ML21350A362
| ML21350A362 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 12/15/2021 |
| From: | Mark D. Sartain Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 21-247 | |
| Download: ML21350A362 (17) | |
Text
VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261
December 15, 2021
United States Nuclear Regulatory Commission Serial No.: 21-247 Attention: Document Control Desk NRA/GDM: RO Washington, D.C. 20555-0001 Docket Nos.: 50-280/281 50-338/339 License Nos.: DPR-32/37 NPF-4/7
VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 SURRY POWER STATIONS UNITS 1 AND 2 UPDATED ANCHOR DARLING DOUBLE DISC GATE VALVE INFORMATION
References:
- 1) Letter from Virginia Electric and Power Company and Dominion Nuclear Connecticut, Inc., to the US NRG dated December 18, 2017 (Serial No. 17-343A), for Millstone Power Station Units 2 and 3, North Anna and Surry Power Stations Units 1 and 2, "Anchor Darling Double Disc Gate Valve Information and Status" [ADAMS Accession No.
ML17362A043]
- 2) Letter from Virginia Electric and Power Company and Dominion Nuclear Connecticut, Inc., to the US NRG dated December 19, 2018 (Serial No.18-238), "Virginia Electric and Power Company (Dominion Energy Virginia), Dominion Energy Nuclear Connecticut, Inc., Millstone Power Station Unit 2, North Anna and Surry Power Stations Units 1 and 2, Updated Anchor Darling Double Disc Gate Valve Information and Repair Status" [ADAMS Accession No. ML18361A580]
- 3) Letter from Virginia Electric and Power Company, Dominion Energy Nuclear Connecticut, Inc., and Dominion Energy South Carolina, Inc.,
to the US NRG dated July 20, 2020, "Virginia Electric and Power Company (Dominion Energy Virginia) Dominion Energy Nuclear Connecticut, Inc. (DENG) Dominion Energy South Carolina, Inc.
(DESC), Millstone Power Station Unit 2, North Anna and Surry Power Stations Units 1 and 2, Virgil C. Summer Nuclear Station Unit 1, Updated Anchor Darling Double Disc Gate Valve Information and Status" [ADAMS Accession No. ML20203M160]
- 4) Part 21 Notification from Flowserve Corporation, "Part 21 - Wedge Pin Failure in Anchor Darling Motor Operated Double Disc Gate Valves Serial No.21-247 Docket Nos. 50-280/281/338/339 Updated ADDDGV Information and Status Page 2 of 5
with Threaded Stem to Upper Wedge Connections," dated March 1, 2013, as modified July 11, 2017 [ADAMS Accession No.
ML17194A825]
- 5) Boiling Water Reactor Owners Group (BWROG) Topical Report TP 1-112, Revision 4, "Recommendations to Resolve Flowserve 10 CFR Part 21 Notification Affecting Anchor Darling Double Disc Gate Valve Wedge Pin Failure," [ADAMS Accession No. ML17243A137]
- 6) BWROG Topical Report TP-16-1-112, Revision 5, "Recommendations to Resolve Flowserve 10 CFR Part 21 Notification Affecting Anchor Darling Double Disc Gate Valve Wedge Pin Failure," November 2019
In References 1 through 3, Virginia Electric and Power Company (Dominion Energy Virginia) provided a listing of the Anchor Darling double disc gate valve (ADDDGV) population with active safety functions for North Anna and Surry Power Stations (NAPS and SPS, respectively) Units 1 and 2 that are subject to the Flowserve Part 21 (Reference 5). References 1 through 3 included relevant information for each valve listed pursuant to the recommendations provided in Reference 5 and as updated in Reference 6.
