closing on an SI signal to isolate VCT suction to the CCPs.

Closine Canability & Setup Marcins 6

0 50 100 150 200 Margin %

5 Capability Margin aSetup Margin Design-Basis Canability Justification

1. The design-basis ditTerential pressures of 78 psid in the opening direction and 42 psid in the closing direction are extremely low and result in loads which are comparable to those encountered in a static test.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of 199% and a closing setup margin of 92%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 3-12

O v

3.5 Westinghouse Group W-4 Valves Description This group is composed of four,4 inch,900 lb, Westinghouse gate valves. These valves are normally open to provide to provide an SI flow path to the RCS during injection and cold-leg recirculation. The valves have a safety function to close to isolate flow to the cold-legs when transferring to hot-leg recirculation. The thrust requirements for these valves were calculated with the EPRI NMAC equation utilizing a 0.6 coefficient of friction.

Table 3-5 Westinghouse Group W-4 Valves Valve Tag Valve Descrintion Design Design Safety Nsh E

E Position Open Close Ooen/Close IHV-8821 A S1 Pump to RCS Cold Leg isol.

1750 1750 Open/Close IHV-8821 A S1 Pump to RCS Cold Leg isol.

1750 1750 Open/Close p

1HV-8821 A S1 Pump to RCS Cold Leg isol.

1750 1750 Open/Close 1HV-8821 A SI Pump to RCS Cold Leg isol.

1750 1750 Open/Close Differential Pressure Test Status These valves have a differential pressure test priority of 5 in the opening direction and 6 in the ciosing direction. Based on the priority 6 ranking these valves require testing in the VEGP program and differential pressure tests on these valves have been completed.

Calculated Margin The opening margins were determined based on a design-basis differential pressure of 1750 psid which is associated with recovering from mispositioning.

These valves do not have an active safety function to open.

b) v 1

3-13

i Opening Canability Marvin 2HV-8821B 121 l

l IHV-8821 B 119 2HV-8821A lit iHV-8821 A Ii1 0

50 100 150 200 Margin %

The closing margins were determined based on a design-basis differential pressure of 1750 psid which is associated with closing to isolate a passive failure leak 50 gpm or less during recirculation. These valves are controlled by a limit switch in the closing direction, therefore, the closing capability margin and setup margin are equivalent for these valves.

Closino Capability Marvinn 2HV-8821B 37 IHV-8821B 37 2HV-8821 A 1"

lHV-8821 A 1"

0 10 20 30 40 50 Margli %

Design-Basis Canability Justification

1. All of the valves in this group were differential pressure tested in-situ at VEGP and operated successfully. The apparent friction coefficients for these tests ranged from 0.12 to 0.26 in the opening direction and from 0.10 to 0.32 in the closing direction. The apparent friction coefficients for all of the tests are bounded by the design value of 0.6.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least i11% and a closing margin of 37%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 3-14

(O/

3.6 Westinehouse Groun W-5 Valves

)

i Descriotion l

This group is composed of sixteen,4 inch,1525 lb, Westinghouse gate valves.

These valves are utilized in a variety of applications in the Safety Injection (SI) system and the Chemical and Volume Control System (CVCS)..The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 coefficient of friction.

Table 3-6 Westinghouse Group W-5 Valves Valve Tag Valve Descriotion Design Design Safety M

M Position Open Close Onen/Close IHV-8438 CCP Crosstie Isolation 0

227 Open/Close 2HV-8438 CCP Crosstie Isolation 0

227 Open/Close l

IHV-8485A CCP Discharge Isolation 227 0

Open/Close 2HV-8485A CCP Discharge Isolation 227 0

Open/Close lHV-84858 CCP Discharge Isolation 227 0

Open/Close 2HV-8485B CCP Discharge Isolation 227 0

Open/Close IHV-8801 A BIT Discharge Isolation 2674 483 Open/Close 2HV-8801A BIT Discharge Isolation 2674 483 Open/Close IHV-8801B BIT Discharge Isolation 2674 483 Open/Close 2HV-8801B BIT Discharge Isolation 2674 483 Open/Close 1HV-8802A SIP to RCS Hot Leg Isolation 1735 0

Open/Close 2HV-8802A SIP to RCS Hot Leg Isolation 1735 0

Open/Close IHV-8802B SIP to RCS Hot Leg Isolation 1735 0

Open/Close 2HV-8802B SIP to RCS Hot Leg Isolation 1735 0

Open/Close IHV-8835 SIP to RCS Cold Leg Isolation 1728 0

Open/Close 2HV-8835 SIP to RCS Cold Leg Isolation 1728 0

Open/Close Valves 1/2HV-8438 are normally open to crosstie the discharge of CCPs A and B.

The valves have a safety function to close to isolate a passive failure leak ofless than 50 gpm during recirculation.

Valves 1/2HV-8485A/B are normally open to provide a CCP discharge flow path.

The valves have a safety function to close in establishing safety grade cold shutdown and to isolate a passive failure leak ofless than 50 gpm during 3

recirculation.

d 3-15

Valves 1/2HV-8801 A/B are normally closed and have a safety function to open on an SI signal to provide a flow path from the CCPs to the RCS cold legs. The valves also have a safety function to open to provide an emergency boration flow path if the normal charging path is not available.

Valves 1/2HV-8802A/B are normally closed and have a safety function to open to provide a SI flow path to the hot legs when transferring to hot-leg recirculation.

j Valves 1/2HV-8835 are normally open to provide an SI flow path to the RCS cold-legs. The valves have a safety function to close when transferring to hot-leg recirculation.

Differential Pressure Test Status All of the valves in this group with the exception of 1/2HV-8438 and 1/2HV-8485A/B have a differential pressure test priority of 6. All of the valves with differential pressure test priorities of 6 have been tested.

Calculated Margin The opening margin for valves 1/2HV-8438 were determined based on a design-Q basis differential pressure of 0 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margin for valves 1/2HV-8485A/B were determined based on a design-basis difTerential pressure of 227 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

i The opening margins for valves 1/2HV-8801 A/B were determined based on a design-basis differential pressure of 2674 psid which is associated with opening on an SI signal to provide a flow path from the CCPs to the RCS cold-legs.

The opening margins for valves 1/2HV-8802A/B were determined based on a design-basis differential pressure of 1735 psid which is associated with recovering from mispositioning. The valves have a safety function to open when transferring to hot-leg recirculation with a differential pressure of 189 psid.

The opening margins for valves 1/2HV-8835 were determined based on a design-basis differential pressure of 1728 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

O 3-16

O Openine Canability Marcin 2iiV-883S l4 tilV-8835 l4 2ilV-8802B EIS i

llIV-8802B EIS 2ilV-8802A 3

tilV-8802A 13 hl7 211V-8801B tilV-8801 B 3 25 211V-8801 A h21 IIIV 8801.t h21 211V-8485B 324 tilV-8485B 324 211V-8485A 329 tilV-8485A 329 211V-8438 565 tilV-8438 l

l l

l l

l 0

100 200 300 400 500 600 Margin %

The closing margins for valves 1/2HV-8438 were determined based on a design-basis differential pressure of 227 psid which is associated with isolating a passive failure leak of 50 gpm or less during recirculation.

The closing margins for valves 1/2HV-8485A/B were determined based on a design-basis differential pressure of 0 psid which is associated with closing to establish safety grade cold shutdown. Valve 2HV-8485B is controlled by a limit switch in the closing direction, therefore, the closing capability margin and setup margin are equivalent for this valve.

The closing margins for valves 1/2HV-8801 A/B were determined based on a design basis differential pressure of 483 psid which is associated with recovering from mispositioning. The valves are required to close to isolate a passive failure leak of 50 gpm or less during recirculation with a differential pressure of 270 psid.

3-17

These valves are controlled by a limit switch in the closing direction, therefore, the closing capability margin and setup margin are equivalent for these valves.

The closing margins for valves 1/2HV-8802A/B were determined based on a design-basis differential pressure of 0 psid which is associated with aligning the valves to their normal position during start-up. These valves do not have an active safety function to close.

The closing margins for valves 1/2HV-8835 were determined based on a design-basis differential pressure of 0 psid which is associated with closing to align the SI system for hot-leg recirculation.

Closine Capability & Setup Marcins 120 2ilV-8835 200 120 tilV-8835 200 453 211V-8802B 3

tilV-8802B 35 O

21{V-8802A su 35 ll{V-8802 A Au 211V 8801B 97 1IIV-8801B 97 211V-8801A 97 IIIV-8801 A 97 211V-8485B 166 6

tilV-8485B i35 56 2ilV-8485A 135 56 tilV-8485A 135 63 21IV-8438 163 tilV-8438 254 I

4 4

5 4

5 B

B 0

100 200 300 400 500 600 700 Margin %

WCapability Margin ESetup Margin O

3-18

i l

l Design-Basis Canability Justificatia

1. Valves 1/2HV-8801 A/B were differential pressure tested in-situ at VEGP at conditions approaching design-basis and operated successfully. The apparent i

friction coefficients for these tests ranged from 0.25 to 0.47 in the opening -

direction and from 0.15 to 0.54 in the closing direction. The apparent friction coefficients for all of the tests are bounded by the design value of 0.6.

2. Valves 1/2HV-8802A/B and 1/2HV-8835 were differential pressure tested in-

[

situ at VEGP at conditions approaching design-basis and operated successfully in the opening direction. The apparent friction coefficients in the opening direction ranged from 0.25 to 0.51. The apparent friction coefficients for all of the tests are

.j bounded by the design value of 0.6. In addition, the opening margins for these valves, which in some cases are as low as 3%, were calculated based on differential pressures associated with mispositioning. The safety function opening differential pressure for the 1/2HV-8802A/B valves is 189 psid as opposed to the mispositioning differential pressure of 1735 psid and the safety function differential pressure for the 1/2HV-8835 valves is 0 psid as opposed to a mispositioning differential pressure of 1728 psid. Utilizing the safety function differential pressures results in calculated opening margins of at least 294% for these valves. The design-basis differential pressure for these valves in the closing direction is 0 psid, however, these valves were tested in the closing direction a differential pressures of at least 1392 psid to obtain generic test data on Westinghouse valves. Due to the higher than design test differential pressures, the torque switches on some of the valves operated prior to the valve reaching flow

]

cutoff. This is not a concern for these valves, since the test differential pressure.

l was much higher than the design-basis differential pressure, and the data for these i

valves was not evaluated further. Section 9.2.4 of the Program Summary Report contains a detailed discussion of the differential pressure test results for this group of valves.

. 3. Based on conservative calculations of valve thrust requirements and operator capabilities valves 1/2HV-8485A/B and 1/2HV-8438 have an opening margin of at least 324% and a closing margin of at least 56%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

l l

O 3-19

~

3.7 Westinehouse Groun W-6 Valves Description This group is composed of fourteen,6 inch,150 lb, Westinghouse gate valves.

These valves are utilized in a variety of applications in the Safety Injection (SI) system and Chemical and Volume Control System (CVCS). The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 coefficient of friction.

Table 3-7 Westinghouse Group W-6 Valves Yalve Tag Valve Descrintion Dgsgn Design Safs1X ML 2

2 Position Open Close Onen/Close 1HV-8471 A CCP Suction Isolation 220 220 Open/Close 2HV-8471A CCP Suction Isolation 220 220 Open/Close 1HV-8471B CCP Suction Isolation 220 220 Open/Close 2HV-8471B CCP Suction Isolation 220 220 Open/Close 1HV-8807A RHR to SIP Suction 0

220 Open/Close 2HV-8807A RHR to SIP Suction 0

220 Open/Close IHV-8807B RHR to SIP Suction 0

220 Open/Close 2HV-8807B RHR to SIP Suction 0

220 Open/Close IHV-8923A SIP Suction 220 220 Open/Close 2HV-8923A SIP Suction 220 220 Open/Close 1HV-8923B SIP Suction 220 220 Open/Close 2HV-8923B SIP Suction 220 220 Open/Close 1HV-8924 RHR to SIP Suction Isolation 0

220 Open/Close 2HV-8924 RHR to SIP Suction isolation 0

220 Open/Close Valves 1/2HV-8471 A/B are normally open to provide a suction flow path to the CCPs. The valves have a safety function to close to isolate a passive failure leak of 50 gpm or less during recirculation.

Valves 1/2HV-8807A/B are normally closed and have a safety function to open to provide an SI pump suction flow path from the RHR pumps when transferring to cold-leg recirculation. The valves have a safety function to close to isolate a passive failure leak of 50 gpm or less during recirculation.

