ML071430262

10 CFR Part 21 Report Concerning 3 and 4 Borg Warner Check Valves, Amendment of Information Previously Supplied

ML071430262
Person / Time
Site:	Browns Ferry, Palo Verde, Watts Bar, Sequoyah, Ginna, Comanche Peak, Bellefonte
Issue date:	05/17/2007
From:	Barry R Flowserve Corp
To:	Document Control Desk, Office of Nuclear Reactor Regulation
References
Download: ML071430262 (38)

Text

I Flow Control Division AnchorDarlingValves FLOWSERVE BWAP Valves Edward Valves Vaftek Conrol Products Nftnooo Worcester Valves May 17, 2007 Document Control Desk U.S. Nuclear Regulatory Commission Washington DC, 20555-0001

Subject:

10 CFR Part 21 report concerning 3" and 4" Borg Warner Check Valves

Reference:

NRC Part 21 Report 2001-27-0

Dear Sir or Madam:

This letter is intended to amend information previously supplied in the Part 21 report referenced above. The report advised of a potential problem with 3" and 4" Borg Warner swing check valves and disc assemblies supplied in 1977 or earlier.

Flowserve has identified one instance in which valves with this design configuration were supplied after 1978. The details concerning this situation are provided in the attached letters.

Please advise if there are any questions concerning this issue.

Flowserve Corporation Flow Control Division Robert D. B. B

Quality Assurance Manager Attachments Flewserve U S Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Dision PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.fiowserve.com

Flow Control Division FLOWSERVE 0@

BWA7P Valves Edward Valves Valtek ControlProducts Worcester Valves May 17, 2007 Page 1 of 2 Arizona Public Service Company PO Box 52034 Mail Station 7990 Phoenix, AZ 85072-2034 Attention: Procurement Engineering Section Leader

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Sir or Madam:

On August 23, 2001, Flowserve - Williamsport, PA issued the enclosed IOCFR Part 21 report regarding Borg Warner 3" and 4" swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve U S Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.fowserve.com

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface fiat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the 10CFR Part 21 report issued by Flowserve - Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner - Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3"-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all.of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. Barry Quality Assurance~ae~r Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Flow Control Division Anchor/Darding Valves FLOWSERVE BWIP Valves Edward Valves Valtek ControlProducts Worcester Valves May 17, 2007 Page 1 of 2 Constellation Energy 1503 Lake Road Ontario, NY 14519 Attention: Manager, Quality Assurance

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Sir or Madam:

On August 23, 2001, Flowserve - Williamsport, PA issued the enclosed 10CFR Part 21 report regarding Borg Warner 3" and 4" swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve U S Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.flowserve.com

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the 10CFR Part 21 report issued by Flowserve -Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3"and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner - Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3Y-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. BaB Quality Assurance Manager Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Flow Control Division FLOWRE E FE LOS V EEdward Anchor/Darlingr Valves VatekBWAIP Valves Valves VateConfrol roducts Worcester Valves May 17, 2007 Page 1 of 2 Duke Energy Carolinas LLC PO Box 1006 Charlotte, NC 28201-1006 Attention: OEA Manager, Nuclear Assessment Division Mail Code EC05P

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Sir or Madam:

On August 23, 2001, Flowserve -Williamsport, PA issued the enclosed 10CFR Part 21 report regarding Borg Warner 3" and 4" swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve U S Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.flowserve.corn

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the 10CFR Part 21 report issued by Flowserve - Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner -Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner- Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3"-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. Barry Quality Assurance Manager Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Flow Control Division Anchor/Darling Valves FLOWSERVE BWiP Valves Edward Valves Vaftek Control Products N%W50- Worcester Valves May 17, 2007 Page 1 of 2 Edison Material - Songs PO Box 128 Clemente, CA 92674-0128 Attention: Manager, Nuclear Oversight Division

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Sir or Madam:

On August 23, 2001, Flowserve -Williamsport, PA issued the enclosed 10CFR Part 21 report regarding Borg Warner 3" and 4" swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed inservice. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve U S Inc Raleigh Operations Tofl Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.flowserve.com

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the 10CFR Part 21 report issued by Flowserve - Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to'determine. The design data from Borg Warner - Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3X-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able td determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. Barry Quality Assurance Nflger Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Flow Control Division Anchor/DardingValves FLOWSE RVE BW/AP Valves Edward Valves Vaftek Contro Products N%MM-O* Worcester Valves May 17, 2007 Page 1 of 2 Entergy Operations, Inc.