Subsequent to the submittal of these letters, a self-assessment of the Dominion Energy Virginia ADDDGVs analysis was performed, and it was determined that where maximum measured values for torque were utilized, the pin shear analysis did not subtract measured running thrust from the total applied thrust when determining the maximum required coefficient of friction (COF). Consequently, thrust measured in the running region resulting from packing friction would not be applied to the stem-to-wedge threads, and therefore would not assist in absorbing excess torque applied to the pin. After reviewing the COF analysis and performing additional benchmarking, Dominion Energy Virginia performed another calculation that conservatively addressed this issue and identified the maximum required COF that should be applied to the NAPS and SPS Units 1 and 2 ADDDGVs that have yet to be repaired.
Re-evaluation of the maximum applied wedge thread COF resulted in the recategorization of certain NAPS and SPS ADDDGVs from "not susceptible" to "susceptible" per Reference 6. These MOVs and their revised required COF values are listed in Table 1.
Serial No.21-247 Docket Nos. 50-280/281/338/339 Updated ADDDGV Information and Status Page 3 of 5
TABLE 1 - Susceptible ADDDGVs Based on Revised Required COF
Valve No. Valve Function Revised Required COF Value
1-RH-MOV-1720B Residual Heat Removal to "C" RCS Loop 0.274
1-SI-MOV-1890B Low Head Safety Injection Hot Leg Injection Valve 0.230
2-SI-MOV-2890B Low Head Safety Injection Hot Leg Injection Valve 0.213
2-SI-MOV-2890C Low Head Safety Injection Cold Leg Injection Valve 0.216
Valve No. Valve Function Revised Required COFValue
2-RH-MOV-2720A Accumulator Discharge Line Residual Heat Removal Outlet Isolation to 0.183
2-RH-MOV-27208 Residual Heat Removal Outlet Isolation to 0.179 Accumulator Discharge Line
Attachments 2 and 3 of Reference 3 included station-specific tables of valve information, susceptibility (including repair status) and the planned corrective actions for the ADDDGVs subject to the Flowserve Part 21 at NAPS and SPS, respectively. These two tables have been updated to reflect the change in susceptibility for the six MOVs discussed above, as well as the testing/repair status of each station's ADDDGV population. The SPS table was also corrected to address an administrative table alignment error between the valve mark numbers and their associated system and functional descriptions contained in Reference 3. The updated NAPS and SPS ADDDGV tables are provided in Attachments 1 and 2, respectively.
The four NAPS MOVs categorized as "susceptible" will be repaired consistent with the RFO repair schedules recommended in Reference 6. The Reference 6 recommended repair schedule for the two SPS MOVs recategorized as "susceptible" would be the completion of the SPS Unit 2 spring 2023 RFO. However, these MOVs are currently scheduled to be repaired during the fall 2024 SPS Unit 2 RFO based on their previous "not susceptible" categorization. This repair schedule remains acceptable due to the high level of confidence that no pin shear has occurred based on completed NAPS and SPS wedge pin inspections, stem rotation checks, and calculated COFs of.'.5. 0.27 4 for Serial No.21-247 Docket Nos. 50-280/281/338/339 Updated ADDDGV Information and Status Page 4 of 5
the NAPS MOVs and ~ 0.183 for the Surry MOVs. Stem rotation checks will continue to be performed for these MOVs until their wedge pins have been replaced.
Should you have any questions or require additional information, please contact Mr. Gary D. Miller at (804) 273-2771.