O 3-20

1 Valves 1/2HV-8923A/B are normally open to provide a suction flowpath to the SI pumps. The valves have a safety function to close to isolate a passive failure leak of 50 gpm or less during recirculation.

Valves 1/2HV-8924 are normally open to provide a flow path between the RHR pump discharge and the SI pump suction. The valves have a safety function to close to isolate a passive failure leak of 50 gpm or less during recirculation.

Differential Pressure Test Statm All of the valves in this group have a differential pressure test priority of 4 and all of the valves with the exception of 1/2HV-8471 A/B have been tested. Since these valves are all located in pump suction piping, to accomplish this testing the j

intemals were removed from a check valve to establish a return flowpath to the i

RWST. However, in the case of valves 1/2HV-8471 A/B this was not possible since these valves are located directly upstream of the CCP's and stroking these valves under flow conditions would have result in a loss of suction head and possible damage to the CCP's.

Calculnied Maroim

/

The opening margin for valves 1/2HV-8471 A/B.were determined based on a design-basis differential pressure of 220 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margin for valves 1/2HV-8807A/B were determined based on a design-basis differential pressure oi0 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margin for valves 1/2HV-8923A/B were determined based on a design-basis differential pressure of 220 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margin for valves 1/2HV-8924 were determined based on a design-basis differential pressure of 0 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

O

. V l

l 3-21 l

l

... _ - - _ _ _ ~.

i i

i Onenine Canability Marvin 2HV-8924 IHV-8924 1

2HV-8923B 277 IHV-8923B 277 2HV-8923A 261 IHV-8923A 261 i

2HV-8807B m S49 i

lHV-8807B 549 4

2HV-8807A 516 t

i IHV-8807A 516 2HV-8471 B 143 l

IHV-8471B 143 2HV-8471A 144 IHV-8471 A 144 l

0 200 400 600 800 1000 1

l Margin %

4 i

The closing margin for valves 1/211V-8471 A/B were determined based on a j

design-basis differential pressure of 220 psid which is associated with closing to 4

isolate a passive failure leak of 50 gpm or less while in recirculation.

l The closing margin for valves 1/211V-8807A/B were determined based on a j

design-basis differential pressure of 220 psid which is associated with closing to isolate a passive failure leak of 50 gpm or less while in recirculation.

The closing margin for valves 1/2IIV-8923A/B were determined based on a design-basis differential pressure of 220 psid which is associated with closing to isolate a passive failure leak of 50 gpm or less while in recirculation.

The closing margin for valves 1/211V-8924 were determined based on a design-basis differential pressure of 220 psid which is associated with closing to isolate a passive failure leak of 50 gpm or less while in recirculation.

O 3-22

i 1

j i O i

Closine Canability & Setun Mareint j

i 76 l

211V-8924 840 76 IIIV-8924 140 76 2ilV-8923B 76 tilV-8923D 140 74j[ m 140 2ilV-8923A tilV-8923A 140 211V-8807B

!fI 140 76 tilV-8807B 840 76 2tiV-8807A 840 76 lilV-8807A 140 211V-8471B 140 1IIV-847IB 140 211V-847I A 140 76 tilV-8471 A l4p 0

50 100 150 200 Margin %

ECapability Margin 5 Setup Margin l

Design-Basis Canability Verification

1. Valves 1/2HV-8807A/B,1/2HV-8923A/B and 1/2HV-8924 were differential pressure tested in-situ at VEGP and operated successfully. The apparent friction coefficients for these tests ranged from 0.29 to 0.56 in the opening direction and from 0.19 to 0.36 in the closing direction. The apparent friction coefficients for all of the tests are bounded by the design value of 0.6.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 143% and a closing setup margin of at least 76%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 3-23

i 3,8 Westinehouse Groun W-7 Valves Description This group is composed of six,8 inch,150 lb, Westinghouse gate valves. Valves 1/2HV-8806 are normally open to provide a suction flowpath from the RWST to d

the SI pumps during injection. These valves have a safety function to close when transferring to cold-leg recirculation. Valves 1/2HV-0112D/E are normally i

closed and have a safety function to open on an SI signal to align the CCP suction

.l to the RWST. The valves have a safety function to close to isolate the CCP l

suction from the RWST when transferring to cold-leg recirculation. The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 valve factor.

4 t

a able 3-8 Westinghouse Group W-7 Valves Valve Tag Valve Description Design Design SaftiX h

DE DE Position Qpan Close Open/Close O

IHV-8806 RWST to SIP Suction 219 0

Open/Close 2HV-88%

RWST to SIP Suction 219 0

Open/Close 1LV-0112D RWST to CCP Suction 71 0

Open/Close 2LV-0112D RWST to CCP Suction 71 0

Open/Close 1LV-0112E RWST to CCP Suction 71 0

Open/Close 2LV-0112E RWST to CCP Suction 71 0

Open/Close Different al Pressure Test Status i

Valves 1/2HV-8806 have a differential pressure test priority of 4 in the opening direction and ? in tne closing direction. Valves 1/2LV-0112D/E have a differential pressure test priority of 2 in the opening direction and 3 in the closing direction.

Based on the priority 4 ranking, valves 1/2HV-8806 require testing in the VEGP program and differential pressure tests on these valves have been completed in conjunction with the group W-6 valves utilizing the RWST return flowpath. The VEGP program only requires that Westinghouse valves with priorities of 4 or higher be differential pressure tested, therefore, the 1/2LV-0112D/E valves were not tested.

3-24 c.

Calculated Margin The opening margin for valves 1/2HV-8806 were determined based on a design-basis differential pressure of 219 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margin for valves 1/2LV-0112D/E were determined based on a design-basis differential pressure of 71 psid which is associated with opening on an SI signal to provide a flow path between the RWST and the suction to the CCPs.

Openinn Capability Marcin 2LV-Oll2E 359 ILV-Oll2E tu 2LV-Oll2D 359 ILV0ll2D m

211V-8806 87 tilV-8806 87 0

50 100 150 200 250 300 350 400 Margin %

The closing margin for valves 1/2HV-8806 were determined based on a design-basis differential pressure of 0 psid which is associated with closing to isolate the suction of the SI pumps from the RWST when transferring to cold-leg recirculation.

The closing margin for valves 1/2LV-0112D/E were determined based on a design-basis differential pressure of 0 psid which is associated with closing to isolate the suction of the CCP pumps from the RWST when transferring to cold-leg recirculation.

3-25

i

!O 1

Closing Capability & Setup MarF ns i

2LV-Oll2E l

1LV-0112E 627 2LV-Oll2D m

l ILV-Oll2D 627 l

2ilV-88%

<q lilV-8806' 645 j

0 100 200 300 400 500 600 700 Margin %

I ECapability Margin ESetup Margin i

i Desien-Basis Canability Justification i

i

1. Valves 1/2HV-8806 were differential pressure tested in-situ and operated j

successfully. The apparent frictioa coefficients for these tests ranged from 0.34 l

to 0.36 in the opening direction and from 0.25 to 0.31 in the closing direction.

l The apparent friction coefficients for all of the tests are bounded by the design value of 0.6.

f

2. Based on conservative calculations of valve thrust requirements and operator

{

capabilities these valves have an opening margin of at least 87% and a closing j

setup margin of at least 432%. These margins are adequate to ensure that these j

valves will be capable of performing their design-basis function.

1 t

O 3-26

\\

3.9 Westinehouse Group W-8 Valves Description This group is composed of twelve,8 inch,316 lb, Westinghouse gate valves.

These valves are utilized in a variety of applications in the Residual Heat Removal (RHR) system and Containment Spray (CS) system. The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 coefficient of friction, j

Table 3-9 Westinghouse Group W-8 Valves Valve Tag Valve Descrintion Dcagn Caugn SafC1X l

h E

2 Position QDcn Close Open/Close IHV-8716A RHR to RCS Hot Leg Isolation 253 273 Open/Close 1

2HV-8716A RHR to RCS Hot Leg isolation 253 273 Open/Close 1HV-8716B RHR to RCS Hot Leg Isolation 253 273 Open/Close 2HV-8716B THR to RCS Hot Leg Isolation 253 273 Open/Close IHV-8804Aj RHR to CCP Suction 425 217 Open/Close i

2HV-8804A RHR fc CCP Suction 425 217 Open/Close 1HV-8804B RHRc.o SI Pump Suction 425 217 Open/Close 2HV-8804B RHR to SI Pump Suction 425 217 Open/Close 1HV-9001 A CS Pump Discharge 255 124 Open/Close 1

2HV-9001A C5' Pump Discharge 255 124 Open/Close i

1HV-9001B CS Pump Discharge 258 124 Open/Close 2HV-9001B CS Pump Discharge 258 124 Open/Close Valves 1/2HV-8716A/B are normally open to crosstie the discharge of the two trains of the RHR system. The valves have a safety function to close when transferring to cold-leg recirculation and to open when transferring to hot-leg recirculation. The valves have a safety function to close to isolate a passive failure leak of 50 gpm or less during recirculation and to close when aligning for safety-grade cold shutdown.

Valves 1HV-8804A/B are normally closed and have a safety function to open to establish a flow path between the discharge of the RHR pumps and the suction of the SI or CCP pumps when transferring to cold-leg recirculation. The valves have a safety function to close to isolate a pasdve failure leak of 50 gpm or less dwing O

recirculation.

3-27

Valves IHV-9001 A/B are normally closed and have a safety function to open on a high containment pressure signal to establish a flow path between the containment spray pumps and the spray header. The valves have a safety function to close to isolate a passive failure leak of 50 gpm or less during recirculation.

Differential Pressure Test Statue All of the valves in this group have a differential pressure test priority of 4 or higher. Based on the priority 4 ranking all of the valves require differential pressure testing in the VEGP program. Valves 1/2HV-8716A/B have been tested and valves 1/2HV-8804A/B were tested in conjunction with the Group W-6 valves utilizing the RWST return flowpath. Valves 1/2HV-9001 A/B were not tested because stroking these valves under flow conditions would have resulted in discharging water inside containment which would have had a detrimental effect on the material condition of the plant.

Calculated Margin The opening margins for valves 1/2HV-8716A/B were determined based on a design-basis differential pressure of 253 psid which is associated with the safety j

function of opening when transferring to hot-leg recirculation.

I The opening margins for valves 1/2HV-8804A/B were determined based on a design-basis differential pressure of 425 psid which is associated with the safety function of opening when transferring to cold-leg recirculation.

The opening margins for valves 1/2HV-9001 A/B were determined based on a j

design-basis differential pressure of 255 or 258 psid which is associated with recovering from mispositioning. The valves have a safety function to open on a j

containment spray signal at a differential pressure of 245 or 248 psid.

O 3-28

Openine Capability Marvin 2HV-90018 24 1HV-9001B 24 2HV-9001A 60 iHV-9001 A 69 211V-8804B 49 IHV-8804B 49 2HV-8804A 53 IHV-8804A 53 j

211V-8716B '

123 IHV-8716B 123 2HV-8716A 140 lHV-8716A 140 0

50 100 150 200 Margin %

O The closing margins for valves 1/2HV-8716A/B were determined based on a design-basis differential pressure of 273 psid which is associated with the safety function of closing when transferring to cold-leg recirculation.

The closing margins for valves 1/2HV-8804A/B were determined based on a design-basis differential pressure of 217 psid which is associated with closing to isolate a passive failure leak of 50 gpm or less.

The closing margins for valves 1/2HV-9001 A/B were determined based on a design-basis differential pressure of 124 psid which is associated with closing to isolate a passive failure leak of 50 gpm or less.

O 3-29

O Closine Capability & Setup Marcins i

2HV-9001B gg lilV-9001B ggg 2HV-9001A 37 1HV-9001 A 07

)

211V-8804B 127 1HV-8804B 127 211V-8804A 75 iHV-8804A 127 2HV-8716B 90 tilV-8716B 90

)

9 211V-8716A 90 9

1IIV-8716A 90l I

i 0

50 100 150 200 Margin %

5 Capability Margin aSetup Margin Design-Basis Canability Justification

1. Valves 1/2HV-8716A/B and 1/2HV-8804A/B were differential pressure tested in-situ at VEGP and operated successfully. The apparent friction coefficients for these tests ranged from 0.30 to 0.84 in the opening direction and from 0.23 to 0.62 in the closing direction. The apparent opening friction coefficient for valve 2HV-8716A and the apparent closing friction coefficient for valves 2HV-8804A/B exceeded the design value of 0.6, however, the differences were within the overall accuracy of the test process. The apparent opening friction coefficient for valve 2HV-8804B appears high, however, a review of the test evaluation identified inconsistencies which may have affected the test results. Section 9.2.7 of the Program Summary Report contains a detailed discussion of the differential pressure test results for this group of valves.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 24% and a closing setup margin of at least 28%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

3-30

r 3.10 Westinghouse Group W-9 Valves Description This group is composed of four,8 inch,1525 lb, Westinghouse gate valves.

