ML14210A008
| ML14210A008 | |
| Person / Time | |
|---|---|
| Site: | Comanche Peak  |
| Issue date: | 07/18/2014 |
| From: | Apostolescu V Velan |
| To: | Office of Nuclear Reactor Regulation |
| References | |
| 50284 | |
| Download: ML14210A008 (4) | |
Text
0711812014 S. Nuclear Reeulatorv Commission ODerationsCenterEvent Report Pam, I Part 21 (PAR) Event # 50284 Rep Org: VELAN INC. Notification Date I Time: 07/18/2014 08:28 (EDT)
Supplier: VELAN INC. Event Date I Time: 07/17/2014 (EDT)
Last Modification: 07/18/2014 Region: Docket #:
City: MONTREAL, CANADA Agreement State: No County: License #:
State:
NRC Notified by: VICTOR APOSTOLESCU Notifications: THOMAS FARNHOLTZ R4DO HQ Ops Officer: VINCE KLCO PART 21 GROUP EMAIL Emergency Class: NON EMERGENCY 10 CFR Section:
21.21(d)(3)(i) DEFECTS AND NONCOMPLIANCE PART 21 REPORT - NOTIFICATION OF DEFECTS ON 2 INCH BONNETS The following information was received from Velan Inc by facsimile:
"SUBJECT NOTIFICATION: 2 INCH BONNETS, VELAN PART NUMBER 6943-014 "On May 16, 2014 [Velan] received notification from Westinghouse Electric Co. (WES) that 2 bonnets supplied by Velan to WES in early 2013 for installation at Comanche Peak exhibited the following issues:
- The bonnets were intended to be exact replacements for the bonnets built to drawing E73-020 Rev E (OEM is Velan) except for material change to SA-182 FXM-19. Bonnets were visually inspected when received at site. No issues were noted; both bonnets appeared to be identical.
- In April 2013, Unit 1 bonnet was installed in valve 1-8109. No issues were noted with the installation. The new bonnet was put into service.
-In April 2014, Unit 2 installation was scheduled to begin. After the disassembly of the valve, the old and new bonnets were compared. It was noted that the backseat dimensions are different between the 2 bonnets. The increase in backseat diameter on the new bonnet would cause the stem to not backseat. The decision was made to re-install the old bonnet and send the new bonnet back to the OEM, Velan.
"On June 10, 2014 the bonnet, identified in the last bullet above, arrived at Velan Plant 2.
"The review by the [Velan] Evaluation Committee was finalized on July 17 and concluded that:
-Four similar bonnets were delivered to WES on three different occasions in 1988 and early 90's
-The stem head diameter is 01.312 [inches] so, when opening, the stem may pass through the stem bore of the bonnet and not seat on the backseat.
-On opening, if the limit switches on the actuator do not function, the stem may enter the packing chamber. The 94(~L
07/18/2014 U.S. NuclearRegulatory Commission OperationsCenter Event Report Page 2 packing may be deformed and a leak may develop. Stem travel is limited by the disc contacting the bonnet and/or the end of the stem thread stopping on the actuator drive nut.
-If the actuator and packing flange nuts are removed, there is the potential for the stem to blow out of the valve.
-The packing chamber depth will result in more packing being installed in the valve. This may result in a higher packing friction load on the actuator when operating and reduce the actuator margin.
-The smaller packing chamber will not affect safety. A different diameter packing may be required. The gland bushing diameter (01.744 inches) is less than the packing chamber diameter and will work correctly.
"These bonnets were fabricated against ASME Sec. III for installation in Class 2 systems. Not knowing exactly the nature of the application we cannot determine if the [above identified] potential issues may pose a significant safety hazard and therefore we have informed WES by way of a similar letter."
