ML17206A040
| ML17206A040 | |
| Person / Time | |
|---|---|
| Site: | Sequoyah, Susquehanna  |
| Issue date: | 07/14/2017 |
| From: | Kay S Crane Nuclear |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 52857 | |
| Download: ML17206A040 (5) | |
Text
0711412017* U.S. Nuclear Regulatory Commission Operations Center Event Report Pagel Part 21 (PAR) Event# 52857 Rep Org: CRANE NUCLEAR, INC. Notification Date I Time: 07/13/2017 17:59 '(EDT)
Supplier: CRANE NUCLEAR, INC. Event Date I Time: 06/05/2017 (CDT)
Last Modification: 07/13/2017 Region: *3 Docket#:
City: BOLINGBROOK Agreement State: Yes County: License#:
State: IL NRC Notified by: SAMSON KAY Notifications: ANTHONY DIMITRIADIS R1DO HQ Ops Officer: DONG HWA PARK BRIAN BONSER R2DO Emergency Class: NON EMERGENCY PART 21/50.55 REACTORS EMAIL 10 CFR Section:
21.21 (d)(3)(i) DEFECTS AND NONCOMPLIANCE PART 21 - DEFECTIVE SAFETY RELATED VALVES The following was excerpted from a letter by Crane Nuclear, Inc.:
"The plug valve designs provided for XOMOX model figure numbers 037AX, 067EG, and 037. These valves have been identified as used in nuclear and/or safety related applications.
"The stem for the Subject valve models was identified as being undersized based on allowable yield stress ahalysi~
of the stem while in torsion. The high stress condition was due to the high torque required to seat/unseat the plug when installed with a Ultra High Molecular Weight Polyethylene (UHMWPE) SIE!eve material. High friction factor inherent with this material causes torsional stress to exceed the upper limit of yield strength of the valve which could result in fatigue/yielding of the stem, thus preventing the valve from opening and closing while in service.
Historical research performed thus far has not identified any notifications from the customer(s) regarding stem failure of the subject valves, indicating that the valves may still be in operation with no performance related or operating issues.
"The corrective action which has been, is being, or will be taken; the name of the individual or organization responsible for the action; and the length of time that has been or will be .token to complete the action.
"Notifications letters have been sent to the affected plants advising them of the condition, and recommending that the sleeve material be replaced with a lower friction Polytetrafluomethylene (PTFE) material that would significantly reduce the required input ope~ating torque, thereby reducing the risk of failure of the stem material.
"XOMOX has been advised to modify design calculations to provide a larger margin for allowable yield strength of the stem material to ensure the stem is properly sized when Ultra High Molecular Weight Polyethylene (UHMWPE)
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0711412017 U.S. Nuclear Regulatory Commission Operations Center Event Report Pagel sleeve material is used.
"Crane will continue to review XOMOX records to determine if any other sites are impacted, which we expect to complete by August 31, 2017.
"Should you have any questions regarding this matter, please contact Samson Kay, Manager of Engineering at (630) 226-4983 or Jennifer Bregovy, Manager of Quality and Safety at (630) 226-4949."
The following facilities received these safety related orders: TVA Sequoyah, Pennsylvania Power & Light Susquehanna.
JUL. 13. 2017 4:38PM NO. 529 P. 1 TELEPHONE (630) Z2o4900 FA.,"{ (630):.!;;?9-4646 www.crtu;1enuclear.com NUCLEAR CRANE NUCLEAR, INC. 860 REMINGTON BOULEVARD BOLINGBROOK, IL. 60440 Date: July 131 2017
. Attn: Document Control Desk U.S. Nuclear Regulatory Commission Washington, D.C. 20555-001 Subject; 10 CFR Part 21 Investigation Report Notification of XO MOX Plug Valve High Torsional Stress in Stem
Dear Sir or Madam:
This Jetter provides notification of Crane Nuclear's investigation into XOMOX plug valves (model figure numbers 037AX, 067EG, and 037), that were provided on nuclear and safety related applications. *
(i) Name and address of the individual or individuals informing the Commission.
Samson Kay Manager of Sustaining Engineering Jennifer Bregovy Manager of Safety and Quality Crane Nuclear, Inc.
860 Remington Blvd Bolingbrook, IL 60440 (ii) Identification of th.e btJsic component supplied for such facility or such activity within the United States which may fail to comply or contoins a potential defect The plug valve designs provided for XO MOX model figure numbers 037AX, 067EG, and 037. These valves have been identified as used in nuclear and/or safety related applications.
{iii) Identification of the firm supplying the basic component which fails to comply or con'tains a defect.
The valves subject to this notice were supplied by Xornox Corporation (Xomox) prior to 2001. l.n 2001, Xornox was acquired by Crane Co., which is also the parent company of CNI. At that time CNI, the entity which is providing this notice to the Commission, began providing support for the subject valves.