These valves are normally open to provide a flow path between the RHR pump discharge and the cold legs. The valves have a safety function to close when transferring to hot-leg recirculation. The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 coefficient of

'I friction.

Table 3-10 Westinghouse Group W-9 Valves Valve Tag Valve Descriotion Design Design Safety 2

T Position DRen Close Onen/Close 1HV-8809A RHR to RCS Cold Leg 199 199 Open/Close 1HV-8809A RHR to RCS Cold Leg 199 199 Open/Close 1HV-8809A RHR to RCS Cold Leg 199 199 Open/Close IHV-8809A RHR to RCS Cold Leg 199 199 Open/Close i

Differential Pressure Test Statig These valves have a differential pressure test priority of 2 in the opening direction and 2 in the closing direction. The VEGP program requires that Westinghouse valves with a priority of 4 or higher be tested, therefore, these valves were not differential pressure tested.

Calenkted Margin The opening margins for these valves were determined based on a design-basis differential pressure of 199 psid which is associated with the normal operation of the RHR system. These valves do not have an active safety function to open.

O 3-31

O Opening Capability Marvin 211V-8809B lilV-8809B 2HV-8809A

'~

lHV-8809A 0

100 200 300 400 500 600 700 800 Margin %

The closing margins for these valves were determined based on a design-basis differential pressure of 199 psid which is associated with closing when transferring to hot leg recirculation.

Closine Capability & Setup Marcins 21{V-8809B 366 L":::"h:::

lilV-8809A 536 0

100 200 300 400 500 600 Margin %

MCapability Margin ESetup Margin Design-Basis Canability Justification

1. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 778% and a closing setup margin of 366%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 3-32

1 3.11 Westinehouse Groun W-10 Valves Desenption This group is composed of twelve,10 inch,150 lb, Westinghouse gate valves.

Valves 1/2HV-9002A/B and 1/2HV-9003A/B are normally closed and have a safety function to open when transferring to recirculation to provide a flow path between the containment sumps and the suction of the containment spray pumps.

The valves have a safety function to close to isolate a passive failure leak ofless than 50 gpm during recirculation. Valves 1/2HV-9017A/B are normally open to provide a flowpath between the RWST and the suction of the containment spray pumps. The valves have a safety function to close when transferring to recirculation. The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 coefficient of friction.

j

)

1 Table 3-11 Westinghouse Group W-10 Valves Valve Tan Valve Descrintion Design Design Salgtg No.

E 2

Position O

~

~

~ " ' " ~

lHV-9002A Containment Spray Sump Suction 101 58 Open/Close 2HV-9002A Containment Spray Sump Suction 101 58 Open/Close 1HV-9002B Containment Spray Sump Suction 101 58 Open/Close 2HV-9002B Containment Spray Sump Suction 101 58 Open/Close 1HV-9003A Containment Spray Sump Suction 101 58 Open/Close 2HV-9003A Containment Spray Sump Suction 101 58 Open/Close 1HV-9003B Containment Spray Sump Suction 101 58 Open/Close 2HV-9003B Containment Spray Sump Suction 101 58 Open/Close IHV-9017A RWST to Contain. Spray Suction 66 23 Open/Close 2HV-9017A RWST to Contain. Spray Suction 66 23 Open/Close iHV-9017B RWST to Contain. Spray Suction 66 23 Open/Close 2HV-9017B RWST to Contain. Spray Suction 66 23 Open/Close Differential Pressure Test Status All of the valves in this group have a differential pressure test priority of 4 with the exception of valves 1/2HV-9017A which have a differential pressure test priority of 3. Based on the priority 4 ranking valves 1/2HV-9002A/B,1/2HV-O 9003 A/B and 1/2HV-9017B require differential pressure testing in the VEGP program. However, it was not feasible to test these valves under flow conditions 3-33

1 because they are located in the suction piping to the containment spray pumps and stroking these valves under flow conditions would have resulted in a loss of suction head to the pumps which could damage the pumps. In addition, the 1/2HV-9002A/B and 1/2HV-9003 A/B valves which are aligned to provide suction from the sumps could not be tested under flow conditions because water is not normally available in the sumps.

Calculated Marcins The opening margins for valves 1/2HV-9002A/B were determined based on a i

design-basis differential pressure of 101 psid which is associated with the safety function of opening when transferring to cold-leg recirculation.

The opening margins for valves 1/2HV-9003 A/B were determined based on a design-basis differential pressure of 101 psid which is associated with the safety function of opening when transferring to cold-leg recirculation.

The opening margins for valves 1/2HV-9017A/B were determined based on a design-basis differential pressure of 66 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

Onenine Canability Marcin i

l 211V-9017B "

334 IHV-9017B "

334 211V-9017A 359 tilV-9017A 359 211V-9003B "

242

~

IHV-9003B 250 211V-9003A 246

~

Il1V-9003A 265 211V 9002B

~ 238

~

IIIV-9002B 238 211V-9002A 245 IIIV-9002A 245 0

50 100 150 200 250 300 350 400 Margin %

O 3-34

I f

The closing margins for valves 1/2HV-9002A/B were determined based on a l

design-basis differential pressure of 58 psid which is associated with the safety function of closing to isolate a passive failure leak of 50 gpm or less.

I The closing margins for valve.) 1/211V-9003A/B were determined based on a l

design-basis differential pressure of 58 psid which is associated with the safety function of closing to isolate a passive failure leak of 50 gpm or less.

j The closing margins for valves 1/2HV-9017A/B were determined based on a j

design-basis differential pressure of 23 psid which is associated with the safety l

function of closing when transferring to recirculation.

l Closine Capability & Setup MrJgina 211V-9017B 170 1IIV-9017B 170 2ilV-9017A 3is 1IIV-9017A 170 2HV-9003B us tilV-9003B ug 211V-9003A

,*a llIV-9003A 264 2HV-9002B 236 lHV-9002B 236 2HV-9002A 4

un

~

lHV c'E/.

0 50 100 150 200 250 300 350 400 Margin %

5 Capability Margin ESetup Margin Design-Basis Canability Justification

1. EPRI In-Situ Test Valve Number 19 is a 10 inch,1525 lb Westinghouse valve similar in design to the valves in group W-10. This valve was tested at a differential pressure of 265 psid and operated successfully. The test results were evaluated utilizing the NMAC methodology and the apparent opening and closing friction coefficients were less than 0.6.

3-35

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 238% and a closing setup margin of at least 98%. These margins are adequate to ensure that these l

valves will be capable of performing their design-basis function.

O l

'O 3-36

l l

3.12 Westinghouse Group W-11 Valves Description This group is composed of four,12 inch,316 lb, Westinghouse gate valves.

These valves are normally open to provide a flow path between the RWST and the suction of the RHR pumps. The valves have a safety function to close when transferring to cold-leg recirculation. The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 coefficient of friction.

Table 3-12 Westinghouse Group W-11 Valves Valve Tag Valve Descriotion Design Design Safety NE 2

2 Position Open Close Onen/Close 1HV-8812A RWST to RHR Pump Suction 430 25 Open/Close lHV-8812A RWST to RHR Pump Suction 430 25 Open/Close IHV-8812A RWST to RHR Pump Suction 430 25 Open/Close IHV-8812A RWST to RHR Pump Suction 430 25 Open/Close Differential Pressure Test Status These valves have a differential pressure test priority of 5 in the opening direction and 2 in the closing direction. Based on a priority ranking of 5 these valves require testing in the VEGP program. However, these valves are located in the suction piping to the RHR pumps and stroking these valves under flow conditions would have resulted in a loss of suction head and potential pump damage.

Therefore, these valves were not differential pressure tested.

Calculated Margin The opening margins for these valves were calculated based on a design-basis differential pressure of 430 psid which is associated with aligning the valves to their normal position during start-up. These valves do not have an active safety function to open.

.OU 3-37 1

O Openine Capability MarFinR 211V-8812B g4 tilV-8812B g4 2HV-8812A 34 tilV-8812A 22 0

10 20 30 40 50 Margin %

The closing margins for these valves were calculated based on a design-basis differential pressure of 25 psid which is associated with the safety function of closing when transferring to recirculation.

Closing Capability & Setup Marvinn 2 V-8812A IHV-8812A 863 0

200 400 600 800 1000 Margin %

5 Capability Margin ESetup Margin Desien-Basis Canability Justification

1. The design-basis differential pressure of 430 psid in the opening direction is associated with aligning the valves to their normal position during start-up. The calculation assumes that the RHR system remains pressurized and that the check valve downstream of these valves leaks, which in tum pressurizes the downstream side of these valves. These are extremely conservative assumptions and result in a much higher calculated differential pressure than would normally be expected at these valves. The 430 psid differential pressure translated into calculated margins which are as low as 14% for these valves. However, these valves are stroked open after securing the RHR system during each unit start-up, thereby demonstrating their ability to open. In addition, the valves do not have an active safety function to open.

O 3-38

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have a closing setup margin of at least 589%. This margin is adequate to ensure that these valves will be capable of closing to perform their design-basis function.

O O

3-39

l i

3.13 Westinehouse Group W-12 Valves Descrintion This group is composed of ten,12 inch,1525 lb, Westinghouse gate valves.

Valves 1/2HV-8701 A/B and 1/2HV-8702A/B are normally closed and have a j

safety function to open when aligning the RHR system for safety grade cold shutdown. Valves 1/2HV-8840 are normally closed and have a safety function to i

open when transferring to hot-leg recirculation to provide a flow path between the i

RHR pump discharge and the RCS hot-legs. The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 coefficient i

offriction.

I i

l Table 3-13

[

Group W-12 Valves l

Valve Tan Valve Descrintian Design Design Safc1X 2

h DE DE Position Open Close Open/Close 1HV-8701 A RCS to RHR Pump Suction 365 425 Open/Close

{

2HV-8701A RCS to RHR Pump Suction 365 425 Open/Close IHV-8701B RCS to RHR Pump Suction 365 425 Open/Close 2HV-8701B RCS to RHR Pump Suction 365 425 Open/Close IHV-8702A RCS to RHR Pump Suction 365 425 Open/Close 2HV-8702A RCS to RHR Pump Suction 365 425 Open/Close IHV-8702B RCS to RHR Pump Suction 365 425 Open/Close 2HV-8702B RCS to RHR Pump Suction 365 425 Open/Close j

1HV-8840 RHR to RCS Hot Legs 193 0

Open/Close j

2HV-8840 RHR to RCS Hot Legs 193 0

Open/Close i

i Differential Pressure Test Status i

Valves 1/2HV-8701 A/B and 1/2HV-8702A/B have a differential pressure test priority of 4 in the opening direction and 5 in the closing direction. Valves 1/2HV-8840 have a differential pressure test priority of 2 in the opening direction and 2 in the closing direction. Based on the priority 5 ranking valves 1/2HV-j 8701 A/B and 1/2HV-8702A/B require testing in the VEGP program. However, f

these valves are located in the suction piping to the RHR pumps and stroking these valves under flow conditions would result in a loss of suction head and potential pump damage. Therefore, these valves were not differential pressure 3-40

tested. Valves 1/2HV-8840 did not require testing due to their low priority ranking.

Calculated Margin l

The opening margins for valves 1/2HV-870lNB and 1/2HV-8702NB were determined based on a design-basis differential pressure of 365 psid which is associated with the safety function of opening to align the RHR system for safety grade cold shutdown.

l The opening margins for valves 1/2HV-8840 were detennined based on a design-basis differential pressure of 193 psid which is associated with the safety function of opening when transferring to hot-leg recirculation.

Opening Capability Maroin 2HV-8840 454 tilV-8840 454 2HV-8702B 149 111V-8702B 149 O

211V-8702A 149 IHV-8702A 149 2HV-870lB 149 IIIV-8701B 149 211V-8701A 149 IHV-8701 A 149 0

100 200 300 400 500 Margin %

The closing margins for valves 1/2HV-870lNB and 1/2HV-8702NB were determined based on a design-basis differential pressure of 425 psid which is associated with the safety function ofisolating the RCS from the RHR system.

