ML16076A262
| ML16076A262 | |
| Person / Time | |
|---|---|
| Site: | Peach Bottom  |
| Issue date: | 03/14/2016 |
| From: | Ward M Anvil Engineered Pipe Supports |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 51788 | |
| Download: ML16076A262 (5) | |
Text
03/14/2016 Part 21 (PAR)
Event#
51788 Rep Org: ANVIL ENGINEERING PIPE SUPPORT Notification Date I Time: 03/14/2016 14:07 (EDT)
Supplier: ANVIL ENGINEERING PIPE SUPPORT Event Date I Time: 10/01/2015 (EDT)
Last Modification: 03/14/2016 Region:
1 Docket #:
City: NORTH KINGSTOWN Agreement State:
Yes County:
License #:
State: RI NRC Notified by: MARK R. WARD Notifications: JAMES NOGGLE RIDO HQ Ops Officer: DONG HWA PARK PART 2 1/50.55 REACTORS EMAIL Emergency Class: NON EMERGENCY 10 CFR Section:
21.21 (a)(2)
INTERIM EVAL OF DEVIATION PART 21 - HYDRAULIC SNUBBER SEAL MATERIAL DEVIATION INTERIM REPORT "Anvil Engineered Pipe Supports (EPS) supplied 14 Fig. 200N Configuration 'A' style hydraulic snubbers to the Exelon owned and operated Peach Bottom Atomic Power Station (PBAPS) in 2013. During the course of routine refueling outage activities in October 2015, it was discovered that 9 of these 14 snubbers had no hydraulic fluid in the reservoir. The cause of the hydraulic fluid loss was premature aging of the reservoir piston seal due to vibration induced frictional heat. Subsequent laboratory testing of both replacement and degraded seal material by Exelon Power Labs suggested that a material substitution had been made from the Anvil approved Ethylene Propylene (EP) compound to a different grade of EP rubber.
"On February 17, 2016, Anvil determined that a material substitution was made by the seal vendor. A machined seal that was fabricated by the manufacturer was substituted for a seal molded with the approved Anvil compound. Prior to its installation in Fig. 200N/201 N Configuration 'A' hydraulic snubbers, the machined seal compound was not tested to establish a service life for the Compound.
"Anvil has bounded the extent of condition to 4 specific seal batches of 4" and 5" Fig. 200N/201 N Configuration 'A' reservoir piston seals provided after January 1, 2013. Based on its Part 21 investigation, Anvil has yet to determine that a specific defect exists, based on the demonstrated operability of the snubbers at PBAPS despite severe service conditions beyond their published operational limits, and the compatibility of the EP base polymer with Anvil hydraulic fluids.
"Anvil is conducting a test campaign to approve and establish a service life for the machined seal compound. This testing will either qualify the machined compound for use at currently published Anvil service conditions (157 degrees F for 25 years with a total lifetime dose not to exceed 2e8 rads), or establish a reduced service life for the snubbers in which a material substitution was made. This testing is being conducted on an assembled reservoir
- 1
03/14/2016 U.S. Nuclear Regulatory Commission Operations Center Event Report Pagfe 2 with the substitute machined compound. It will include irradiation of the reservoir to 6.4e7 rads, accelerated temperature aging, and a final radiation exposure to bring the cumulative dose to 2e8 rads. As of 3/1 4/1 6, the reservoir specimen had been irradiated to 6.4e7 rads with no effect on the seal.
"Anvil expects to have this testing complete by May 1, 2016, with a formal evaluation to follow. PBAPS has been notified of the material substitution, and a full accounting of the affected snubbers by serial number, P0 number, site, and utility is being assembled. Anvil will notify affected sites when the testing and equivalency evaluation is complete.
"Please feel free to contact me if you have any questions or require any additional information.