{iv) Nature of the defect or failure to comply and the safety hazard which is created or could be created by such defect or failure to comply.
The stem for the Subject valve models was identified as being undersized based on allowable yield stress analysis of the s:tem while in torsion. The high stress condition was due to the high torque Page 1 of3
JUL. 13. 2017 4:38PM NO. 529 P. 2 TELEPHONE (6'.:>UJ :t~0-'1900 FAX (630)226-4646 www.cranenuck!l{,COl'.11 NUCLEAR CRANE NUCLEAR, INC. 860 REMINGTON BOULEVARD BOLINGBROOK, IL 60440 required to seat/unseat the plug when installed with a Ultra High Molecular Weight Polyethylene (UliMWPE) sleeve material. High friction factor inherent with this material causes torsional stress to exceed the upper Limit of yield strength of the valve which could result in fatigue/yielding of the stem, thus preventing the valve from opening and closing while in service.
Historical research petiormed thus far has not identified any notifications from the customer(s) regarding stem failure of the subject valves, indicating that the valves may still be in operation with no performance related or operating issues.
(11) The date on which the information of such defect or failure to comply was obtained.
Date of Discovery of Defect: 6/5/2017-6/9/2017
(
(vi) In the case of a ba$ic component whith contains a defect or fails to comply, the number and location of these components in use at1 supplied far, being supplied for, or may be supplied for, monufactured, or being monufactured for one or more facilities or activities subject to the regulations in this port:.
Historical research of the XOMOX records is still in process at this time. However, we have currently identified seven (7) sites that have previously ordered these valves.
Order date or Xo.mox I Tufline customer Size, Pressure Class, Fig. #,
Order No. OrderNo.
- Customer Valve Tag fl Assy dwg.
Code Class date C:-64021 7$121 3" 150 psi Fig. 037A, code Ce Laval 76001-135 11/15/1977 Class.3 E-64021 4" 150 psi fig. 067EG, Cr;ide 73121 Del.av;;il 7600:1.-134 11/11/1977 Class S Transamerica De l.<lval, Engine and 6" 150 psi Fig. 037A'X 2S3S6 76001-129 8/21/1989 Compressor div., Tandem, Code Class 3 Oakland, CA Vokes Limited, HMley Pork, N2943 Item 2 & 'lA l449S4 Suffolk, 6" :lSO psl Fig. 037Tandem, England. None Oct. 31, 19!l0 Sizewell "B" Nuclear Code crass s Power Station ,
47W4So.100SA, 47W450*100tlC QN'3255 90N*LA* ((6) YE041S-FD-lVASequoyah 9/7/1990 4" 150 psi fig, 067 74720B 4), (6) YES41S-FD-2, (6) YE6418-F0.4)
Pennsylvania Power HBC*PL NZX3271 7-20655-1 & Light, (Customer Item 10/10/1990 4 n 150 psi fig, 067 Susquehanna #'s 6.5 & 6.6)
(6) YE0418-FD- :
f'*93NLL- 4" 150 psi fig, 067, safety NZX3676 4), (6) VE541&-
TVA Chattanr;iog;i 6/4/1993 Related lDCFR21 Appliei; S33.90C*OOO FD-2, (6) YE6418-periVA PO pg 1.
FD-4 PageZ of3
JUL.13.2017 4:38PM NO. 529 P. 3 TELEPHONE (tijU) ..:..:o-'+900 FAX. (630)226-4646 v.*ww.c:runenuclcar.eom NUCLEAR CRANE NUCLEAR, INC. 860 REMINGTON BOULEVARD BOLINGBROOK, IL. 60440 (vii) The corrective action which has been, is being, or will be taken; the name of the individual or orgonization responsible for the octian; and the length of time that has been or will be taken to complete the action.
Notifications letters have been sent to the affected plants advising them of the condition, and re.commending that the sleeve material be replaced with a lower friction Polytetrafluoroethylene
{PTFE) material that would significantly reduce the required input operating torque, thereby reducing the risk of failure of the stem material.
- XO MOX has been advised to modify design calculations to provide a larger margin for allowable yield strength of the stem material to ensure the stem is properly sized when Ultra High Molecular Weight Polyethylene (UHMWPE) sleeve material is use~.
CNl will continue to review XOMOX records to determine if any other sites are impacted, which we expect to complete by August 31, 2017.
{viii) Any advice related to the defect or failure to comp/y, about the facility> activi~ or basic component that has been1 is being,, or will be given to purchasers or lic.ensees.
Not Applicable.
(ix) In the cose of an early site permit, the entities to wham an early site permit was transferred.
Not applicable, Should you have any questions regarding this matter) please contact Samson Kay, Manager of Engineering at (630) 226-4983 or Jennifer Bregovy, Manager of Quality and Safety at (630) 226-4949.
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