Respectfully,
Mark D. Sartain Vice President - Nuclear Engineering and Fleet Support
Regulatory commitments contained in this correspondence: None
Attachments:
- 1. Updated Anchor Darling Double Disc Gate Valve Susceptibility Information - North Anna Power Station Units 1 and 2
- 2. Updated Anchor Darling Double Disc Gate Valve Susceptibility Information - Surry Power Station Units 1 and 2 Serial No.21-247 Docket Nos. 50-280/281/338/339 Updated ADDDGV Information and Status Page 5 of 5
cc: U.S. Nuclear Regulatory Commission - Region II Marquis One Tower 245 Peachtree Center Ave., NE Suite 1200 Atlanta, Georgia 30303-1257
NRC Senior Resident Inspector Surry Power Station
Mr. L. John Klos NRC Project Manager U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 09 E3 11555 Rockville Pike Rockville, MD 20852-2738
Mr. G. Edward Miller NRC Senior Project Manager U.S. Nuclear Regulatory Commission One White Flint North Mail Stop 09 E3 11555 Rockville Pike Rockville, Maryland 20852-2738 Serial No.21-247 Docket Nos. 50-338/339
Attachment 1
UPDATED ANCHOR DARLING DOUBLE DISC GATE VALVE SUSCEPTIBILITY INFORMATION
Virginia Electric and Power Company (Dominion Energy Virginia)
North Anna Power Station Units 1 and 2 Serial No.21-247 Docket Nos. 50-338/339 Updated NAPS ADDDGV Susceptibility Information Attachment 1
North Anna Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Result of Required Plant System Description (inches) Function Ranking Evaluation Coefficient Valve Functional Valve Size Active Safety Expert Panel Risk Susceptibility Name Unit Valve ID (TP16-1-112 RS) of Friction Planned Corrective Actions (Open, (High, Medium, (Susceptible or Close, Both) Low) Not Susceptible)
1-RH-MOV-Residual Residual Heat Not Susceptible Perform stem rotation checks in conjunction with NAPS 1 1720A Heat Removal to RCS 10x8xl0 Open Medium (Repaired) NIA established GL 96-05 periodic diagnostic testing Removal Cold Leg requirements
1-RH-MOV-Residual Residual Heat Internal valve repair within 2 years; OR perform NAPS 1 1720B Heat Removal to RCS 10x8xl0 Open Medium Susceptible 0.274 diagnostic testing every 2 years until internal valve Removal Cold Leg repair within 2 RFOs ( 4 years)
1-SI-MOV-Safety Low Head Safety Not Susceptible Perform stem rotation checks in conjunction with NAPS I 1890A Injection Injection Hot Leg 10x8xl0 Both Low (Repaired) NIA established GL 96-05 periodic diagnostic testing Injection Valve requirements
NAPS 1 1890B 1-SI-MOV-Safety Low Head Safety Internal valve repair within 2 years; OR perform Injection Injection Hot Leg 10x8xl0 Both Low Susceptible 0.230 diagnostic testing every 2 years until internal Injection Valve valve repair within 3 RFOs (6 years)
NAPS I 1890C 1-SI-MOV-Safety Low Head Safety Not Susceptible Perform stem rotation checks in conjunction with Injection Cold Leg 10x8xl0 Both Low NIA established GL 96-05 periodic diagnostic testing Injection Injection Valve (Repaired) requirements
Page 1 of 3 Serial No.21-247 Docket Nos. 50-338/339 Updated NAPS ADDDGV Susceptibility Information Attachment 1
North Anna Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Result of Required Plant System Description (inches) Function Ranking Evaluation Coefficient Valve Functional Valve Size Active Safety Expert Panel Risk Susceptibility Name Unit Valve ID (TP16-1-112 R5) of Friction Planned Corrective Actions (Open, (High, Medium, (Susceptible or Close, Both) Low) Not Susceptible)
NAPS 1 1890D 1-SI-MOV-Safety Low Head Safety Not Susceptible Perform stem rotation checks in conjunction with Injection Cold Leg 10x8x10 Both Low NIA established GL 96-05 periodic diagnostic testing Injection Injection Valve (Repaired) requirements