"Sincerely, Mark R Ward Operations Manager Anvil Engineered Pipe Supports 160 Frenchtown Road North Kingstown, RI, 02852"
Mar. 14. 2016 1:59PM Anvil EngPipe No. 0266 P.
rax Cover Sheet To:
NRC Operations Center Fax 301-816-5151 From:
Anvil Fngineered Pipe Supports 401I-886-3000 Pages: 2
Mar, 14.,2Q16 1:59PM Anvil EngPipe No, Q266 F: 2 IL EPSEPS Manufacturing Plant Precision Park i
160 Frenchtowni Road CAN~i t~3North Kingstown, Ri-USA 02252 EfNGINEERED PMPE SUPPORTS Voice: (401) 886-3000 Fax: (401) 88*6-3010 March 14, 2016 11S Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike, Rockviile, MD, 20852-2746"
Subject:
Anvil Fig. 200N/2IJIN Configuration'. "A" Size 4" and 5" Hydraulic Snubber Seal Material Deviation Interim Report This is to notify the US Nuclear Regulatory Commiss~ion that, in accordance with the provisions of 10CFR Part 21, we have identified a potential issue and ar* submitting an interim report df our evaluation of the event.
.Description and information regarding facility, supplied component, defect or failure to comply being evaluated, Anvil Engineered Pipe Supports (EPS) suppli~ed 14 Fig. 2O0N Configuration "A"~ style hydraulic snubbers to the Exelon own~d and operated Peach Bottom Atomic Power Station* (PBAPS) in 2013.
During the course of routirierefueling outage activties in' October 2015, it was discoveredthat 9 of these l4 snubbers had no hydraulic fluid in the reservoir. The cause of the hydraulic fluid loss was premature aging of the reservoir piston seal dueta'yibratidn induced frictional heat).Subsequent-laboratory testing of both replacement and degraded sealrnmate'rial by Exelon Pbwer Labs suggested that a material substitution hadheenmade. from the Ar~vil approved Ethylene Propylene (EP) compound to a' different gradeof Ep rubber.
On February 17, 2016, Anvil determined th*at a material substitution was made by the seal vendor. A machined seal that was fabricated by temanufacturer was substituted for a seal molded with the approved Anvil comnpound. Prior to its installation in Fig. 200N/201N Configuration "A" hydraulic snubbers, the machined seal compound was not tested to establish a service life for the compound.
Anvil has bounded the extent of condition to 4 specific seal batches of 4" and 5" Fig. 200N/ZO1N Configuration "A" reservoir piston seals provided after January 1ft of 2013. Based on its Part 21 Investigation, Anvil has yet to determine that a specific defect exists, based on the demonstrated operability of the snubbers at PBAPS despite severe service conditions beyond their published operational limits, and the compatibility of the EP base polymer with Anvil hydraulic fluids.
Anvil is conducting a test campaign to approve and establish a service life for the machined seal compound. This testing will either qualify the machined compound for use at currently published Anvil Page 1 of 2 BUILDING CONNECTIONS THAT LAST MM BRANDS:
C'~
CW~!M (~5SJE~ S~ ~ML
Mar. 14. 2Q16 1:59PM AnH ngieJoQ26 P 3 ANVIlL EPS ENGINEERED PIPE :SUPPORTS EPS Manufacturing Plant Precision Park 160 Frenchtown Road North Kingstown, RI-USA 02852 Voice: (401) 886-3000 Fax: (401) 886-3010 service conditions (1570 F for 25 years with a total lifetime dose not to exceed 2e8 rads), or establish a reduced service life for the snubbers in which a material substitution was made. This testing is being conducted on.an assembled reservoir with the substitute machined compound. It will include irradiation of the reservoir to 6.4e7 rads, accelerated temperature aging, and a final radiation exposure to bring the cumulative dose to 2e8 radt. As of 3/14/16, the reservoir specimen had been irradiated to 6.4e7 rads with no effect on the seal.
Anvil expects to have this testing complete by May int, 2016, with a formal evaluation to follow.
PBAPS has been notified of the material substitution, and a full accounting of the affected snubbers by serial number, P0 number, site, and utility is being assembled. Anvil will notify affected sites when the testing and equivalency evaluation is complete.
Please feel free to contact me if you have any questions or require any additional information.