JUL. 18.2014 8:28AM VELAN INC 514-342-2311 N2767 P. 1 VVrLfA 550 McArthur, Ville St-Laurent Quebec, Canada H4T 1X8 DATE: July 18, 2014 PAGE: 1 of 2 FROM: Cathy Andrewsky FAX: (301) 816-5151 PHONE: (514) 748-7748 ext 2203 TO: U.S. Nuclear Regulatory Commission FAX: (514) 342-2311 ATTN.; Document Control Desk
SUBJECT:
Notification 2 inch bonnets, Velan Part Number 8943-014 Gentlemen, Please see attached notification from Victor Apostolescu.
Regards, Cathy Andrewsky Velan Ine- [elan Valve Corporawion 7700 Core de Liesse CERTIFIED TO [SO 9001 18 Avenue "C" Montreal,Quebec QUALITY STANDARDS GriswordIndustrialPark CANADA H4T IG2 Williston1 Vermont US&A 05495-9798
JUL 18.2014 8:28AM VELAN INC 514-342-2311 N9-767 P. 2 SA A H Velan Inc.
Plant 550 McArthur Street, Montreal, 0C H4T IX8 Canada YEraun Tel: +1514 748 7743 Fax: ÷15143413032 www.velan.com July 18, 2014 U.S. Nuclear Regulatory Commission Document Corntror Desk Washington, D.C. 20555-0001 Attention: Document Control Desk, via fax 301-816-5151 Sub!. NOTIFICATION 2 INCH BONNETS, VELAN PART NUMBER 8943-014 Gentlemen, On May 16 2014 we received notification from Westinghouse Electric Co. (WES) that 2 bonnets supplied by Velan to WES in sasty 2013 for installation at Comanche Peak exhibited the following issues:
- The bonnets were intended to be exact replacements for the bonnets (item 2) built to drawing E73-020 Rev E (OEM is Velan) except for material change to 8A-182 FXM-19. Bonnets were visually inspected when received at site. No issues were noted; both bonnets appeared to be identical.
- In April 2013, unit 1 bonnet was installed in valve 1-8109. No issues were noted with the installation. The new bonnet was put into service.
- In April 2014, Unit 2 installation was scheduled to begin. After the disassembly of the valve, the old and new bonnets were compared. It was noted that the backseat dimensions are different between the 2 bonnets.
The increase in backseat diameter on the new bonnet would cause the stem to not backseat. The decision was made to re-install the old bonnet and send the new bonnet back to the OEM, Velan.
On June 10, 2014 the bonnet identified inthe last bullet above arrived at Velan Plant 2-The review by the Evaluation Committee was finalized on July 17 and concluded that:
- Four similar bonnets were delivered to WEB on three different occasions in 1988 and early 90's-tembore
- The stem headdiameter is 01.312 so, when otrin. the stem rav ass through the s of the bonnet and
_nt EMt on the backseat.
- On oWening, if the limit swltchesonthe actuatordo not functfon, the stem may enter the tacdnrg chamber. The paqkine may be deformed and a leakmav deloo. Stem travelis limited by theMdisocontactino the bonnet and/or the end of the stem thread stooinqorohe _actuatordrive nut.
- ff the actuatorandpackino f/an~anutsare removed, them is the xotetial for the stem to blow out of the valve.
- The cacidn_ chamberdepth _wllatsuit in more packing being installed in the valve- This may result in a higher packing friction load en the actuator when oagoersn_ and reduce the actuatormaqin.
The smaller packing chamber will not affect safety. A different diameter packing may be required. The gland bushing diameter (01.7445) is less than the packing chamber diameter and will work correctly.
These bonnets were fabricated against ASME Sec. I11for installation in Class 2 systems. Not knowing exactly the nature of the application we cannot determine if the potential issues in Italics and underlined above may pose a significant safety hazard and therefore we have informed WES by way of a similar letter.
For any addiftional information on this matter please contact me at 514-748-7748 x 2134 or at victor.apostolescut@ velan.oom.
Sincerely yours, Velan Inc.
Victor Apostoiescu, Eng.
Vice President Quality Assurance cc: Velan - T. Velan, I. Velan, G. Perez. Z. Palko Velan. Quality that lasts.