2-RH-MOV-Residual Residual Heat Not Susceptible Perform stem rotation checks in conjunction with NAPS 2 2720A Heat Removal to "B" 10x8x10 Open Medium (Repaired) NIA established GL 96-05 periodic diagnostic testing Removal RCS Loop requirements
2-RH-MOV-Residual Residual Heat Not Susceptible Perform stem rotation checks in conjunction with NAPS 2 2720B Heat Removal to "C" 10x8x10 Open Medium NIA established GL 96-05 periodic diagnostic testing Removal RCS Loop (Repaired) requirements
NAPS 2 2890A 2-SI-MOV-Safety Low Head Safety Not Susceptible Perform stem rotation checks in conjunction with Injection Injection Hot Leg 10x8xl0 Both Low (Repaired) NIA established GL 96-05 periodic diagnostic testing Injection Valve requirements
NAPS 2 2890B 2-SI-MOV-Safety Low Head Safety Internal valve repair within 2 years; OR perform Injection Hot Leg 10x8x10 Both Low Susceptible 0.213 diagnostic testing every 2 years until internal Injection Injection Valve valve repair within 3 RFOs (6 years)
Page 2 of 3 Serial No.21-247 Docket Nos. 50-338/339 Updated NAPS ADDDGV Susceptibility Information Attachment 1
North Anna Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Result of Required Plant System Description (inches) Function Ranking Evaluation Coefficient Valve Functional Valve Size Active Safety Expert Panel Risk Susceptibility Name Unit Valve ID (TP16-l-112 R5) of Friction Planned Corrective Actions (Open, (High, Medium, (Susceptible or Close, Both) Low) Not Susceptible)
NAPS 2 2890C 2-SI-MOV-Safety Low Head Safety Internal valve repair within 2 years; OR perform Injection Cold Leg 10x8xl0 Both Low Susceptible 0.216 diagnostic testing every 2 years until internal Injection Injection Valve valve repair within 3 RFOs (6 years)
Perform compensatory diagnostic testing and NAPS 2 2890D 2-SI-MOV-Safety Low Head Safety Not Susceptible stem rotation checks (i.e., tests 1 & 2 every 2 Injection Injection Cold Leg 10x8xl0 Both Low (COF < 0.2) 0.193 years; tests 3 & 4 every 4 years; test 5 and after Injection Valve may be performed at the established GL 96-05 periodic test interval)
Page 3 of 3 Serial No.21-247 Docket Nos. 50-280/281
Attachment 2
UPDATED ANCHOR DARLING DOUBLE DISC GATE VALVE SUSCEPTIBILITY INFORMATION
Virginia Electric and Power Company
{Dominion Energy Virginia)
Surry Power Station Units 1 and 2 Serial No.21-247 Docket Nos. 50-280/281 Updated SPS ADDDGV Susceptibility Information Attachment 2
Surry Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Plant Valve Active Safety Expert Panel Result of Susceptibility Required Name Unit Valve ID System Valve Functional Size Function Risk Ranking Evaluation Coefficient of Description (inches) (TP16-1-112 RS) Friction (Open, Medium, (Susceptible or (High, Planned Corrective Actions Close, Both) Low) not Susceptible)
SPS 1 Charging 01-CH-Main Charging Not Susceptible Perform compensatory diagnostic testing and stem 3 Close Low 0.095 rotation checks (i.e., tests 1 & 2 every 2 years; tests 3 MOV-1289A Header Isolation (COF < 0.1) & 4 every 4 years; test 5 and after may be performed at the established GL 96-05 periodic test interval).
Perform compensatory diagnostic testing and stem SPS 1 01-CH-Charging Main Charging 3 Close Low Not Susceptible 0.095 rotation checks (i.e., tests 1 & 2 every 2 years; tests 3 MOV-1289B Header Isolation (COF < 0.1) & 4 every 4 years; test 5 and after may be performed at the established GL 96-05 periodic test interval).
Charging Pump to Perform stem rotation checks in conjunction with SPS 1 01-CH-Charging Seal Water 3 Both Low Not Susceptible NIA established GL 96-05 periodic diagnostic testing MOV-1370 Recirculation (Repaired) requirements.