PO Box 31995 Jackson, MS 39286-1995 Attention: Manager, Operating Experience

Subject:

10 CFR Part 21 report concerning Borg Warner 3"& 4" Swing Check Valves

Dear Sir or Madam:

On August 23, 2001, Flowserve -Williamsport, PA issued the enclosed IOCFR Part 21 report regarding Borg Warner 3' and 4' swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve US Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.fiowserve.com

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the 10CFR Part 21 report issued by Flowserve -Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner - Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3"-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Divisio, Robert D. Barry Quality Assurance Manager Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Flow Control Division FLOWSERVE Anchord Valves Vaftek Conro Products Worcester Valves May 17, 2007 Page 1 of 2 Florida Power & Light 700 Universe BLVD PO Box 14000 Juno Beach, FL 33408 Attention: R.A. Symes, Supervisor of Performance Assessment

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Mr. Symes:

On August 23, 2001, Flowserve - Williamsport, PA issued the enclosed 10CFR Part 21 report regarding Borg Warner 3" and 4" swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve US Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.flowserve.com

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the 10CFR Part 21 report issued by Flowserve - Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner - Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3 and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the eadiest convenience.

A review of the assembly drawings for 3"-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. Barry Quality Assurance Manager Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Flow Control Division Ancoo'Darfing Valves FLOWSERVE 0:2

(@Vaftek 1k 0BW17P Valves Edward Valves Control Products Worcester Valves May 17, 2007 Page 1 of 2 Knolls Atomic Power Laboratory Kesselring Site Operation 350 Atomic Project Road Ballston Spa, NY 12020-2817 Attention: Mr. David Couse

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Sir or Madam:

On August 23, 2001, Flowserve - Williamsport, PA issued the enclosed 1 OCFR Part 21 report regarding Borg Warner 3" and 4" swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve U S Inc Raleigh Operations Tog Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.flowserve.com

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the 10CFR Part 21 report issued by Flowserve - Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4' Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner -Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3X-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. Barry Quality Assurance Manager Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Flow Control Division Anchor3arding Valves FLOWSE RVE BWIP Valves Edward Valves Vaftek Control Products Worcester Valves May 17, 2007 Page 1 of 2 Nukleama Elektrarna Krsko 8270 Krsko, Vrbina 12 Slovenia Attention: Zvonimir Zec, Superintendent Engineering Support

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Mr. Zec:

On August 23, 2001, Flowserve - Williamsport, PA issued the enclosed I OCFR Part 21 report regarding Borg Warner 3" and 4' swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or eadier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve U S Inc Raleigh Operations Tol Free: 1400-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.flowserve.con

Flowserve reviewed the Page 2 of 2 During the Part 21 investigation regarding the stud failure, history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the IOCFR Part 21 report issued by Flowserve -

Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner - Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3X-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. Barry Quality Assurance lgan~ager Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Mark Alsip, International Team Leader (919-831-3279)

Flow Control Division Anchor/Darring Valves BWAP Valves F LOWS E RVE Edward Valves Valtek Control Products Worcester Valves May 17, 2007 Page 1 of 2 Tennessee Valley Authority Nuclear Assurance and Licensing Chattanooga, TN 37402-2801 Attention: Manager, Operating Experience

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Sir or Madam:

On August 23, 2001, Flowserve- Williamsport, PA issued the enclosed IOCFR Part 21 report regarding Borg Warner 3" and 4" swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 5 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be flat and flush with the back face of the disc.

