05000331/FIN-2018001-01
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Finding | |
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| Title | Failure to Perform Nondestructive Examination of Main Steam Isolation Valve 4415 Following Machining of Valve Bore |
| Description | On February 28, 2018, while the licensee was planning contingency work order packages for possible MSIV repairs during the upcoming refuel outage (RFO) 26, a self-revealing failure to perform an NDE of MSIV CV 4415 during RFO 25 was identified. During RFO 25, inboard MSIV CV 4415 failed local leak rate testing. The valve was disassembled; the valve bore was machined, and the valve was reassembled. Subsequently, the valve passed local leak rate testing. However, the licensee failed to perform post-machining NDE of the valve bore as required by plant design. The MSIV was purchased and installed in accordance with USAS B 31.1.0. The General Requirements of USAS B31.1.0, Part 107, Valves, states that (a) Valves complying with the standards and specifications listed in Table 126.1 may be used within the specified pressure-temperature ratings, (b) Valves not complying with Paragraph (a) above shall be of a design, or equal to the design, which the manufacturer recommends for the service as stipulated in Paragraph 102.2.2. Purchase Specification General Electric Spec. No. 21A9230, Revision 2, requires in Part 6.2.4, Castings for pressure-containing parts shall be 100 percent examined by radiography and all accessible surfaces, including machined surfaces, shall be examined by either liquid penetrant or magnetic particle methods following heat treatment. Re-examination of repaired areas shall be by the above techniques following heat treatment. Contrary to the above, the licensee failed to perform either liquid penetrant or magnetic particle testing following machining of the valve bore. The inspectors determined that the failure to perform design required NDE was a performance deficiency. However, the inspectors cannot assess whether the performance deficiency is more than minor until they review the NDE results. Planned Closure Actions: The inspectors will review the results of the NDE after it is performed during RFO 26 and determine the significance of the violation. Licensee Action: The licensee will perform an NDE of the MSIV bore during RFO 26. Corrective Action Reference: CR 02251009; Missed NDE During Rebuild Of MSIV CV4415. On January 10, 2018, the inspectors evaluated the licensees response to a B Channel half SCRAM condition. The half SCRAM was caused by the failure of Average Power Range Monitor (APRM) B. The inspectors determined the operators appropriately implemented pertinent procedures and Technical Specification requirements which allowed the operators to bypass APRM B and reset the half SCRAM. The licensee performed simple troubleshooting and determined the power supply for APRM B had failed. The power supply had recently been replaced. The inspectors determined the licensee had replaced the power supply in accordance with NextEra procedures and that the APRM power supply failure was not within the licensees ability to foresee and prevent. The licensee entered this minor issue into their corrective action program as CR 02243984; E/S 265 No Voltage Output. The inspectors discussed the corrective actions and associated evaluations with licensee personnel. |
| Site: | Duane Arnold  |
|---|---|
| Report | IR 05000331/2018001 Section 1R15 |
| Date counted | Mar 31, 2018 (2018Q1) |
| Type: | URI: |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | C Norton J Steffes R Stone A Dunlap T Nakanishi J Neurauter T Ospino K Stoedter |
| Violation of: | Pending |
| INPO aspect | |
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Finding - Duane Arnold - IR 05000331/2018001 | |||||||||||||||||||||||||||||||
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Finding List (Duane Arnold) @ 2018Q1
Self-Identified List (Duane Arnold)
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