Isolation
Charging Pump Perform compensatory diagnostic testing and stem SPS 1 MOV-1373 Charging 01-CH-Discharge Not Susceptible rotation checks (i.e., tests 1 & 2 every 2 years; tests Recirculation 3 Both Low (COF < 0.2) 0.118 3 & 4 every 4 years; test 5 and after may be Isolation performed at the established GL 96-05 periodic test interval).
Residual Heat 01-RH-Residual Removal Outlet Not Susceptible Perform stem rotation checks in conjunction with SPS 1 MOV-1720A Heat Isolation to 10x8xl0 Both Medium (Repaired) NIA established GL 96-05 periodic diagnostic testing Removal Accumulator requirements.
Discharge Line
Page 1 of 7 Serial No.21-247 Docket Nos. 50-280/281 Updated SPS ADDDGV Susceptibility Information Attachment 2
Surry Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Plant Unit Valve ID System Valve Active Safety Expert Panel Result of Susceptibility Required Name Valve Functional Size Evaluation Coefficient of Description (inches) Function Risk Ranking (TP16-1-112 R5) Friction (Open, Medium, (Susceptible or (High, Planned Corrective Actions Close, Both) Low) not Susceptible)
Residual Heat 01-RH-Residual Removal Outlet Not Susceptible Perform stem rotation checks in conjunction with SPS 1 MOV-1720B Heat Isolation to 10x8x10 Both Medium (COF < 0.1) 0.044 established GL 96-05 periodic diagnostic testing Removal Accumulator requirements.
Discharge Line
Low Head Safety 01-SI-MOV-Safety Injection Pump Not Susceptible Perform stem rotation checks in conjunction with SPS 1 1864A Injection Cold Leg 10 Open Low (Repaired) NIA established GL 96-05 periodic diagnostic testing Discharge Stop requirements.
Valve
Low Head Safety 01-SI-MOV-Safety Injection Pump Not Susceptible Perform stem rotation checks in conjunction with SPS 1 1864B Injection Cold Leg 10 Open Low (Repaired) NIA established GL 96-05 periodic diagnostic testing Discharge Stop requirements.
Valve
High Head Safety Perform stem rotation checks in conjunction with SPS 1 01-SI-MOV-Safety Injection to Reactor 3 Both High Not Susceptible NIA established GL 96-05 periodic diagnostic testing 1867C Injection Coolant System (Repaired) requirements.
Cold Legs
Page 2 of 7 Serial No.21-247 Docket Nos. 50-280/281 Updated SPS ADDDGV Susceptibility Information Attachment 2
Surry Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Plant Valve Active Safety Expert Panel Result of Susceptibility Required Name Unit Valve ID System Valve Functional Size Evaluation Coefficient of Function Risk Ranking Description (inches) (TP16-1-112 RS) Friction
(Open, (High, Planned Corrective Actions Medium, (Susceptible or Close, Both) Low) not Susceptible)
01-SI-MOV-Safety High Head Safety Not Susceptible Perform stem rotation checks in conjunction with SPS 1 1867D Injection Injection to RCS 3 Both High NIA established GL 96-05 periodic diagnostic testing Cold Legs (Repaired) requirements.
High Head Safety Perform stem rotation checks in conjunction with SPS 1 01-SI-MOV-Safety Injection from Not Susceptible 1869A Injection Charging Header to 3 Both Low NIA established GL 96-05 periodic diagnostic testing (Repaired) requirements.
RCS Hot
Low Head Safety Perform stem rotation checks in conjunction with SPS 1 01-SI-MOV-Safety Injection Pump Hot Not Susceptible 1890A Injection Leg Discharge Stop 10x8x10 Both Low NIA established GL 96-05 periodic diagnostic testing (Repaired) requirements.
Valve
Low Head Safety Perform compensatory diagnostic testing and stem SPS 1 01-SI-MOV-Safety Injection Pump Hot Not Susceptible rotation checks (i.e., tests l & 2 every 2 years; tests 1890B Injection Leg Discharge Stop 10x8xl0 Both Low 0.070 3 & 4 every 4 years; test 5 and after may be (COF < 0.1) performed at the established GL 96-05 periodic Valve test interval).