Flowserve US Inc Raleigh Operations Toll Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 wwfiowserve.com

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the IOCFR Part 21 report issued by Flowserve -Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner - Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3"-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. Barry Quality Assuran ager Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

Flow Control Division Anchor/DarlingValves FLOWSERVE BW/1P Valves Edward Valves Valtek ControlProduds N%W0006- Worcester Valves May 17, 2007 Page 1 of 2 TXU Electric Company - CPSES PO Box 1002 Glen Rose, TX 76043 Attention: Group Vice President - Nuclear

Subject:

10 CFR Part 21 report concerning Borg Warner 3" & 4" Swing Check Valves

Dear Sir or Madam:

On August 23, 2001, Flowserve - Williamsport, PA issued the enclosed 10CFR Part 21 report regarding Borg Warner 3" and 4" swing check designs. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching on the seat ring bore and prevent the valve from closing.

The report recommended inspection of 3" and 4" swing check valves or disc assemblies purchased in 1977 or earlier. At the time, it was believed that by 1977 all such designs were modified to provide a weld configuration flush with the back face of the disc as shown in the attached Figure 1. Design calculations determined that this modification limited the disc angular movement and prevented the problem described above.

On March 7, 2007, Arizona Public Service Co. advised Flowserve of an incident involving a 3"-

300 Borg Warner swing check valve in which the disc assembly stud failed in service. The valve was supplied by Borg Warner Corporation - Van Nuys, California sometime between 6 79 and 11-30-81. The APS investigation concluded that the apparent cause of the failure was due to cyclic fatigue brought on by the repeated impacting of the valve disc to the seat caused by a lack of DP across the valve.

The APS investigation concluded that the failure of the stud was not reportable but that Flowserve would be notified of the incident. Flowserve investigated the incident and also concluded that the stud failure was not reportable. Swing check component failure due to unstable flow and cyclic fatigue is a situation well documented throughout the industry.

However, the APS investigation report noted that the disc-to-stud weld surface was raised and non-uniform. APS understood that the surface of the weld should be fiat and flush with the back face of the disc.

Flowserve U S Inc Raleigh Operations Tol Free: 1-800-225-6989 Flow Control Division PO Box 1961 Phone: 1-919-832-0525 1900 South Saunders Street Facsimile: 1-919-831-3369 Raleigh, NC 27603 www.flowserve.com

Page 2 of 2 During the Part 21 investigation regarding the stud failure, Flowserve reviewed the history of the disc assembly drawing and discovered that the weld configuration was not modified to provide a surface flat and flush with the back face of the disc until 1990. This finding is inconsistent with the information provided in the 10CFR Part 21 report issued by Flowserve - Williamsport in August of 2001.

The purpose of this letter is to notify the industry that some 3" and 4" Borg Warner swing check disc assemblies provided after 1977 have the same problem as that reported in 2001 for assemblies supplied in 1977 or earlier.

The extent of this condition is not known and difficult to determine. The design data from Borg Warner - Van Nuys has transferred through 3 facilities since 1986 and is incomplete. A review of the data remaining today could not be 100 percent conclusive in determining whether any other disc assembly drawings were overlooked when the design modification was implemented by Borg Warner - Van Nuys in 1977.

The only known design with this condition is disc assembly drawing number 76333, which is identified as the disc and stud assembly part number on the Borg Warner valve assembly drawing. Flowserve has no reason to believe that the number of disc assemblies with raised welds produced after 1977 is extensive. However, knowing that there was one with this condition, Flowserve decided it would be prudent to re-notify all utilities originally notified in 2001.

Flowserve recommends that 3" and 4" Borg Warner swing check valves and spare part disc assemblies provided after 1977 be inspected for this condition at the earliest convenience.

A review of the assembly drawings for 3"-300 Borg Warner check valves currently in-service may be conducted to identify any with disc and stud assembly part number 76333. Those provided in 1990 or earlier may not have the modified design.