These valves are controlled by a limit switch in the closing direction, therefore, the closing capability margin and setup margin are equivalent for these valves.

The closing margins for valves 1/2HV-8840 were determined based on a design-basis differential pressure of 0 psid which is associated with aligning the valve to its normal position prior to start-up.

Ov 3-41

O Closine Capability & Setup Marcinn 9

211V-8840 934g 9

IHV-8840 93qq

~

2ilV-8702B 55 llIV-8702B 55 2HV-8702A 55 IHV-8702A 55 2HV-8701B 55 iHV-8701B 55 2HV-8701 A 55 IIIV-870l A 55 0

500 1000 1500 2000 2500 Margin %

ECapability Margin ESetup Margin Desien-Basis Canability Justification

1. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 149%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

2. Based on conservative calculations of valve thrust requirements and operator capabilities valves 1/2HV-8840 have a closing setup margin of 1696%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

3. Based on conservative calculations of valve tiuust requirements and operator capabilities valves 1/2HV-8701 A/B and 1/2HV-8702A/B have a closing margin of 55%. Considering the conservative differential pressure utilized in the calculations, these margins are adequate to ensure that these valves will be capable of performing their design-basis function. It should be noted that the required closing thrust for these valves was calculated based on a design-basis differential pressure of 425 psid which is the maximum RCS pressure for RHR system operation. The 425 psid differential pressure was assumed in the calculations for conservatism and to avoid the complexity of performing a dynamic evaluation of the closing differential pressures for these valves. When manipulating the valves in conjunction with a normal plant startup, the RHR 3-42

pumps are secured prior to closing these valves. Since the pumps are not running there is no flow in the RHR system, therefore, these valves are not exposed to any differential pressure when performing this function. With respect to isolating a leak downstream of these valves, the RHR system is considered a moderate energy system. The limiting failures which inast be considered are through-wall cracks which would result in minimal leakage. The resulting differential pressure would occur primarily across the crack, with only limited differential pressure present across these valve:. Therefore, the use of a differential pressure of 425 psid in evaluating these valves results in a calculated margin which is very conservative relative to the design-basis functions the valve is required to perform.

O O

3-43 1

3.14 Westinehouse Groun W-13 Valves Descriotion This group is composed of four,14 inch,316 lb, Westinghouse gate valves.

These valves are normally closed and have a safety function to open when transferring to cold-leg recirculation to provide a flow path between the containment sumps and the suction of the RHR pumps. The valves have a safety function to close to isolate a passive failure leak ofless than 50 gpm during recirculation. The thrust requirements for these valves were calculated utilizing the EPRI NMAC equation with a 0.6 valve factor.

l Table 3-14 Westinghouse Group W-13 Valves l

Valve Tag Valve Descriotion Design Design Safety E

E Position 02:n Close Onen/Close i

iHV-8811 A Contain. Sump to RHR Pump 57 57 Open/Close 2HV-8811 A Contain. Sump to RHR Pump 57 57 Open/Close 1HV-8811B Contain. Sump to RHR Pump 57 57 Open/Close 2HV-8811B Contain. Sump to RHR Pump 57 57 Open/Close Differential Pressure Test Status These valves have a differential pressure test priority of 2 in the opening direction and 2 in the closing direction. The VEGP program requires that valves with a priority ranking of 4 or higher be tested, therefore, these valves did not require testing. In addition, the valves are located in the RHR pump suction piping and stroking the valves under flow conditions would result in a loss of suction head and potential pump damage.

Calculated Margin The opening margins for these valves were calculated based on a design-basis differential pressure of 57 psid which is associated with the safety function of opening when transferring to recirculation.

O 3-44

1 I

2 kiO l

Openine Capability Marvins l

211V-8811B i

iIIV-8811B v

211V-8811 A tilV-8811 A f

0 50 100 150 200 250 300 Margin %

The closing margins for these valves were determined based on a design-basis differential pressure of 57 psid which is associated with the safety function of closing to isolate a passive failure leak of 50 gpm or less while in recirculation.

Closing Canability & Setun Marcins is 0

50 100 150 200 250 300 350 Margin %

5 Capability Margin ESetup Margin Design-Basis Canability Justification

1. The design-basis differential pressures of 57 psid in the opening and closing direction is extremely low and result in loads which are not substantially higher than those encountered in a static test.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 230% and a closing setup margin of at least 179%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 3-45

' (3 4.0 FISHER GLOBE VALVES V

l There are a total of 22 Fisher globe valves included in the VEGP GL 89-10 I

program. The valves have been divided into three groups ofidentical valves as outlined in Table 4-1. The valves in groups FG-1 and FG-2 are of the unbalanced disk design and the valves in group FG-3 are of the balanced disk design.

Table 4-1 l

Valve Groups Group Manufacturer Valve Valve ANSI Total No.

Type Size Rating Valves FG-1 Fisher Globe 0.5 Inch 1710 lb 2

FG-2 Fisher Globe 2.0 Inch 900 lb 4

FG-3 Fisher Globe 4.0 Inch 900 lb 16 l

l The thrust requirements for these valves were determined by Fisher utilizing proprietary methodology. This methodology is discussed in more detail in Section 3.3.1.3 of the Program Summary Report.

The Fisher valves are equipped with valve stems utilizing standard ACME threads i

and a stem friction coefficient of 0.15 was utilized in calculating the stem factors for these valves. The basis for utilizing a 0.15 stem friction coefficient for these valves is outlined in Section 9.6 of the Program Summary Report.

The opening and closing capability margins were calculated for each of the valves in these groups. In addition, for valves which are controlled in the closing direction by a torque switch, the closing setup margin is also included. The setup margin takes into account test equipment accuracy, torque switch repeatability and Load Sensitive Behavior and for the purposes of this document values of 10%,5% and 20% respectively were utilized to account for these uncertainties. In practice, the values utilized for test equipment accuracy and torque switch repeatability would be determined based on each specific valve setup. Section 4.0 of the Program Summary Report discusses the various margins in detail and outlines the basis for determining the adjustments necessary to account for test equipment accuracy, torque switch repeatability and Load Sensitive Behavior.

O v

4-1 l

i 4.1 Fisher Group FG-1 Globe Valves Descrintion This group is composed of two,1/2 inch,1710 lb, Fisher globe valves. These valves are normally open and have a safety function to close on a containment isolation signal to isolate the RCS from the nuclear sampling system. The thrust requirements for these valves were determined by Fisher utilizing proprietary methodology.

l Table 4-1 Fisher Group FG-1 Globe Valves Valve Tag Valve Descrintion Design Design Safety thL 2

2 Position Osn Close Onen/Close IHV-3548 RCS Hot Leg Sample 2485 2485 Close 2HV-3548 RCS Hot Leg Sample 2485 2485 Close Differential Pressure Test Status These valves have a differential pressure test priority of 5 in the opening direction and 5 in the closing direction. Based on the priority 5 ranking the valves require testing in the VEGP program. However, due to the extremely small size of these valves and the fact that the valves are located inside containment, these valves were not differential pressure tested. A containment entry, with the RCS at rated temperature and pressure, was not warranted to test these valves in light of the i

data which had been accumulated at VEGP on the larger Fisher unbalanced disk globe valves.

Calculated Maroin The opening margins were determined based on a design-basis differential pressure of 2485 psid which is associated with recovering from mispositioning.

These valves do not have an active safety function to open.

O 4-2

l Openine Capability Marcins 211V-3548 129 tilV-3548 129 0

50 100 150 200 Margin %

The closing margins were determined based on a design-basis differential pressure of 2485 psid which is associated with the safety function of closing on a containment isolation signal to isolate the RCS from the nuclear sampling system.

Closing Capability & Setup Marvinn i V 0

50 100 150 200 Margin %

ECapability Margin ESetup Margin Design-Basis Canability Justification (q)

1. Valves 1/2HV-5154 and 1/2HV-5155 ( Group FG-2) are similar in design to the 1/2HV-3548 valves and these valves were differential pressure tested in-situ at VEGP and performed within the bounds of the thrust predicted by the Fisher methodology. The actual opening thrusts ranged from 2% to 42% of the predicted values and the actual closing thrusts ranged from 24% to 52% of the predicted values.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of 129% and a closing setup margin of 68%. In addition, the margins for these MOVs are limited by the valve allowable rather than the operator capability. The margins based on operator capability are significantly higher, and the existing margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O O

4-3

O 4.2 Fisher Group FG-2 Globe Valves V

Descrintion This group is composed of four,2 inch,900 lb, Fisher globe valves. These valves are normally open to provide the motor-driven AFW pumps with a miniflow path to the Condensate Storage Tank (CST) and have a safety function to close on high AFW pump flow. The valves have a safety function to open on low AFW pump flow. The thrust requirements for these valves were determined by Fisher utilizing proprietary methodology.

Table 4-2 Fisher Group FG-2 Globe Valves Valve Tag Valve Desenption Design Design Safety.

Em 2

2 Position Ogm Close Onen/Close IFV-5154 AFW Pump Miniflow 1715 1715 Open/Close 2FV-5155 AFW Pump Miniflow 1715 1715 Open/Close O

IFV-5154 AF # Pump Miniflow 1715 1715 Open/Close 2FV-5155 AFW Pump Miniflow 1715 1715 Open/Close Differential Pressure Test Status These valves have a differential pressure test priority of 5 in the opening direction and 5 in the closing direction. Based on the priority 5 ranking the valves require testing in the VEGP program and differential pressure tests on these valves have been completed.

Calculated Margin The opening margins were determined based on a design-basis differential pressure of 1715 psid which is associated with the safety function of opening on low AFW flow to provide a miniflow path to the CST.

OV 4-4

Openine Capability Marvins 2FV-5155 193 iFV-5155 193 2FV-5154 193 iFV-5154 193 0

50 100 150 200 Margin %

The closing margins for these valves were determined based on a design-basis differential pressure of 1715 psid which is associated with closing to isolate miniflow on high AFW pump flow. These valves are controlled by a limit switch in the closing direction, therefore, the closing capability margin and setup inargin are equivalent for these valves.

Closine Capability Marvins 2FV-5155 393 IFV-5155 193 2FV-5154 g93 IFV-5154 0

50 100 150 200 Margin %

Design-Basis Canability Justification

1. Valves 1/2HV-5154 and 1/2HV-5155 were differential pressure tested in-situ at VEGP and performed within the bounds of the thrust predicted by the Fisher methodology. The actual opening thrusts ranged from 2% to 42% of the predicted values and the actual closing thrusts ranged from 24% to 52% of the predicted values.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of 193% and a closing margin of at least 193%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 4-5

4.3 Group FG-3 Descriotion This group is composed of sixteen,4-0 inch,900 lb, Fisher globe valves. These valves are utilized in the AFW system to control feedwater flow to the steam generators. The thrust requirements for these valves were determined by Fisher utilizing proprietary methodology.

Valves 1/2HV-5120,1/2HV-5122,1/2HV-5125 and 1/2HV-5127 are normally open to provide a flow path from the turbine-driven AFW pump to the steam generators. The valves have a safety function to open and close as required to modulate flow to each individual steam generator.

Valves 1/2HV-5132,l/2HV-5134,1/2HV-5137 and 1/2HV-5139 are normally open to provide a flow path from the motor-driven AFW pumps to the steam generators. The valves have a safety function to open and close as required to modulate flow to each individual steam generator.