Sincerely, Mark B Ward Operations Manager Anvil Engineered Pipe Supports 160 Frenchtown Road North Kingstown, RI, 02852 Page 2 of 2 BUILDING CONNECTIONS THAT LAST
03/14/2016 Part 21 (PAR)
Event#
51788 Rep Org: ANVIL ENGINEERING PIPE SUPPORT Notification Date I Time: 03/14/2016 14:07 (EDT)
Supplier: ANVIL ENGINEERING PIPE SUPPORT Event Date I Time: 10/01/2015 (EDT)
Last Modification: 03/14/2016 Region:
1 Docket #:
City: NORTH KINGSTOWN Agreement State:
Yes County:
License #:
State: RI NRC Notified by: MARK R. WARD Notifications: JAMES NOGGLE RIDO HQ Ops Officer: DONG HWA PARK PART 2 1/50.55 REACTORS EMAIL Emergency Class: NON EMERGENCY 10 CFR Section:
21.21 (a)(2)
INTERIM EVAL OF DEVIATION PART 21 - HYDRAULIC SNUBBER SEAL MATERIAL DEVIATION INTERIM REPORT "Anvil Engineered Pipe Supports (EPS) supplied 14 Fig. 200N Configuration 'A' style hydraulic snubbers to the Exelon owned and operated Peach Bottom Atomic Power Station (PBAPS) in 2013. During the course of routine refueling outage activities in October 2015, it was discovered that 9 of these 14 snubbers had no hydraulic fluid in the reservoir. The cause of the hydraulic fluid loss was premature aging of the reservoir piston seal due to vibration induced frictional heat. Subsequent laboratory testing of both replacement and degraded seal material by Exelon Power Labs suggested that a material substitution had been made from the Anvil approved Ethylene Propylene (EP) compound to a different grade of EP rubber.
"On February 17, 2016, Anvil determined that a material substitution was made by the seal vendor. A machined seal that was fabricated by the manufacturer was substituted for a seal molded with the approved Anvil compound. Prior to its installation in Fig. 200N/201 N Configuration 'A' hydraulic snubbers, the machined seal compound was not tested to establish a service life for the Compound.
"Anvil has bounded the extent of condition to 4 specific seal batches of 4" and 5" Fig. 200N/201 N Configuration 'A' reservoir piston seals provided after January 1, 2013. Based on its Part 21 investigation, Anvil has yet to determine that a specific defect exists, based on the demonstrated operability of the snubbers at PBAPS despite severe service conditions beyond their published operational limits, and the compatibility of the EP base polymer with Anvil hydraulic fluids.
"Anvil is conducting a test campaign to approve and establish a service life for the machined seal compound. This testing will either qualify the machined compound for use at currently published Anvil service conditions (157 degrees F for 25 years with a total lifetime dose not to exceed 2e8 rads), or establish a reduced service life for the snubbers in which a material substitution was made. This testing is being conducted on an assembled reservoir
- 1
03/14/2016 U.S. Nuclear Regulatory Commission Operations Center Event Report Pagfe 2 with the substitute machined compound. It will include irradiation of the reservoir to 6.4e7 rads, accelerated temperature aging, and a final radiation exposure to bring the cumulative dose to 2e8 rads. As of 3/1 4/1 6, the reservoir specimen had been irradiated to 6.4e7 rads with no effect on the seal.
"Anvil expects to have this testing complete by May 1, 2016, with a formal evaluation to follow. PBAPS has been notified of the material substitution, and a full accounting of the affected snubbers by serial number, P0 number, site, and utility is being assembled. Anvil will notify affected sites when the testing and equivalency evaluation is complete.
"Please feel free to contact me if you have any questions or require any additional information.