As indicated above, this report is not limited to the 76333 design. It is currently the only one known to have a raised weld after 1977. Though it is not possible for Flowserve to identify all of the designs currently in service, Flowserve can confirm the modification date for any disc and stud assembly part number identified by the utility.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact one of the team leaders listed below, if Flowserve can assist you in any way.

Flowserve Corporation Flow Control Division Robert D. Barry Quality Assurance er Attachments:

Cc: Dan Hall, North Team Leader (919-831-3245)

Gary Shaw, South Team Leader (919-831-3331)

Dave Osborne, West Team Leader (919-831-3277)

V PR~-] 7 __777

_ ~lA

___ 4I Figure 1 - Design History

FLOWSERVE Flow Control Division August 23, 2001 U.S. Nuclear Regulatory Commission Attn: Linda Joy Smith 611 Ryan Plaza Drive Arlington, TX 76011

Subject:

Borg-Warner 3" and 4" Swing Check Valves

Dear Linda:

As we discussed over the last few weeks, Arizona Public Service advised Flowserve that a 4--1500#

Swing Check Valve didn't perform properly for the same reason that was earlier reported as a IOCFR21 on a 4"-150# Swing Check Valve. A copy ofthe original report is attached.

Also attached is a copy of the letters sent to all customers who received either 3" or 4" Swing Check Valves of any pressure class during the time when the problem may have occurred. These are submitted per your request.

Please advise if there are any additional questions.

FLOWSERVE CORPORATION Flow Control Division G.W. Knieser Technical Manager Attachments cc: USNRC, Document Control Desk, Washington, DC GWK/dc Fbmv FCD Corporatkx Wilflamspot Operatoms Phone 570 327 4800 AUnit of Flowserve Corpcato P.O.Bx 3428 701 First Street FasIm1Ie 570 327 4805 Row Control DMon WillfamspoKt PA 17701-0428 wwwlowservmcom

\C1

BW1IP Intemational, Inc.

SWo.

jaciron P.O. tox to$ Angeles Teiephon 2017 2t13876171 Twn*in 9W51 Telex Pumps Anmx 677233 Fax Coenrtfgar- 2135892080 PumpS PLOP uDhson 12 February 1993 U. S. Nuclear Regulatory Commission.

Attn: Document Control Desk Washington, D. C. 20555 Gentlemen:

This letter transmits a notification of defects and nonconformances required by IOCFR - Part 21. The attached notification, CFRM-9301, reports a condition which occurred at Texas Utilities, Comanche Peak Steam Electric Station.

Very truly yours, 0

D. A. Gibson Manager Nuclear Products Operations DAG/ah Attach.

cc: Mr. K. B. Lemmon, Manager, Field Service Operations Mr. R. D. Ham, Manager of Quality Mr. F. Costanzo, Manager of Engineering Mr. K. A. Huber, Technical Liaison Mr-. IW.A. Klenner, Product Manager

10 GM PART 21 NOTIFICATION (Reference No. CFRN-9301)

NAME AND ADDRESS OF THE INDIVIDUAL OR INDIVIDUALS INFORMING THE.

COMMISSION:

Mr. D. A. Gibson BW/IP International, Inc.

Pump Division Los Angeles Operation 2300 E. Vernon Avenue Vernon, CA 90058 (213) 587-6171 For Technical Information

Contact:

Dr. Kent.Huber IDENTIFICATION OF THE FACILITY, THE ACTIVITY, OR THE BASIC CMMPONENT SUPPLIED FOR SUCH FACILITY OR SUCH ACTIVITY WITHIN THE UNITED STATES EHICi FAILS TO CO[PLY OR CONTAINS A DEFECT:

Texas Utilities, Comanche Peak Steam Electric Station.