Table 4-3 Fisher Group FG-3 Globe Valves i

Valve Tag Valve Descriotion Design Design Safety M

M Position Open Close Ooen/Close IHV-5120 AFW Pump Discharge Train C 1776 1776 Open/Close 2HV-5120 AFW Pump Discharge Train C 1776 1776 Open/Close IHV-5122 AFW Pump Discharge Train C 1776 1776 Open/Close 2HV-5122 AFW Pump Discharge Train C 1776 1776 Open/Close IHV-5125 AFW Pump Discharge Train C 1765 1765 Open/Close 2HV-5125 AFW Pump Discharge Train C 1765 1765 Open/Close 1HV-5127 AFW Pump Discharge Train C 1765 1765 Open/Close 2HV-5127 AFW Pump Discharge Train C 1765 1765 Open/Close IHV-5132 AFW Pump Discharge Train B 1765 1765 Open/Close 2HV-5132 AFW Pump Discharge Train B 1765 1765 Open/Close 1HV-5134 AFW Pump Discharge Train B 1765 1765 Open/Close 2HV-5134 AFW Pump Discharge Train B 1765 1765 Open/Close IHV-5137 AFW Pump Discharge Train A 1767 1767 Open/Close 2HV-5137 AFW Pump Discharge Train A 1767 1767 Open/Close 1HV-5139 AFW Pump Discharge Train A 1767 1767 Open/Close 2HV-5139 AFW Pump Discharge Train A 1767 1767 Open/Close O

45

Differential Pressure Test Status Valves 1/2HV-5120,1/2HV-5122,1/2HV-5125 and 1/2HV-5127 have a differential pressure test priority of 5 in the opening direction and 5 in the closing direction. Valves 1/2HV-5132,1/2HV-5134,1/2HV-5137 and 1/2HV-5139 have a differential pressure test priority of 4 in the opening direction and 4 in the closing direction. The valves with a priority 5 ranking require testing in the VEGP program. However, based on Georgia Power's letter of December 2,1992 to the NRC the scope of valves to be tested in this group was reduced to a total of four valves. The justification for reducing the test scope was that globe valves are predictable performers and four valves would be sufficient to identify any

. problems within this group of valves. The purpose of reducing the scope was to maintain the total number of valves to be tested approximately constant while increasing the number of Westinghouse gate valves to be tested.

In addition, two of the priority 4 valves were substituted for two of the priority 5 valves. The priority 5 valves are located in the turbine-driven AFW systems and the priority 4 valves are located in the motor-driven AFW systems. The turbine-driven AFW discharge valves which were tested saw only limited differential pressures due to the relatively high steam pressure required in the steam p

generators to operate the turbine-driven AFW systems. The steam generator Q

pressure is present on the downstream side of the discharge valves, thereby limiting the differential pressure developed across these valves. The valves located in the motor-driven AFW systems could be tested at a much higher differential pressure since the steam generators could be depressurized when the testing was performed. The valves themselves are identical and the reason the priority rankings vary is due to the capability of the operators installed on the respective valves.

Calculated Margin The opening margins were determined based on a design-basis differential pressure of 1765,1767 or 1776 psid which is associated with the safety function of opening as required to control AFW flow.

O 4-7

1

i 1

l

O J

Onenine Canability Marcin 211V-5139 400 tilV-5139 400 211V-Sl37 400 lHV-5137 400 2HV-5134 333 IllV-5134 333 2HV-5132 333 IHV-5132 333 211V-5127 138 lHV-5127 138 211V-5125 m 138 iHV-5125 138 211V-5122 m l38 O

lilV-5122 138 2HV-5120 138 IHV-5120 138 l

l l

l l

l l

0 50 100 150 200 250 300 350 400 Margin %

The closing margins were determined based on a design-basis differential pressure of 1765,1767 or 1776 psid which is associated with the safety function of closing as required to control AFW flow.

O 4-8 i

I i

l lo Closine Canability & Setun Marvins 180 2ilV-5139 380 IHV-5139 180 2HV-5137 l

380 l

IHV-5137 l

2HV-5134 180 180 lHV 5134 l

380 2HV-5132 l

180 IHV-5132 4

2HV-5127 333 f

74 IHV-5127 m

211V-5125 g3g 74 74 IllV-5125 m

74 2HV-5122 33g 74 j

lHV-5122 138 74 2HV-5120 138 74 IHV-5120 18 O

50 100 150 200 250 300 Margin %

ECapability Margin ESetup Margin Design-Basis Canability Justification

1. Valves 1HV-5137, IHV-5139,2HV-5120 and 2HV-5122 were differential pressure tested in-situ at VEGP and performed within the bounds of the thrust predicted by the Fisher methodology. The actual opening thrusts ranged from 19% to 55% of the predicted values and the actual closing thrust ranged from 71%

to 86% of the predicted values.

2. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 138% and a closing setup margin of at least 74%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 4-9

O 5.0 VELAN GLOBE VALVES v

There are a total of 36 Velan globe valves included in the VEGP GL 89-10 program. The valves are all of the unbalanced disc, seat-based design. The valves have been divided into three groups ofidentical valves as outlined in Table 5-1.

Table 5-1 Valve Groups Group Manufacturer Valve Valve ANSI Total No.

Type Size Rating Valves V-1 Velan Globe 1.0 Inch 1500 lb 2

V-2 Velan Globe 1.5 Inch 1500 lb 12 V-3 Velan Globe 2.0 Inch 1500 lb 2'

Although the Velan valves have been divided into three groups based on the manufacturers stated valve size, the performance of all of the groups are similar.

The stated valve sizes are based on the diameter of the valve nozzle connections rather than the seat diameter. All of the valves utilize a nominal 1.875" seat O

diameter and, therefore, are essentially identical with respect to valve thrust V

requirements and overall performance.

The thrust requirements for these valves were calculated with the EPRI Performance Prediction Program (PPP) methodology for seat based globe valves.

This methodology is discussed in more detail in Section 3.3.1.4 of the Program Summary Report.

The Velan valves are equipped with valve stems utilizing standard ACME threads and a stem friction coefficient of 0.15 was utilized in calculating the stem factors for these valves. The basis for utilizing a 0.15 stem friction coefficient for these valves is outlined in Section 9.6 of the Program Summary Report.

The opening and closing capability margins were calculated for each of the valves in these groups. In addition, for valves which are controlled in the closing direction by a torque switch, the closing setup margin is also included. The setup margin takes into account test equipment accuracy, torque switch repeatability and Load Sensitive Behavior and for the purposes of this document values of 9.5%,5% and 20% respectively were utilized to account for these uncertainties. In practice, the values utilized for test equipment accuracy and torque switch repeatability would be determined based on each specific valve setup. Section 4.0 g

of the Program Summary Report discusses the various margins in detail and V

5-1

O outlines the basis for determining the adjustments necessary to account for test v

equipment accuracy, torque switch repeatability and Load Sensitive Behavior.

In reviewing the various margins contained in this document it should be noted that the margins are based on the MOV's as-modified configuration. A total of 22 Velan valves are scheduled to be modified in the 1996 refueling outages and the margins outlined in this document reflect those modifications. Section 6.2 of the Program Summary Report identifies the valves to be modified as well as the various modifications.

O 5-2

O 5.1 Velan Group V-1 Valves v

Descriotion This group is composed of two 1 inch,1500 lb, Velan globe valves. These valves are normally closed and receive a close signal on a safety injection (SI) signal.

The valves have a safety function to open to provide a safety grade charging path on a loss ofinstrument air. The thrust requirements for these valves were calculated utilizing the EPRI Performance Prediction Methodology for seat based globe valves.

Table 5-2 Velan Group V-1 Valves Valve Tag Valve Descriotion Design Design S;)f4 Na, T

2 Position Open Close Onen/Close 1HV-8116 CCP A Discharge 2674 0

Open/Close 2HV-8116 CCP A Discharge 2674 0

Open/Close O

V RifCI:2tial Pressure Test Status These valves have a differential pressure test priority of 6 in the opening direction and 2 in the closing direction. Based on the priority 6 ranking the valves require testing in the VEGP program. Differential pressure tests on these valves have been completed.

4 Calculated Margins The opening margins were determined based on a design-basis differential pressure of 2674 psid which is associated with the valves safety function of opening to provide a safety grade charging path.

Openine Capability Marvins 211V-8116 lHV-8116 0

20 40 60 80 100 Margin %

The closing margins were calculated based on a design-basis differential pressure O

of 0 psid which is associated with the mispositioning of these valves. These V

valves do not have an active safety function to close.

5-3

Closine Capability & Setun Marcins

':::::::h O

50 100 150 200 250 300 Margin %

5 Capability Margin aSetup Margin Design-Basis Canability Justification

1. Valves 1/2HV-8816 were differential pressure tested in-situ at VEGP and performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology. The actual opening thrusts were 92% and 64%

of the predicted values respectively.

2. A total of twenty additional Velan globe valves were differential pressure tested at VEGP and each of these valves operated successfully. Sufficient data was collected in sixteen of the tests to evaluate the thrust requirements against the EPRI predicted thrusts and in all cases the test thrust requirements were bounded by the calculations.

3. Based on conservative calculations of valve thrust requirements and operator capabilities valves 1/2HV-8816 have an opening margin of 54% and a closing margin of 125%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

O 5-4

i l

5.2 Velan Groun V-2 Valves Description l

l This group is composed of 12,1-1/2 inch,1500 lb, Velan globe valves. Valves 1/2HV-8103A,B,C&D are normally open to provide reactor coolant pump (RCP) seal injection flow and have a safety function to close to isolate a line break inside containment. Valves 1/2HV-8814 and 1/2HV-8920 are normally open to provide A and B train SI pump miniflow respectively to the reactor water storage tank (RWST) and have a safety function to close when transferring to cold-leg recirculation. The thrust requirements for these valves were calculated utilizing the EPRI Performance Prediction Program Methodology.

Table 5-3 Velan Group V-2 Valves Valve Tag Valve Description Design Dsagn SafdX No.

E DE Position Dan Close Open/Close 1HV-8103A RCP 1 Seal Water inlet 2715 2715 Open/Close 2HV-8103A RCP 1 Seal Water Inlet 2715 2715 Open/Close O

IHV-8103B RCP 1 Seal Water Inlet 2715 2715 Open/Close 2HV-8103B RCP 1 Seal Water Inlet 2715 2715 Open/Close IHV-8103C RCP 1 Seal Water inlet 2715 2715 Open/Close 2HV-8103C RCP 1 Seal Water Inlet 2715 2715 Open/Close IHV-8103D RCP 1 Seal Water Inlet 2715 2715 Open/Close i

2HV-8103D RCP 1 Seal Water Inlet 2715 2715 Open/Close 1HV-8814 SI Pump A Miniflow Isolation 1521 1521 Open/Close 2HV-8814 SI Pump A Miniflow Isolation 1521 1521 Open/Close IHV-8920 S1 Pump B Miniflow Isolation 1521 1521 Open/Close 2HV-8920 SI Pump B Miniflow isolation 1521 1521 Open/Close i

Differential Pressure Test Status Valves 1/2HV-8103A,B,C&D have a differential pressure test priority of 6 in the opening direction and 6 in the closing direction. Valves 1/2HV-8814 and 1/2HV-8920 have a differential pressure test priority of 5 in the opening direction and 5 in the closing direction. Based on the 5 and 6 priority rankings all of these valves would require testing in the VEGP program. However, based on Georgia Power's letter of December 2,1992 to the NRC the scope of valves to be tested in this group was reduced to a total of four valves. The justification for reducing the test scope was that globe valves are predictable performers and four valves would be 5-5

O sufficient to identify any problems within this group of valves. The purpose of reducing the scope was to maintain the total number of valves to be tested approximately constant while increasing the number of Westinghouse gate valves to be tested. Valves lHV-8103B, lHV-8103C, lHV-8920 and iHV-8814 have been differential pressure tested.

Calculated Margins The opening margins for valves 1/2HV-8103A,B,C&D were determined based on a design-basis differential pressure of 2715 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margins for valves 1/2HV-8814 and 1/2HV-8920 were determined based on a design-basis differential pressure of 1521 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

Openina Capability Marcins 2HV-8920 O

IHV-8920 345 211V-8814 345 I HV-8814 345 2HV-8103D m 153 IHV-8103D 153 2ilV-8103C 153 liiV-8103C m 153 2ilV-8103B 140 tilV-8103B 153 2HV-8103A ' m l40 IHV-8103A m l53 0

50 100 150 200 250 300 350 400 Margin %

The closing margins for valves 1/2HV-8103A,B,C&D were determined based on a design-basis differential pressure of 2715 psid which is associated with the safety function of closing to isolate a line break inside containment.

O 5-6

O The closing margins for valves 1/2HV-8814 and 1/2HV-8920 were determined based on a design-basis differential pressure of 1521 psid which is associated with the safety function of closing to isolate SI pump miniflow to the RWST when transferring to cold-leg recirculation.

ClosinF Capability & Setup Marvinn 211V-8920 gg4 1IIV-8920 gg4 211V-8814 65 1IIV-8814 yg4 7

2HV-8103D 73 IHV-8103D 73 2ilV-8103C 73 7

tilV-8103C 73 21tV-8103B 73 Il1V-8103B 73 211V-8103A 73 IIIV-8103A 73 O

I I

I O

50 100 150 200 Margin %

BCapability Margin aSetup Margin Design-Basis Canability Justification

1. Valves IHV-8103A/B, lHV-8814 and 1HV-8920 were differential pressure tested in-situ at VEGP and operated successfully. Only valve IHV-8920 had valid test data and this valve performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology. The actual closing thrust was 73% of the predicted value.