"Sincerely, Mark R Ward Operations Manager Anvil Engineered Pipe Supports 160 Frenchtown Road North Kingstown, RI, 02852"
Mar. 14. 2016 1:59PM Anvil EngPipe No. 0266 P.
rax Cover Sheet To:
NRC Operations Center Fax 301-816-5151 From:
Anvil Fngineered Pipe Supports 401I-886-3000 Pages: 2
Mar, 14.,2Q16 1:59PM Anvil EngPipe No, Q266 F: 2 IL EPSEPS Manufacturing Plant Precision Park i
160 Frenchtowni Road CAN~i t~3North Kingstown, Ri-USA 02252 EfNGINEERED PMPE SUPPORTS Voice: (401) 886-3000 Fax: (401) 88*6-3010 March 14, 2016 11S Nuclear Regulatory Commission Document Control Desk 11555 Rockville Pike, Rockviile, MD, 20852-2746"
Subject:
Anvil Fig. 200N/2IJIN Configuration'. "A" Size 4" and 5" Hydraulic Snubber Seal Material Deviation Interim Report This is to notify the US Nuclear Regulatory Commiss~ion that, in accordance with the provisions of 10CFR Part 21, we have identified a potential issue and ar* submitting an interim report df our evaluation of the event.
.Description and information regarding facility, supplied component, defect or failure to comply being evaluated, Anvil Engineered Pipe Supports (EPS) suppli~ed 14 Fig. 2O0N Configuration "A"~ style hydraulic snubbers to the Exelon own~d and operated Peach Bottom Atomic Power Station* (PBAPS) in 2013.
During the course of routirierefueling outage activties in' October 2015, it was discoveredthat 9 of these l4 snubbers had no hydraulic fluid in the reservoir. The cause of the hydraulic fluid loss was premature aging of the reservoir piston seal dueta'yibratidn induced frictional heat).Subsequent-laboratory testing of both replacement and degraded sealrnmate'rial by Exelon Pbwer Labs suggested that a material substitution hadheenmade. from the Ar~vil approved Ethylene Propylene (EP) compound to a' different gradeof Ep rubber.
On February 17, 2016, Anvil determined th*at a material substitution was made by the seal vendor. A machined seal that was fabricated by temanufacturer was substituted for a seal molded with the approved Anvil comnpound. Prior to its installation in Fig. 200N/201N Configuration "A" hydraulic snubbers, the machined seal compound was not tested to establish a service life for the compound.
Anvil has bounded the extent of condition to 4 specific seal batches of 4" and 5" Fig. 200N/ZO1N Configuration "A" reservoir piston seals provided after January 1ft of 2013. Based on its Part 21 Investigation, Anvil has yet to determine that a specific defect exists, based on the demonstrated operability of the snubbers at PBAPS despite severe service conditions beyond their published operational limits, and the compatibility of the EP base polymer with Anvil hydraulic fluids.
Anvil is conducting a test campaign to approve and establish a service life for the machined seal compound. This testing will either qualify the machined compound for use at currently published Anvil Page 1 of 2 BUILDING CONNECTIONS THAT LAST MM BRANDS:
C'~
CW~!M (~5SJE~ S~ ~ML
Mar. 14. 2Q16 1:59PM AnH ngieJoQ26 P 3 ANVIlL EPS ENGINEERED PIPE :SUPPORTS EPS Manufacturing Plant Precision Park 160 Frenchtown Road North Kingstown, RI-USA 02852 Voice: (401) 886-3000 Fax: (401) 886-3010 service conditions (1570 F for 25 years with a total lifetime dose not to exceed 2e8 rads), or establish a reduced service life for the snubbers in which a material substitution was made. This testing is being conducted on.an assembled reservoir with the substitute machined compound. It will include irradiation of the reservoir to 6.4e7 rads, accelerated temperature aging, and a final radiation exposure to bring the cumulative dose to 2e8 radt. As of 3/14/16, the reservoir specimen had been irradiated to 6.4e7 rads with no effect on the seal.
Anvil expects to have this testing complete by May int, 2016, with a formal evaluation to follow.
PBAPS has been notified of the material substitution, and a full accounting of the affected snubbers by serial number, P0 number, site, and utility is being assembled. Anvil will notify affected sites when the testing and equivalency evaluation is complete.
Please feel free to contact me if you have any questions or require any additional information.
Sincerely, Mark B Ward Operations Manager Anvil Engineered Pipe Supports 160 Frenchtown Road North Kingstown, RI, 02852 Page 2 of 2 BUILDING CONNECTIONS THAT LAST