Basic Component: 4-inch 150# Bolted Bonnet Swing Check Valve IV/IP Part No. 75580 TU Tag lNos. 2CC-0697 & 2CC-0693 IDENTIFICATION OF THE FIRM CONSTRUCTING THE FACILITY OR SUPPLYING THE BASIC COMPONENT WHICH FAILS TO COMPLY OR CONTAINS A DEFECT:

ZW/IP International, Inc.

Successor to:

Borg-Warner Nuclear Valve Division 7500 Tyrone Avenue Van Nuys, CA 91409 Page 1 of 3 U_

10 CFR, Part 21, Notification (Ref. No. CFRN-9301)

NATURE OF THE DEFECT OR FAILU TO COMPLY AND THE SAFETY HAZARD WHICH IS CREATED OR COULD BE CREATED BY SUCH DEFECT OR FAILURE TO COMPLY:

Valve 2CC-0697 did not fully close during pre-operational testing. Radiographs taken at the time of failure show the disk positioned at approximately 210 from the full closed position. The valve was disassembled. The top of the disk was found to be lodged under the seat lip preventing full closure.

Valve 2CC-0693 subsequently failed testing in a similar manner.

Both valves are located in the Component Cooling Water return lines from the Reactor Coolant Pump Motor Coolers and do not serve an active safety function. However the failure mechanism could apply to other valves that do provide a safety function.

Evaluation of the basic component by BW/IP indicates the root cause of the failure to close is due to the configuration of the attachment weld between the disk to the stud. Prior to 1977, this weld was placed on the back surface of the stud and extended into the bushing bore. In disks manufactured after 1977, the weld was recessed into the back surface of the disk and a final machine out made to assure a flush surface.

THE DATE ON WHICH THE INFORMATION OF SUCH DEFECT OR FAILURE TO COMPLY WAS OBTAINED:

The incident was initially reported to BW/IP on 18 December 1992. Additional information has subsequently been supplied by Texas Utilities.

IN THE CASE OF A BASIC COMPONENT WHICH CONTAINS A DEFECT OR FAILS TO COMPLY, THE NUMBER AND LOCATION OF ALL SUCH COMPONENTS IN USE AT, SUPPLIED FOR, OR BEING SUPPLIED FOR ONE OR MORE FACILITIES OR ACTIVITIES SUBJECT TO THE REGUIATIONS IN THIS PART:

This notice applies to all BWV/P 4-inch, 150#, bolted bonnet swing check valves wbich have a raised disk-stud retention weld on the back surface of the disk.

Page 2 of 3

10 CFl, Part 21, Notification t (Ref. No. CFRX-9301)

THE CORRECTIVE ACTION WHICH HAS BEEN, IS BEING, OR WILL BE TAKEN; THE NM OF THE INDIVIDUAL OR ORGANIZATION RESPONSIBLE FOR THE ACTION; AND THE LENGTH OF TIRE THAT HAS BEEN OR WILL BE TAMEN TO COMPLETE THE ACTION:

Corrective action is complete vith the disk design modification identified above.

ANY ADVICE RELATED TO THE DEFECT OR FAILURE TO COMPLY ABOUT THE FACILITY, ACTIVITY, OR BASIC COMPONENT MWAT HAS BEEN, IS BEING, OR WILL BE GIVEN TO PURCHASERS:

Licensees with valve installations effected by this notice should install a new disk component or refurbish the existing disk.

Page 3 of 3

.2

Requ'red Angle of Disc R~otation and Axial Gap for laterferme 9

FLOWSERVE :Iwcontrol Diision August 14,2001 Edison Material - Songs P.O. Box 128 Clemente, CA 92674-0128 Attn: Manager, Nuclear Oversight Division

Subject:

Borg-Warner 3" & 4" Swing Check Valves

Dear Sirs:

On February 12, 1993, BW/IP, Los Angeles, California issued the enclosed IOCFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-150# bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report, BW/IP determined the problems was not limited to that single design but potentially extended to all Borg-Warner 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizna Public Service Co. advised Flowserve that they recently encountered the same problem on a 4"-1500# pressure seal swing check valve. Because ofthis, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier of the potential pr*blem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem if there is excessive disc angular movement.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the sfeety significance of the problem. Please contact either Dan Hall (570-327-4866) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division Contract Administrator CEF/dc Fmserve FCD Comton MWlamsport Opwatons Phone 570 327 4800 AUnit ofFo se Coporion P.O. Ba 3428 701 First Street Facslmfle 5703274805 Row Control Divs*on W0lampod PA 17701-0428 www.flowserve.com

FLOWSERVE Flow Control Division August 14,2001 Arizona Public Service Company P.O. Box 52034 Mall Station 7990 Phoenix, AZ 85072-2034 Attn: Procurement Engineering Section Leader

Subject:

Borg-Warner 3" & 4" Swing Check Valves

Dear Sirs:

On February 12,1993, BW/IP, Los Angeles, California issued the enclosed 1ICFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-150# bolted bonnmet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report; BW/IP determined the problems was not limited to that single design but potentially extended to all Borg-Warner 3" and 4" swing check designs: It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Service Co. advised Flowserve that they recently encountered the same problem on a 4"-1S00# pressr seal swing check valve. Because of this, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier of the potential problem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem if there is excessive disc angular movement.

Flowser* is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact either Dan Hall (570-327-4966) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division Contract Administrator CEF/dc Flowserve FCD Corporon WiaspoOperalis Phone 50 327 4800 AUnitof FFowserve Coporation P.O. Box 3428 701 Rrst Skeet Facsmile 5703274805 Flo Control Division Wlffiamsp4d, PA 17701-0428 wwwJlowserve.com

FLOWSERVE Flow Control Divslon August 14,2001 TXU Electric Company - CPSES P.O. Box 1002 Glen Rose, TX 76043 Attrn Lance Terry, Group Vice President - Nuclear Subject Borg-Warner 3" & 4" Swing Check Valves

Dear Mr. Terry:

On February 12, 1993, BW/IP, Los Angeles, California issued the enclosed IOCFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-150# bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report, BWAIP determined the problems was not limited to that single design but potentially extended to all Borg-Warner 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Service Co. advised Flowserv that they recently encountered the same problem on a 4"-1500# pressure seal swing check valve. Because of this, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier of the potential problem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem if there is excessive disc angular movement Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact either Dan Hall (570-327-4U66) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division

-I

Contract Administrator CEF/dc Powerye FCD Co*qora*n Williansport Operatons Phone 6703274800 AUnt of mfwve Corporation P.O. Box 3428 701 First Street Facsimile 570327 4805 Raw CoW Dnvisln Wiransport, PA 11701-0428 www.flawserve.om

FLOWSERVE FlowControl Division August 14,2001 Florida Power & Light P.O. Box 14000 Juno Beach, FL 33408 Attn: P.A. Symes, Supervisor of Performance Assessment Subject Borg-Wamer 3" & 4" Swing Check Valves

Dear Mr. Symes:

On February 12, 1993, BWJIP, Los Angeles, California issued the enclosed IOCFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-150# bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back ofthe disc and consequently permit excessive angular movement ofthe disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those fuir-ished In 1977 or earlier.

Subsequent to the report, BW/IP determined the problems was not limited to ihat single design but potentially extended to all Borg-Warner 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Service Co. advised Flowserve that they recently encountered the same problem on a 4"-1500# pressure seal swing check valve. Because of this, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier ofthe potential problem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem if there is excessive disc angular movement.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact either Dan Hall (570-327-4866) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division Contract Administratorfl &f CEF/dc Flowserve FCD Coora Wilamspoit Operations Phone 570 327 4800 AUritof oserm Corpot P.O. Box 3428 701 Rrst Street Facsmimle 570 327 4805 Row Control Dinilon WillamsportL PA 17701-0428 w.owseve.com