2. A total of eighteen additional Velan globe valves were differential pressure tested at VEGP and each of these valves operated successfully. Sufficient data was cellected in seventeen of the tests to evaluate the thrust requirements against the EPRI predicted thrusts and in all cases the test thrust requirements were bounded by the calculations.

3. Based on conservative calculations of valve thrust requirements and operator O

capabilities these valves have an opening margin of at least 140% and a closing 5-7

setup margin of at least 27% with the exception of valve 2HV-8814 which has a margin of 21%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

It should be noted that valve 2HV-8814 is limited by the torque rating of the spring pack. With a stiffer spring pack this valve required a torque switch setting of 1 to fall within the design range of the valve. A lighter spring pack was installed and the valve was setup successfully with a torque switch setting of 2.

The torque switch setting of 2 indicates that substantial additional margin exists, although the valve appears to be spring pack limited when evaluated analytically.

OU O

5-8 e

~

5.3 Velan Groun V-3 Valves Descriction This group is composed of 22,2 inch,1500 lb, Velan globe valves. These valves are utilized in a variety of applications in the Safety injection (SI) system and the Chemical and Volume Control System (CVCS). The thrust requirements for l

these valves were calculated utilizing the EPRI Performance Prediction Methodology for seat-based globe valves.

Table 5-4 Velan Group V-4 Valves Valve Tag Valve Descriotion Design Design Safety E

M Position Open Close Onen/Close IHV-8100 RCP Seal WaterIsolation 160 160 Close 2HV-8100 RCP Seal Water Isolation 160 160 Close 1HV-8104 BAST to CCP A 91 91 Open/Close 2HV-8104 BAST to CCP A 91 91 Open/Close 1HV-8110 CCP Miniflow Isolation 2644 2676 Close IHV-8110 CCP Miniflow Isolation 2644 2676 Close IHV-8111 A CCP Miniflow Isolation 2643 2676 Close 2HV-8111 A CCP Miniflow Isolation 2643 2676 Close 1HV 8111B CCP Miniflow Isolation 2643 2676 Close 2HV-8111B CCP Miniflow isolation 2643 2676 Close iHV-8112 RCP Seal Water Isolation 159 159 Close 2HV-81l'2 RCP Seal Water Isolation 159 159 Close 1HV-8508A CCP Miniflow Isolation 2641 2620 Open/Close 2HV-8508A CCP Miniflow Isolation 2641 2620 Open/Close 1HV-8508B CCP Miniflow Isolation 2641 2620 Open/Close 2HV-8508B CCP Miniflow Isolation 2641 2620 Open/Close 1HV-8509A CCP Miniflow Isolation 2641 2620 Open/Close 2HV-8509A CCP Miniflow isolation 2641 2620 Open/Close 1HV-85098 CCP Miniflow Isolation 2641 2620 Open/Close 2HV-8509B CCP Miniflow Isolation 2641 2620 Open/Close IHV-8813 S1 Pump Common Miniflow 0

1521 Open/Close IHV-8813 SI Pump Common Miniflow 0

1521 Open/Close 5-9

(' s Valves 1/2HV-8100 are normally open to provide RCP seal water return flow and have a safety function to close on a containment isolation signal.

l s

Valves 1/2HV-8104 are normally closed and have a safety function to open to provide an emergency boration flow path from the boric acid transfer pump to the suction of the CCPs. The valves have a safety function to close following emergency boration.

Valves 1/2HV-8110 are normally open to provide CCP miniflow to the seal water heat exchanger and have a safety function to close on a safety injection signal to isolate normal CCP miniflow.

Valves 1/2HV-8111 A/B are normally open to provide CCP miniflow to the seal water heat exchanger and have a safety function to close on a safety injection signal to isolate normal CCP miniflow.

Valves 1/2HV-8112 are normally open to provide RCP seal water return flow and have a safety function to close on a containment isolation signal.

Valves 1/2HV-8508A/B are normally closed and have a safety function to open on a safety injection signal concurrent with high CCP discharge pressure to provide CCP miniflow to the RWST. The valves have a safety function to close e

t when transferring to cold-leg recirculation.

Valves 1/2HV-8509A/B are normally open and have a safety function to close when transferring to cold-leg recirculation i

Valves 1/2HV-8813 are normally open to provide SI pump miniflow to the RWST and have a safety function to close when transferring to cold-leg recirculation.

DifTerential Pressure Test Status All of the valves in this group with the exception of valves 1/2HV-8100,1/2HV-8104 and 1/2HV-8112 have differential test priorities of 5 or 6. All of the valves with differential pressure test priorities of 5 or 6 have been tested.

Calculated Margins The opening margins for valves 1/2HV-8100 were determined based on a design-basis differential pressure of 160 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

O The opening margins for valves 1/2HV-8104 were determined based on a design-V basis differential pressure of 91 psid which is associated with the safety function 5-10 i

i

of opening to provide an emergency boration flow path from the boric acid transfer pump to the suction of the CCPs.-

The opening margins for valves 1/2HV-8110 were determined based on a design-basis differential pressure of 2644 psid which is associated with recovering from i

mispositioning. These valves do not have an active safety function to open.

The opening margins for valves 1/2HV-8111 A/B were determined based on a design-basis differential pressure of 2643 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margins for valves 1/2HV-8112 were determined based on a design-basis differential pressure of 159 psid which is associated with recovering from mispositioning. These valves do not have an active safety function to open.

The opening margins for valves 1/2HV-8508A/B and 1HV-8509A/B were determined based on a design-basis differential pressure of 2641 psid which is associated with the safety function of opening to provide CCP miniflow to the RWST.

The opening margins for valves 1/2HV-8813 were determined based on a design.

basis differential pressure of 0 psid which is associated with the aligning these O'

valves to their normal position during start-up. These valves are provided with interlocks to prevent mispositioning and the valves do not have an active safety function to open.

V 5-11

i Openina Capability Marains 211V-8813 791 lHV-8813 791 2flV-8509B 109 111V-8509B 109 2iiV-8509A 106 IHV-8509A 106 2flV-8508B Mil 4 j

IHV-8508B 107 2HV-8508A 109 IHV-8508A 104 2ilV-8112 g m 852 IHV-8112

~

805 2ilV-6111B 159 IHV-8111 B 148 211V-8111 A 152 IHV-8111 A 133 2iiV-8110 145 lilV-8110 145 2HV-8104 tilV-8104 211V-8100 716 IHV-8100 716 0

200 400 600 800 1000 Margin %

O 5-12

=

The closing margins for valves 1/2HV-8100 were determined based on a design-basis differential pressure of 160 psid which is associated with the safety function of closing on a containment isolation signal.

The closing margins for valves 1/2HV-8104 were determined based on a design-basis differential pressure of 91 psid which is associated with the safety function of closing following emergency boration.

The closing margins for valves 1/2HV-8110 were determined based on a design-basis differential pressure of 2676 psid which is associated with the safety function of closing to isolate normal CCP miniflow on an SI signal.

The closing margins for valves 1/2HV-8111 A/B were determined based on a design-basis differential pressure of 2676 psid which is associated with the safety function of closing to isolate normal CCP miniflow on an SI signal.

The closing margins for valves 1/2HV-8112 were determined based on a design-basis differential pressure of 159 psid which is associated with the safety function of closing on a containment isolation signal.

The closing margins for valves 1/2HV-8508A/B and 1/2HV-8509A/B were determined based cn a design-basis differential pressure of 2620 psid which is p) associated with the safety function of closing to isolate CCP miniflow to the s.

RWST when transferring to cold-leg recirculation.

The closing margins for valves 1/2HV-8813 were determined based on a design-basis differential pressure of 1521 psid which is associated with the safety function of closing to isolate Si pump miniflow to the RWST when transferring to cold-leg recirculation.

O 5-13

\\

i

!O l

Closine Capability & Setup Marvins i

i 57 211V-8813 g

57 lilV-8813 334 30 211V-8509B 77 3U IHV-85098 77 29 l

211V-8509A 75 29 IHV-8509A 75 l

34 l

211V-8508B 82 30 IHV-8508B 76 30 211V-8508A 77 27 j

tilV-8508A 72 211V-8112 380 380 j

lHV-8112 552 3d l

211V-811111 82 ilIV-8t ilB 74 211U-8111 A 74 8

i IHV-S!!!4 74 2ilV-Sil0 74 j

llIV-8110 74 435 2tiV-8104 435 tilV-8104 376 211V-8100

,y 376 tilV-8100

546, 0

100 200 300 400 500 600 700 Margin %

ECapability Margin mSetup Margin 9

5-14

Design-Basis Canability Justification

1. Valves 1/211V-8110,1/211V-8111 A/B,1/2HV-8508A/B,1/211V-8509A/B and 3

1/211V-8813 were differential pressure tested in-situ at VEGP and operated i

successfully. Fifteen of the sixteen valves tested had valid test data and all of these valves performed within the bounds of the thrust predicted by the EPRI Performance Prediction Program methodology. The actual closing thrusts ranged

]

from 69% to 95% of the predicted value.

4

2. A total of six additional Velan globe valves were differential pressure tested at VEGP and each of tuese valves operated successfully. Sufficient data was collected in three of the tests to evaluate the thrust requirements against the EPRI predicted thrusts and in all cases the test thrust requirements were bounded by the calculations.

4 l

3. Based on conservative calculations of valve thrust requirements and operator capabilities these valves have an opening margin of at least 104% and a closing 2

tup margin of at least 27%. These margins are adequate to ensure that these se valves will be capable of performing their design-basis function.

O 5-15 i

P 6.0 FISHER BUTTERFLY VALVES

.O There are a total of 70 Fisher butterfly valves in the VEGP GL 89-10 program.

The valves are of the non-symmetrical disc, single offset design. These valves have been divided into six groups ofidentical valves as outlined in Table 6-1.

Groups FB-5A and FB-5B rppear to be identical based on the criteria identified in the table, however, the valves in group FB-5A utilize 2 inch stems and the valves in group FB-5B utilized 2-1/2 inch stems. Since torque requirements vary as a function of stem diameter the valves were placed in separate groups.

Table 6 Valve Groups Group Manufacturer Valve Valve ANfil 1 0181

_Ng, Tyne Size Ratino Valves FB-1 Fisher -

Butterfly 4.0 Inch 150 lb 4

FB-2 Fisher Butterfly 8.0 Inch 150 lb 28 FB-3 Fisher Butterfly 10.0 Inch 150 lb 10 FB-4 Fisher Butterfly 18.0 Inch 150 lb 16 FB-5A Fisher Butterfly 24.0 Inch 150lb 8

FB-5B Fisher Butterfly 24.0 Inch 150 lb 4

O The torque requirements for these valves were calculated utilizing a combination of Fisher and EPRI NMAC methodology. The dynamic torque requirements were calculated utilizing the Fisher methodology while the packing loads were calculated utilizing the EPRI NMAC methodology. This methodology is discussed in more detail in Section 3.3.1.5 of the Program Summary Report.

The opening and closing capability margins were calculated for each of the valves in these groups. It should be noted that setup margins were not included for these valves although the opening and closing torque switches for these valves are currently in service. However, the opening and closing torque switches for these valves will be bypassed in conjunction with each valves next scheduled preventive maintenance or periodic test. In addition, certain valves will be repacked based on a revised packing configuration to ensure that the static loads for these valves are bounded by the packing loads utilized in the calculations. The margins outlined in this document reflect the bypassing of the opening and closing torque switches and the installation of the revised packing configuration as applicable. Section 6-2 of the Program Summary Report identified the valves to be modified and the associated schedules for these modifications.

O 6-1

6.1 Fisher Group FB-1 Butterfly Valves Descriotion This group is composed of four,4 inch,150 lb, Fisher butterfly valves. These valves are normally closed and have a safety function to open when placing the Containment Post LOCA Purge system in operation following the loss of both hydrogen recombiners. The valves have a safety function to close following a failure of the filtration system. The torque requirements for these valves were calculated utilizing proprietary Fisher methodology with packing loads derived from an EPRI NMAC equation.