Low Head Safety SPS 1 01-SI-MOV-Safety Injection Pump Hot 10x8xl0 Not Susceptible Perform stem rotation checks in conjunction with 1890C Injection Leg Discharge Stop Both Low (Repaired) NIA established GL 96-05 periodic diagnostic testing Valve requirements.
Page 3 of 7 Serial No.21-247 Docket Nos. 50-280/281 Updated SPS ADDDGV Susceptibility Information Attachment 2
Surry Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Plant Unit Valve ID System Valve Active Safety Expert Panel Result of Susceptibility Required Name Valve Functional Size Evaluation Coefficient of Description (inches) Function Risk Ranking (TP16-1-112 RS) Friction (Open, Medium, (Susceptible or (High, Planned Corrective Actions Close, Both) Low) not Susceptible)
02-CH-Charging Pump Not Susceptible Perform stem rotation checks in conjunction with SPS 2 MOV-2115B Charging Supply from 8 Both High (Repaired) NIA established GL 96-05 periodic diagnostic testing RWST requirements.
02-CH-Charging Pump Not Susceptible Perform stem rotation checks in conjunction with SPS 2 MOV-2115D Charging Supply from 8 Both High (Repaired) NIA established GL 96-05 periodic diagnostic testing RWST requirements.
Perform compensatory diagnostic testing and stem SPS 2 Charging 02-CH-Main Charging Not Susceptible rotation checks (i.e., tests 1 & 2 every 2 years; tests 3 Close Low 0.201 3 & 4 every 4 years; test 5 and after may be MOV-2289A Header Isolation (Valve DIA< 6 inches) performed at the established GL 96-05 periodic test interval).
Perform compensatory diagnostic testing and stem SPS 2 MOV-2289B Charging 02-CH-Main Charging Not Susceptible rotation checks (i.e., tests 1 & 2 every 2 years; tests Header Isolation 3 Close Low (Valve DIA< 6 inches) 0.201 3 & 4 every 4 years; test 5 and after may be performed at the established GL 96-05 periodic test interval).
Charging Pump to Perform compensatory diagnostic testing and stem SPS 2 MOV-2370 Charging 02-CH-Seal Water Not Susceptible rotation checks (i.e., tests 1 & 2 every 2 years; tests Recirculation 3 Open Low (COF < 0.1) 0.077 3 & 4 every 4 years; test 5 and after may be Isolation performed at the established GL 96-05 periodic test interval).
Page 4 of 7 Serial No.21-247 Docket Nos. 50-280/281 Updated SPS ADDDGV Susceptibility Information Attachment 2
Surry Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Plant Valve Active Safety Expert Panel Result of Susceptibility Required Name Unit Valve ID System Valve Functional Size Function Risk Ranking Evaluation Coefficient of Description (inches) (TP16-1-112 RS) Friction (Open, Medium, (Susceptible or (High, Planned Corrective Actions Close, Both) Low) not Susceptible)
Charging Pump Perform compensatory diagnostic testing and stem SPS 2 MOV-2373 Charging 02-CH-Discharge Not Susceptible rotation checks (i.e., tests 1 & 2 every 2 years; tests Recirculation 3 Open Low (COF < 0.2) 0.102 3 & 4 every 4 years; test 5 and after may be Isolation performed at the established GL 96-05 periodic test interval).
Residual Heat Internal valve repair within 2 years; OR perform 02-RH-Residual Removal Outlet diagnostic testing every 2 years until the internal SPS 2 MOV-2720A Heat Isolation to 10x8xl0 Open Medium Susceptible 0.183 valve is repaired. Repair is currently scheduled for Removal Accumulator the Unit 2 2024 RFO.