FLOWSERVE nConWUvslon August 14, 2001 Duke Energy Corporation P.O. Box 1006 CMarlotte, NC 28201-1006 Attn: Manager, Operating Experience Assessment Group, MIS EC05P

Subject:

Borg-Warner 3" & 4"Swing Check Valves

Dear Sirs:

On February 12, 1993, BW/MP, Los Angeles, California issued the enclosed 10CFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-150# bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back ofthe disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventihg the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report, BW/IP determined the problems was not limited to that single design but potentially extended to all Borg-Warner 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Service Co. advised Flowserve that they recemtly encountered the same problem on a 4"-1500# pressure seal swing check valve. Because of this, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier of the potential problem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem if there is excessive disc angular movement.

Flowserve is not aware ofexactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance ofthe problem. Please contact either Dan Hall (570-327-4866) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division ILL Patterson Sr. Contract Administrator HLP/dc FbmwreFCD *iwrcVf pt Phu5-70O3V4800 RxiA=

AUkit dFo OM-o P.Q BoC3428 701 Rdt Sbv Fa-n'le5703274805 FlotwCtd ltson Wria" port W 1T7-0428 wwd@Aarve.oom VA

FLOWSERVE Flow Control Division Augus* 14,2001 Entergy Operations, Inc.

1448 S.R. 333 Russellville, AR 72801 Attn: Mr. Lloyd Magness

Subject:

Borg-Warner 3" & 4" Swing Check Valves

Dear Mr. Magness:

On February 12,1993, BW/IP, Los Angeles, California issued the enclosed I0CFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-150# bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report, BW/IP determined the problems was not limited to that single design but potentially extended to all Borg-Warner 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Service Co. advised Flowserve that they recently encountered the same problem on a 4"-l 500f pressure seal swing check valve. Because ofthis, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier of the potential problem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The eaclosed sketch depicts the potential problem if there is excessive disc angular movement Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact either Dan Hall (570-327-4866) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division H.L. Patterson Sr. Contract Administrator HLPI'dc Floserve FCD Caporation Wl*lamspod0perations Phone 570 327 4800 AUni od FIowserve CaporAon P.O. Box 3428 701 First Stret Facsmile 5703274805 How Control Dlvsmon WllamspoA, PA 17701-0428 w.Alowservem

FLOWSERVE Flow Control Division August 14,2001 Knolls Atomic Power Laboratory Kesselring Site Operation 3 50 Atomic Project Road Ballston Spa, NY 12020-2817 Attn. Mr. David Couse Subject Borg-Warner 3" & 4" Swing Check Valves

Dear Mr. Couse:

On February 12,1993, BW/IP, Los Angeles, California issued the enclosed 10CFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-450f bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consecjuently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report, BWAIP determined the problems was not limited to that single design but potentially extended to all Borg-Warner 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Service Co. advised Flowserve that they recently encountered the same problem on a 4"-1500# pressure seal swing check valve. Because of this, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier of the potential problem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem If there is excessive disc angular movement Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safty significance of the problem. Please contact either Dan Hall (570-327-4866) or George Knieser (570-327-4U11) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division H.L Patterson Sr. Contract Administrator HLP/dc FbFeveiCD Cmp-Aon Wfaansot Operatos Phone 570 327 4800 AUnft oflRowem Coporaton P.O. B5:x3428 701 FkstShreet Facsirdle 570327 4805 Flow Convrd Division Wlfiarnspot, PA 17701-0428 w,,,owmerve.corn

FLOWSERVE Fw Control D on August 14, 2001 Nuklearna Elektrarna Krsko 8270 Krsko, Vrbina 12 Slovenia Att: M. Ncovsak, Engineering Director

Subject:

Borg-Warner 3" & 4" Swing Check Valves Dear 1&. Novsak.