Table 6-2 Fisher Group FB-1 Butterfly Valves Valve Tag Valve Descrintion Design Design Safety DE DE Position Onen Close Ooen/Close IHV-2624A Post LOCA Purge Exhaust 37 37 Open/Close 2HV-2624A Post LOCA Purge Exhaust 37 37 Open/Close IHV-2624B Post LOCA Purge Exhaust 37 37 Open/Close Q

2HV-2624B Post LOCA Purge Exhaust 37 37 Open/Close Differential Pressure Test Status These valves have a differential pressure test priority of 2 in the opening direction and 2 in the closing direction. The VEGP program only requires that Fisher butterfly valves with a differential pressure test priority of 5 or higher be differential pressure tested, therefore, these valves were not tested.

Calculated Margins The opening margins were determined based on a design-basis differential pressure of 37 psid which is associated with the safety function of opening to place the Containment Post LOCA Purge system in operation.

O 6-2

~_ - - -

i Openine Capability Marvinn 21{V-2624B IIIV-2624B 2flV-2624A lilV-2624A O

20 40 60 80 100 Margin %

4

}

The closing margins were determined based on a design-basis differential pressure j

of 37 psid which is associated with the safety function of closing following a failure of the Containment Post LOCA Purge system.

I j

Closing Capability Marcinn f

211V-26248 llIV-26248

~'

2HV-2624A tilV-2624A

"^

0 20 40 60 80 100 Margin %

Design-Basis Canability Justification

1. Valves 1HV-1823,1HV-1831,2HV-2135 and 2HV-2139 are 8 inch,150 lb Fisher butterfly valves similar in design to the valves in group FB-1. These valves were differential pressure tested in-situ at VEGP and their performance was consistent with that predicted by the Fisher methodology. The actunt dynamic opening torques were 62% to 105% of the predicted values and the actual closing torques were 96% to 105% of the predicted values.

2. Based on conservative calculations of valve torque requirements and operator capabilities these valves have an opening margin of 88% and a closing margin of 88%. These margins are adequate to cre.ae that these valves will be capable of performing their design-basis function.

/

O 6-3

i 4

6.2 Fisher Group FB-2 Butterftv Valut Description This group is composed of twenty-eight, 8 inch,150 lb, Fisher batterfly valves.

These valves are utilized in a variety of applications in the Auxiliary Feedwater (AFW) system and the Nuclear Service Cooling Water (NSCW) system. The torque requirements for these valves were calculated utilizing proprietary Fisher methodology with packing loads derived from an EPRI NMAC equation.

Valves 1/2HV-1806,1/2HV-1807,1/2HV-1808,1/2HV-1809,1/2HV-1822, 1/2HV-1823,1/2HV-1830 and 1/2HV-1831 are normally open to provide NSCW flow to the containment coolers. The valves have a safety function to close on a j

manual actuation to provide containment isolation.

Valves 1/2HV-2134,1/2HV-2135,1/2HV-2138 and 1/2HV-2139 are normally open to provide NSCW flow to the containment auxiliary coolers and the reactor cavity coolers. The valves have a safety function to close on a loss ofoff-site power or an SI signal to divert NSCW flow to more critical loads.

Valves 1/2HV-5118 and 1/2HV-5119 are normally closed and have a safety function to open on a decreasing level in Condensate Storage Tank (CST) 001 to provide a suction path from CST 002 for the motor-driven AFW pumps.

DifferentinI Pressure Test Stntm Valves 2HV-5118 and 2HV-5119 have a differential pressure test priority of 4 in the opening and closing direction. Valves 1HV-5118 and 1HV-5119 have a differential pressure test priority of 2 in the opening and closing direction. The remaining valves in this group have a differential pressure test priority of 2 in the opening and closing direction. The VEGP program only requires that Fisher butterfly valves with a differential pressure test priority of 5 or higher be differential pressure tested. However, in order to validate the Fisher methodology valves 1HV-1823, lHV-1831,2HV-2135 and 2HV-2139 were differential

- pressure tested.

OU 6-4

1 O.

Table 6-3 j

Fisher Group FB-2 Butterfly Valves

~

Valve Tan Valve Description DCsign DCsign Safety h

DE DE Position Onen Close Onen/Cinne 1HV-18%

NSCW to Containment Cooler 74 74 Open/Close 2HV-1806 NSCW to Containment Cooler 74 74 Open/Close 1HV-1807 NSCW to Containment Cooler 70 70 Open/Close 2HV-1807 NSCW to Containment Cooler 70 70 Open/Close 1HV-1808 NSCW to Containment Cooler 74 74 Open/Close 2HV-1808 NSCW to Containment Cooler 74 74 Open/Close 1HV-1809 NSCW to Containment Cooler 70 70 Open/Close 2HV-1809 NSCW to Containment Cooler 70 70 Open/Close 1HV-1822 NSCW from Containment Cooler 74 74 Open/Close 2HV-1822 NSCW from Containment Cooler 74 74 Open/Close IHV-1823 NSCW from Containment Cooler 70 70 Open/Close 2HV-1823 NSCW from Containment Cooler 70 70 Open/Close 1HV-1830 NSCW from Containment Cooler 70 70 Open/Close 2HV-1830 NSCW from Containment Cooler 70 70 Open/Close O

1HV-1831 NSCW from Containment Cooler 70-70 Open/Close 2HV-1831 NSCW from Containment Cooler 70 70 Open/Close 1HV-2134 NSCW to Reactor Cavity Cooler 70 70 Close 2HV-2134 NSCW to Reactor Cavity Cooler 70 70 Close IHV-2135 NSCW to Reactor Cavity Cooler 73 73 Close 2HV-2135 NSCW to Reactor Cavity Cooler 73 73 Close IHV-2138 NSCW from Reac. Cavity Cooler 70 70 Close 2HV-2138 NSCW from Reac. Cavity Cooler 70 70 Close IHV-2139 NSCW from Reac. Cavity Cooler 73 73 Close 2HV-2139 NSCW from Reac. Cavity Cooler 73 73 Close 1HV-5118 CST to MDAFW Pump Suction 24 24 Open 2HV-5118 CST to MDAFW Pump Suction 24 24 Open 1HV-5119 CST to MDAFW Pump Suction 24 24 Open 2HV-5119 CST to MDAFW Pump Suction 24 24 Open 1

O i

4 6-5 4

~~ ~-

l

Calculated Margin V

The opening margins for 1/2HV-1806,1/2HV-1807,1/2HV-1808,1/2HV-1809, 1/2HV-1822,1/2HV-1823,1/2HV-1830 and 1/2HV-1831 were determined based on a design-basis differential pressure of 70 psid or 74 psid which is associated with the safety function of opening on an SI signal.

The opening margins for valves 1/2HV-2134,1/2HV-2135,1/2HV-2138 and 1/2HV-2139 were determined based on a design-basis differential pressure of 70 psid or 73 psid which is associated with opening to recover from mispositioning.

These valves do not have an active safety function to open.

The opening margins for valves 1/2HV-5118 and 1/2HV-5119 were determined based on a design-basis differential pressure of 24 psid which is associated with the safety function of opening to provide a suction flowpath from CST 2 to the motor-driven AFW pumps.

O I

6-6 1

O Openinn Capability Marcins

~~

2HV-5119 129 IHV-Sil9 "1

2HV-5118 gamus eammagumummma129 IHV-5118 "1

2HV-2139

- 82 IHV-2139 _ m 82 2HV-2138 m 69 IHV-2138 m 69 211V-2135 "m 82 1ilV-2135 "- 82 2HV-2134

- 69 IHV-2134 m 69 2HV-1831,- 109 1IIV-1831 O

,mangungangungamme109 2HV-1830 _-96 IHV-1830,m96 211V-1823,m 109 1

ilIV-1823 _m l09 211V-1822 _m90 lHV-1822

-91 2HV-1809 111V-1809 _m09 109 211V-1808 _m91 1HV-1808 _m91 2ilV-1807 109 liiV-1807 109 211V-1806

-91 IHV 1866 9) 0 50 100 150 200 250 300 Margin %

6-7

i i

l The closing margins for l\\2HV-1806,1/2HV-1807,1/2HV-1808,1/2HV-1809, l

1/2HV-1822,1/2HV-1823,1/2HV-1830 and 1/2HV-1831 were determined based on a design-basis differential pressure of 70 psid or 74 psid which is associated with the safety function of closing to provide containment isolation.

The closing margins for valves 1/2HV-2134,1/2HV-2135,1/2HV-2138 and 1/2HV-2139 were determined based on a design-basis differential pressure of 70 psid or 73 psid which is associated with the safety function ofclosing on an SI signal or loss ofoffsite power.

The closing margins for valves 1/2HV-5118 and 1/2HV-5119 were determined based on a design-basis differential pressure of 24 psid which is associated with closing to recover from mispositioning. These valves do not have an active sa function to close.

I O

t O

l l

6-8

O Closina Canability Marvinn 2ilV-Sil9

'a:

Il!V-Sil9 m

2HV-Sil8 186 IIIV-5118 m

2HV-2139,, - 105 IHV-2139 _- los 2HV-2138

- 110 IHV-2138

- 110 2HV-2135 105

~

IHV-2135,, - 105 SHV-2134 _- 110 IHV-2134

- 110 2HV-1831 _- - 110 IHV-1831

- 110 2HV-1830

- 110 IHV-1830,- 110 2HV-1823

- 110 lHV 1823

- 110 211V-1822,, - 104 IIIV-1822

- 104 2HV-1809 __ - 110 1IIV-1809

- 110 2tiV-1808

- 104 IHV-1808 - 104 2ilV-1807 - 110 tilV-1807 - 110 2HV-1806 - 104 IIIV-18%

104 0

50 100 150 200 250 300 Margin %

O 6-9

-.=

f l

Desion-Basis Canability Justification O

1. Valves IHV-1823, IHV-1831,2HV-2135 and 2HV-2139 were differential pressure tested in-situ at VEGP and their performance was consistent with that predicted by the Fisher methodology. The actual dynamic opening torques were 62% to 105% of the predicted values and the actual closing torques were 96% to 105% of the predicted values.

2. Based on conservative calculations of valve torque requirements and operator capabilities these valves have an opening margin of at least 69% and a closing j

margin of at least 104%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

6-10

O 6.3 Fisher Group FB-3 Butterfly Valves b

Descriotion This group is composed of ten,10 inch,150 lb, Fisher butterfly valves. Valves 1/211V-1974,1/2HV-1975,1/2HV-1978 and 1/2HV-1979 are normally open to provide Auxiliary Component Cooling Water (ACCW) to the RCP thermal barriers, the excess letdown heat exchangers and the reactor coolant drain tank heat exchangers. The valves have a safety function to close to provide containment isolation. Valves 1/2HV-5113 are normally closed and have a safety function to open on a decreasing level in CST 001 to provide a suction flow path from CST 002 to the turbine-driven AFW pumps. The torque requirements for these valves were calculated utilizing proprietary Fisher methodology with packing loads derived from an EPRI NMAC equation.

Table 6-4 Fisher Group FB-3 Butterfly Valves Valve Tag Valve Description Design Design Safety ML M

E Position 02:n Close Onen/Close 1HV-1974 ACCW from RCP Coolers 95 95 Close 211V-1974 ACCW from RCP Coolers 95 95 Close 1HV-1975 ACCW from RCP Coolers 96 96 Close 2HV-1975 ACCW from RCP Coolers 96 96 Close 1HV-1978 ACCW to RCP Coolers 95 95 Close 2HV-1978 ACCW to RCP Coolers 95 95 Close 1HV-1979 ACCW to RCP Coolers 96 96 Close 2HV-1979 ACCW to RCP Coolers 96 96 Close 1HV-5113 CST to TDAFW Pump Suction 23 23 Open 2HV-5113 CST to TDAFW Pump Suction 23 23 Open Differential Pressure Test Status These valves have a differential pressure test priority of 4 in the opening direction and 4 in the closing direction. The VEGP program only requires that Fisher butterfly valves with a differential pressure test priority of 5 or higher be differential pressure tested, therefore, these valves were not tested.

G 6-11

0 Calculated Margin The opening margins for valves 1/2HV-1974,1/2HV-1975,1/2HV-1978 and 1/2HV-1979 were determined based on a design-basis differential pressure of 95 psid or 96 psid which is associated with opening to recover from mispositioning.

These valves do not have an active safety function to open.

The opening margins for valves 1/2HV-5113 were determined based on a design-basis differential pressure of 23 psid which is associated with the safety function of opening to provide a suction flowpath from CST 2 to the turbine-driven AFW pump.

