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The following information was received fro … The following information was received from Velan Inc by facsimile:</br>SUBJECT NOTIFICATION: 2 INCH BONNETS, VELAN PART NUMBER 8943-014</br>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:</br>- 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.</br>- 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.</br>-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.</br>On June 10, 2014 the bonnet, identified in the last bullet above, arrived at Velan Plant 2.</br>The review by the (Velan) Evaluation Committee was finalized on July 17 and concluded that:</br>-Four similar bonnets were delivered to WES on three different occasions in 1988 and early 90's</br>-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.</br>-On opening, if the limit switches on the actuator do not function, the stem may enter the packing chamber. The 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.</br>-If the actuator and packing flange nuts are removed, there is the potential for the stem to blow out of the valve.</br>-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.</br>-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.</br>These bonnets were fabricated against ASME Sec. Ill 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.</br>* * * UPDATE PROVIDED FROM VICTOR APOSTOLESCU TO JEFF ROTTON AT 1435 EDT ON 07/28/2014 * * *</br>Reporting Organization/Supplier who made the original event report on 07/18/2014 reported to the NRC Operations Center that the Event Notification posted has a typographical error regarding the Velan, Inc part number described in the report. The original documentation provided was concerning Velan Part Number 8943-014 which was mistakenly transcribed as 6943-014 in the original report. This error has been corrected in this updated report.</br>Notified R4DO (Okeefe) and Part 21 Group via email.R4DO (Okeefe) and Part 21 Group via email.
04:00:00, 17 July 2014 +
50,284 +
08:28:00, 18 July 2014 +
04:00:00, 17 July 2014 +
The following information was received fro … The following information was received from Velan Inc by facsimile:</br>SUBJECT NOTIFICATION: 2 INCH BONNETS, VELAN PART NUMBER 8943-014</br>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:</br>- 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.</br>- 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.</br>-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.</br>On June 10, 2014 the bonnet, identified in the last bullet above, arrived at Velan Plant 2.</br>The review by the (Velan) Evaluation Committee was finalized on July 17 and concluded that:</br>-Four similar bonnets were delivered to WES on three different occasions in 1988 and early 90's</br>-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.</br>-On opening, if the limit switches on the actuator do not function, the stem may enter the packing chamber. The 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.</br>-If the actuator and packing flange nuts are removed, there is the potential for the stem to blow out of the valve.</br>-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.</br>-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.</br>These bonnets were fabricated against ASME Sec. Ill 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.</br>* * * UPDATE PROVIDED FROM VICTOR APOSTOLESCU TO JEFF ROTTON AT 1435 EDT ON 07/28/2014 * * *</br>Reporting Organization/Supplier who made the original event report on 07/18/2014 reported to the NRC Operations Center that the Event Notification posted has a typographical error regarding the Velan, Inc part number described in the report. The original documentation provided was concerning Velan Part Number 8943-014 which was mistakenly transcribed as 6943-014 in the original report. This error has been corrected in this updated report.</br>Notified R4DO (Okeefe) and Part 21 Group via email.R4DO (Okeefe) and Part 21 Group via email.
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00:00:00, 28 July 2014 +
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08:28:00, 18 July 2014 +
1.186 d (28.47 hours, 0.169 weeks, 0.039 months) +
04:00:00, 17 July 2014 +
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