On February 12,1993, BW/IP, Los Angeles, California issued the enclosed 10CFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"150# bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report, BW/IP determined the problems was not limited to that single design but potentially extended to all Borg-Warner 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Service Co. advised Flowserve that they recently encountered the same problem on a 4'-1500# pressure seal swing check valve. Because of this, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier ofthe potential problem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem if there is excessive disc angular movement Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance ofthe problem. Please contact either Dan Hall (570-327-4866) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division HJ.. Patterson Sr. Contract Administrator HLP/dc SowsemV FCM CPopai WlARnamsport 0per;4= Phoe 570 327 4800 A Unit of Fowseve Corporation P.O. Box 3428 701 First Streel Facsimle 570-3274805 Flow Control Division Wiliamspot, PA 17701.0428 wmowse.I e.com

FLOWSERVE Flow Cont Dision August 14, 2001 Rochester Gas & Electric Ginna Station 1503 Lake Road Ontario, NY 14519 Attn: Mr. Mike Burchell

Subject:

Borg-Warner 3" & 4" Swing Check Valves

Dear Mr. Burchell:

On February 12, 1993, BW/IP, Los Angeles, California Issued the enclosed I0CFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-150# bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-o-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report., BWIIP determined the problems was not limited to that single design but potentially extended to all Borg-Warer 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Soevice Co. advised Flowserve that they recently encountered the same problem on a 4"-1500# pressure seal swing check valve. Because of this, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier ofthe potential problem. We recommend the valves be Inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem if there is excessive disc angular movement.

Flowserve is not aware ofexactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance ofthe problem. Please contact either Dan Hall (570-327-4866) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division H.L. Patterson Sr. Contract Administrator HLP/dc Flcwser FMD Coporation arasport Op-adons Phone 570 327 4800 AUnL of Fhsere Corpation PO. Box 3428 701 frl Street Fcsimrle 570 327 4805 RoW Contro Dion WiiarsporL PA 17701-0428 www.Iowseuvem.om

FLOWSERVE Flow Control Division August 14, 2001 Tennessee Valley Authority Nuclear Assurance and Licensing 1101 Market Street Chattanooga, TN 37402-2801 Attm Manager, Operating Experience Subject Borg-Warner 3" & 4" Swing Check Valves

Dear Sirs:

On February 12, 1993, BW/IP, Los Angeles, Califomia issued the enclosed 10CFRPart 21 report to the NRC describing a nonconforming condition with Borg-Warner 4"-150# bolted bonnet swing check valves. Some disc assemblies were shipped with an excessive stud-to-disc weld that could keep the disc washer too far from the back of the disc and consequently permit excessive angular movement of the disc. This could result in the top of the disc catching in the seat ring bore and preventing the valve from closing. The design was revised in 1977 so the only affected valves and spare part disc assemblies were those furnished in 1977 or earlier.

Subsequent to the report BW/IP determined the problems was not limited to that single design but potentially extended to all Borg-Warner 3" and 4" swing check designs. It is not clear that all utilities were advised of this.

On May 31, 2001, Arizona Public Service Co. advised Flowserve that they recently encountered the same problem on a 4"-1500# pressure seal swing check valve. Because of this, Flowserve decided it would be prudent to notify or re-notify all customers who purchased 3" or 4" swing check valves or disc assemblies in 1977 or earlier of the potential problem. We recommend the valves be inspected at the earliest convenient time and if evidence of interference is found, replace the disc assembly. The enclosed sketch depicts the potential problem if there is excessive disc angular movement.

Flowserve is not aware of exactly how all of these valves are being used by the utilities and therefore has not been able to determine the safety significance of the problem. Please contact either Dan Hall (570-327-4866) or George Knieser (570-327-4811) if Flowserve can assist you in any way.

FLOWSERVE CORPORATION Flow Control Division H.L. Patterson Sr. Contract Administrator HLP/dc Flowserve FCD CotpoAon Wiliamspod Opertins Phone 570 327 4800 AUnit of lonserve Crporaion P.O. Box 3428 701 First Street Facsimile 570 327 4805 Flow Conlrd Division Wliarmspot, PA 17701-0428 wa.lowseive.onn