Openine Capability Marains 211V-5113 80 llIV-5113 80 2ilV-1979 697 IflV-1979 97 211V-1978 98 tilV-1978 98 211V-1975 97 tilV-1975 -97 2ilV-1974 698 tilV-1974 id 0

50 100 150 200 Margin %

The closing margins for valves 1/2HV-1974,1/2HV-1975,1/2HV-1978 and 1/2HVl979 were determined based on a design-basis differential pressure of 95 psid or 96 psid which is associated with the safety function of closing to provide containment isolation.

The closing margins for valves 1/2HV-5113 were determined based on a design-basis differential pressure of 23 psid which is associated with closing to recover from mispositioning. These valves do not have an active safety function to close.

O 6-12

i i

Closing Capability Marainx 211V-SII3 m80 llIV-Sil3 80 211V-1979 97 IIIV-1979 m97 211V-1978

~ 98 tilV-1978 98 211V-1975 97 IIIV-1975 97 211V-1974 98 tilV-1974 98 0

50 100 150 200 Margin %

Design-Basis Canability Justification

1. Valves 1HV-1823, IHV-1831,2HV-2135 and 2HV-2139 are 8 inch,150 lb O

Fisher butterfly valves similar in design to the valves in group FB-3. These valves were differential pressure tested in-situ at VEGP and their performance was consistent with that predicted by the Fisher methodology. The actual dynamic opening torques were 62% to 105% of the predicted values and the actual closing torques were 96% to 105% of the predicted values.

2. Based on conservative calculations of valve torque requirements and operator capabilities these valves have an opening margin of at least 80% and a closing margin of at least 80%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

i O

6-13

~-

1

~

O 6.4 Fisher Group FB-4 Butterfly Valves Description l

This group is composed of sixteen,18 inch,150 lb, Fisher butterfly valves. Valves 1/2HV-11600,1/2HV-11605,1/2HV-11606,1/2HV-11607,1/2HV 11612 and 1/2HV-11613 are normally open when their respective NSCW pump is running and are normally closed when their respective NSCW pump is not running. The valves have a safety function to open 45 seconds following the start of an NSCW l

pump. Valves 1/2HV-1668B and 1/2HV-1669B are normally closed and have a safety function to open on low NSCW return water temperature to divert flow to the tower basins. The valves have a safety function to open on increasing NSCW return water temperature to direct flow to the towers. The torque requirements for these valves were calculated utilizing proprietary Fisher methodology with packing loads derived from an EPRI NMAC equation.

Table 6-5 Fisher Group FB-4 Butterfly Valves Valve Tag Valve Description Design Design Safety E

E Position QDen Close Onen/Close 1HV-11600 NSCW Pump Discharge 173 0

Open 2HV-11600 NSCW Pump Discharge 173 0

Open 1HV-11605 NSCW Pump Discharge 173 0

Open 2HV-11605 NSCW Pump Discharge 173 0

Open 1HV-11606 NSCW Pump Discharge 173 0

Open 2HV-11606 NSCW Pump Discharge 173 0

Open IHV-11607 NSCW Pump Discharge 173 0

Open 2HV-11607 NSCW Pump Discharge 173 0

Open 1HV-11612 NSCW Pump Discharge 173 0

Open 2HV-11612 NSCW Pump Discharge 173 0

Open 1HV-11613 NSCW Pump Discharge 173 0

Open 2HV-11613 NSCW Pump Discharge 173 0

Open 1HV-1668B NSCW Tower Bypass 31 31 Open/Close 1HV-1668B NSCW Tower Bypass 31 31 Open/Close IHV-1669B NSCW Tower Bypass 31 31 Open/Ciose 1HV-16698 NSCW Tower Bypass 31 31 Open/Close O

6-14

DifTerential Pressure Test Status These valves have a differential pressure test priority of 4 in the opening direction and 4 in the closing direction. The VEGP program only requires that Fisher butterfly valves with a differential pressure test priority of 5 or higher be differential pressure tested, therefore, these valves were not tested.

Calculated Margin The opening margins for valves 1/2HV-11600,1/2HV-11605,1/2HV-11606, 1/2HV-11607,1/2HV-11612 and 1/2HV-11613 were determined based on a design-basis differential pressure of 173 psid which is associated with the safety function of opening following the start of an NSCW pump.

The opening margins for valves 1/2HV-1668B and 1/2HV-1669B were determined based on a design-basis differential pressure of 31 psid which is associated with the safety function of opening on low NSCW return water temperature.

Opening Capability Margins 2ily-1669B ]

198 111%1669B 198 211V-1668B 198 Il1V-1668B 198 2ilV-ll613 "m26 tilV Il613 m26 2flV-Il612 26 tily-11612 "m26 211V-11607 "m26 IllV-Il607 "m26 211V-11606 26 111 % 11606 "m26 211%I1605 m26 2ilV-11605 26

~~

211V-11600 m26 111 % 11600 "m26 0

50 100 150 200 Margin %

6-15

The closing margins for valves 1/2HV-11600,1/2HV-11605,1/2HV-11606, 1/2HV-11607,1/2HV-11612 and 1/2HV-11613 were determined based on a design-basis differential pressure of 0 psid which is associated with closing following a pump trip. These valves do not have an active safety function to close.

The closing margins for valves 1/2HV-1668B and 1/2HV-1669B were determined based on a design-basis differential pressure of 31 psid which is associated with the safety function of closing on high NSCW return water temperature.

Closina Capability Marvins 2ilV-1669B 265 tilV-1669B 265

~~

2flV-16688 265

~

IIIV-1668B m 265 2ilV-Il613 529

~~

IIIV-Il613 529 2ilV-Il612 tilV-Il612 529

~~

2ilV-Il607 529 529 tilV-Il607

~~

211V-II606 529 tilV-Il606 529 2ilV-11605

~

529 211V-11605 529 211V-11600

~~

tilV-Il600 l

l l

l l

l 0

100 200 300 400 500 600 Margin %

Design-Basis Canability Justification

1. Valves 1HV-1823, IllV-1831,2HV-2135 and 2HV-2139 are 8 inch,150 lb Fisher butterfly valves similar in design to the valves in group FB-4. These valves were differential pressure tested in-situ at VEGP and their performance O

was consistent with that predicted by the Fisher methodology. The actual 6-16

(Q dynamic opening torques were 62% to 105% of the predicted values and the

/

actual closing torques were 96% to 105% of the predicted values.

2. Based on conservative calculations of valve torque requirements and operator capabilities valves 1/2HV-1668B and 1/2HV-1669B have an opening margin of i

198% and 'a closing margin of 265%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

3. Based on conservative calculations of valve torque requirements and operator capabilities valves 1/2HV-Il600,1/2HV-11605,1/2HV-11606,1/2HV-Il607, 1/2HV-11612 and 1/2HV-11613 have an opening margin of 26% and a closing margin of 529%. In addition, these valves are stroked open at design-basis

]

conditions each time an NSCW pump is started. Therefore, these margins, combined with the fact that the valves are stroked against design-basis conditions i

in normal operation, are adequate to ensure that these valves will be capable of performing their design-basis function.

l l

b f

O 6-17

1 6.5 Fisher Group FB-5A Butterfly Valves Description This group is composed of eight,24 inch,150 lb, Fisher butterfly valves equipped with 2 inch valve stems. These valves are normally closed and power is locked out to prevent operation in modes I through 4. The valves receive a close signal on a containment isolation signal. The torque requirements for these valves were calculated utilizing proprietary Fisher methodology with packing loads derived from an EPRI NMAC equation.

Table 6-6 Fisher Group FB-5A Butterfly Valves Valve Tag Valve Description Design Design Safety No.

DP DP Position Open Close Open/Close j

lHV-2626A Normal Purge Supply 0

0 Close 2HV-2626A Normal Purge Supply 0

0 Close 1HV-2627A Normal Purge Supply 0

0 Close O

2HV-2627A Normal Purge Supply 0

0 Close V

IHV-2628A Normal Purge Exhaust 0

0 Close 2HV-2628A Normal Purge Exhaust 0

0 Close IHV-2629A Normal Purge Exhaust 0

0 Close 2HV-2629A Normal Purge Exhaust 0

0 Close Differential Pressure Test Status These valves have a differential pressure test priority of 2 in the opening direction and 2 in the closing direction. The VEGP program only requires that Fisher butterfly valves with a differential pressure test priority of 5 or higher be differential pressure tested, therefore, these valves were not tested.

Calculated Margin The opening margins for these valves were determined based on a design-basis differential pressure of 0 psid. These valves do not have an active safety function to open.

j 4

6-18

i d

Opening Capability Margins j

2ilV-2629A 245 I

IIIV-2629A we t

j 2ilV-2628A 164 l

lilV-2628A 164 5

211V-2627A 235 tilV-2627A 215 1

j 211V-2626A 164 l

lilV-2626A 164 1

l 0

50 100 150 200 250 300 Margin %

1

}

The closing margins for these valves were determined based on a design-basis j

differential pressure of 0 psid which is associated with the safety function of i

closing to provide containment isolation in modes 5 and 6. The valves are closed and power is locked out to prevent operation in modes 1 through 4.

l Closing Capability Margins I

j 211V-2629A un

]

IIIV-2629A un l

211V-2628A 296 l

11IV-2628A 296

{

211V-2627A un i

tilV-2627A un 211V-2626A 296 tilV-2626A w

J 0

50 100 150 200 250 300 350 400 l

Margin %

i i

Desien-Basis Canability Justification

1. Valves llIV-1823, ll1V-1831,2HV-2135 and 2HV-2139 are 8 inch,150 lb

]

Fisher butterfly valves similar in design to the valves in group FB-5A. These i

valves were differential pressure tested in-situ at VEGP and their performance was consistent with that predicted by the Fisher methodology. The actual i

6-19

i dynamic opening torques were 62% to 105% of the predicted values and the actual closing torques were 96% to 105% of the predicted values.

2. Based on conservative calculations of valve torque requirements and operator capabilities these valves have an opening margin of at least 164% and a closing margin of at least 296%. These margins are adequate to ensure that these valves 4

will be capable of performing their design-basis function.

f O

)

6-20

1 i

6.6 Fisher Group FB-5B Butterftv Valves Description This group is composed of four,24 inch,150 lb, Fisher butterfly valves equipped with 2-1/2 inch stems. These valves are normally open to direct NSCW return water to the cooling towers. The valves have a safety function to close on decreasing NSCW return water temperature and to open on increasing NSCW return water temperature. The torque requirements for these valves were calculated utilizing proprietary Fisher methodology with packing loads derived from an EPRI NMAC equation.

Table 6-7 Fisher Group FB-5B Butterfly Valves Valve Tag Valve Description Design Design Safety No.

DP DP Position Open Close Open/Close 1HV-1668A NSCW Tower Isolation 31 31 Open/Close 2HV-1668A NSCW Tower Isolation 31 31 Open/Close

(]./

/

IHV-1669A NSCW Tower Isolation 31 31 Open/Close 2HV-1669'A NSCW Tower Isolation 31 31 Open/Close Differential Pressure Test Status These valves have a differential pressure test priority of 4 in the opening direction and 4 in the closing direction. The VEGP program only requires that Fisher butterfly valves with a differential pressure test priority of 5 or higher be differential pressure tested, therefore, these valves were not tested.

Calculated Margin The opening margins for these valves were determined based on a design-basis differential pressure of 31 psid which is associated with the safety function of opening on increasing NSCW return water temperature.

A 6-21

l 1

Opening Capability Marginn 2HV-1669A o

IliV-1669A 252 211V-1668A po tilV-1668A p<,

0 50 100 150 200 250 300 l

Margin %

The closing margins for these valves were determined based on a design-basis differential pressure of 31 psid which is associated with the safety function of closing on decreasing NSCW return water temperature.

Closing Capability Margins 211V-1669A aw filV-1669A 299 211V-1668A w

ll1V-1668A aw O

50 100 150 200 250 300 O

Margin %

Design-Basis Canability Justification

1. Valves 1HV-1823, IHV-1831,2HV-2135 and 2HV-2139 are 8 inch,150 lb Fisher butterfly valves similar in design to the valves in group FB-5B. These valves were differential pressure tested in-situ at VEGP and their performance was consistent with that predicted by the Fisher methodology. The actual dynamic opening torques were 62% to 105% of the predicted values and the actual closing torques were 96% to 105% of the predicted values.

2. Based on conservative calculations of valve torque requirements and operator capabilities these valves have an opening margin of at least 244% and a closing margin of 299%. These margins are adequate to ensure that these valves will be capable of performing their design-basis function.

6-22

.