Discharge Line
Residual Heat Internal valve repair within 2 years; OR perform 02-RH-Residual Removal Outlet diagnostic testing every 2 years until the internal SPS 2 MOV-2720B Heat Isolation to 10x8x10 Open Medium Susceptible 0.179 valve is repaired. Repair is currently scheduled for Removal Accumulator the Unit 2 2024 RFO.
Discharge Line
High Head Safety Perform stem rotation checks in conjunction with SPS 2 02-SI-MOV-Safety Injection from 4 Both High Not Susceptible NIA established GL 96-05 periodic diagnostic testing 2842 Injection Charging Header to (Repaired) requirements.
RCS Cold Legs
Page 5 of 7 Serial No.21-247 Docket Nos. 50-280/281 Updated SPS ADDDGV Susceptibility Information Attachment 2
Surry Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Plant Valve Active Safety Expert Panel Result of Susceptibility Required Name Unit Valve ID System Valve Functional Size Function Risk Ranking Evaluation Coefficient of Description (inches) (TP16-1-112 RS) Friction (Open, Medium, (Susceptible or (High, Planned Corrective Actions Close, Both) Low) not Susceptible)
Low Head Safety 02-SI-MOV-Safety Injection Pump Not Susceptible Perform stem rotation checks in conjunction with SPS 2 2864A Injection Cold Leg 10 Both Low (Repaired) NIA established GL 96-05 periodic diagnostic testing Discharge Stop requirements.
Valve Low Head Safety 02-SI-MOV-Safety Injection Pump Not Susceptible Perform stem rotation checks in conjunction with SPS 2 2864B Injection Cold Leg 10 Both Low (Repaired) NIA established GL 96-05 periodic diagnostic testing Discharge Stop requirements.
Valve
02-SI-MOV-Safety High head safety Not Susceptible Perform stem rotation checks in conjunction with SPS 2 2867C Injection Injection to RCS 3 Both High NIA established GL 96-05 periodic diagnostic testing Cold Legs (Repaired) requirements.
02-SI-MOV-Safety High head safety Not Susceptible Perform stem rotation checks in conjunction with SPS 2 2867D Injection Injection to RCS 3 Both High (Repaired) NIA established GL 96-05 periodic diagnostic testing Cold Legs requirements.
Low Head Safety Perform compensatory diagnostic testing and stem SPS 2 2890A Injection 02-SI-MOV-Safety Injection Pump Hot Not Susceptible rotation checks (i.e., tests I & 2 every 2 years; tests Leg Discharge Stop 10x8x10 Both Low (COF < 0.1) 0.080 3 & 4 every 4 years; test 5 and after may be Valve performed at the established GL 96-05 periodic test interval).
Page 6 of 7 Serial No.21-247 Docket Nos. 50-280/281 Updated SPS ADDDGV Susceptibility Information Attachment 2
Surry Power Station Units 1 and 2 Anchor Darling Double Disc Gate Valves Subject to the Flowserve Part 21
Plant Unit Valve ID System Valve Active Safety Expert Panel Result of Susceptibility Required Name Valve Functional Size Evaluation Coefficient of Description (inches) Function Risk Ranking (TP16-1-112 RS) Friction (Open, Medium, (Susceptible or (High, Planned Corrective Actions Close, Both) Low) not Susceptible)
Low Head Safety Perform compensatory diagnostic testing and stem rotation checks (i.e., tests 1 & 2 every 2 years; tests SPS 2 02-SI-MOV-Safety Injection Pump Hot 10x8x10 Both Low Not Susceptible 0.092 3 & 4 every 4 years; test 5 and after may be 2890B Injection Leg Discharge Stop (COF < 0.1) performed at the established GL 96-05 periodic Valve test interval).
Low Head Safety 02-SI-MOV-Safety Injection Pump Not Susceptible Perform stem rotation checks in conjunction with SPS 2 2890C Injection Cold Leg 10x8x10 Both Low (Repaired) NIA established GL 96-05 periodic diagnostic testing Discharge Stop requirements.
Valve
Page 7 of 7