Text

NRC Selection for Onsite Review
	ML20070N022
Person / Time
Site:	South Texas
Issue date:	03/10/2020
From:	; NRC/RGN-III
To:	;
References
	Download: ML20070N022 (5)
	v • d • e

Items (Onsite) - NRC Information Request (March 10, 2020) - IP 71111.08-Inservice Inspection South Texas Project (STP) Unit 1 - Documents Selected for NRC Onsite Review Please provide a copy of the documents below to the STP Resident Inspectors Office on or before the entrance meeting scheduled March 18, 2020 or documents can be provided electronically (e.g. compact disc or Certrec IMS with onsite wi-fi access). This list of documents compliments/supplements the existing list of information requested for the onsite review as identified in NRC request for information (RFI) letter dated December 16, 2019 and includes requests for information that were not available or not provided from Section A of the request letter. Please direct questions on this request to the lead inspector Mr. M. Holmberg at msh@nrc.gov or 630-829-9748.

NRC RFI Letter Item A.1.10- Nondestructive Examination Procedures PDI-UT-8 Manual ultrasonic examination of full structural overlaid similar and dissimilar metal welds and supporting procedure demonstration qualification sheet (PDQS).

PDQS for PDI-UT-2 procedure.

UT procedure to be applied for the control rod drive mechanism (CRDM) housing welds.

Test/Programs engineering procedure(s) that identify acceptance criteria to apply for indications identified and recorded during NDE examinations and the responsible individual for applying these criteria. This would include volumetric, surface and visual examinations for Section XI required examinations and the containment surfaces (IWE).

Vendor steam generator (SG) eddy current (ET) examination and analysis procedures and site review approval documentation for these procedures.

SG ET - Copy of vendor Independent Qualified Data Analyst (IQDA) validation document/record for the examination technique specification sheets (ETSS) applied.

Specifically, these techniques shall, as a minimum, have an IQDA verify and document compliance with Appendix H of the Steam Generator Management Program: Pressurized Water Reactor Steam Generator Examination Guidelines.

NRC RFI Letter - Welding Activities Welds scheduled to be completed during current Unit 1 outage Work Order Description/Topic Supporting Documents WAN 623468 SI-96017878 2N121TSI3965 SI ACC 1C CK SI-0046C Downstream SIS Test Valve (Replace valve SI-3965 and piping)

As stated in Part 2 of the NRC request letter Welds completed during prior Unit 1 outage Authorization Doc or Repair Plan No.

Description/Topic Supporting Docs Authorization 96017800 EW-1386A-WT3 - STANLEY SPURR Replace 8" 150#

WN FF FLANGE Due to through-wall dealloying -

11/21/2019 AP13, 70, 11/21/2019. Replaced downstream EW Flange.

As stated in Part 2 of the NRC request letter Repair Plans 1-18-003 And 1-17-028 ASME, Welds, Essential cooling water pipe repair/replacement.

As stated in Part 2 of the NRC request letter NRC RFI Letter - Corrective Action Records CR Number Description/Topic Supporting Documents 18-14004 Communicate changes and or enhancements of the Contract Welding requirements to STP Welding personnel Copy of CR and all CAs.

19-1891 Identified internal erosion on the 6" aluminum-bronze piping tee and flanges upstream/downstream of EW-0189 during performance of WAN: 606453.

Copy of CR, pictures of EW-0189 condition and all CAs and applicable evaluations including applicable NDE reports.

19-3465 and 19-1966 CR to capture results of the EPRI / Westinghouse resolution to NSAL-05-02, revision 1, "steam generator secondary side 2.5 inch or less diameter un-reinforced penetration cover plate stress report error". As stated in the plant impact evaluation (CR 19-1966), a joint venture by EPRI and Westinghouse is in process to develop a generic industry response.

Copy of CRs and all CAs and applicable evaluations.

19-4031 and 19-3905 The exhaust header on DG12 has a crack in the manifold piping. This manifold is type 321 stainless steel. The recommended filler material for welding type 321 SS is E347-15 or 16 or ER347 stainless steel electrode. This electrode has alloys which enhance its high temperature strength. See CR 19-3905 1 Establish a class in for this welding filler material to be available for diesel repairs.

2 Purchase a sufficient quantity and designate it for diesel exhaust manifold repair.

3 Revise WPS P8-T-Ag, WPS P8-A and WPS P8-AT-Ag to specify that the E/ER 347 filler material is to be used for diesel exhaust repairs.

Copy of CRs and all CAs and applicable evaluations.

19-5705 When Boric Acid conditions are screened, the 3Q CR action template wording is not being completed as written (no email generated, BACCP owner not performing the evaluations). Also, a process vulnerability exists where the screening action is closed and reliance is placed on email communication to initiate the evaluation action. No cases were identified where required evaluation was not performed.

Copy of CR and all CAs and applicable evaluations.

19-9714 Evaluate reclassifying reactor vessel flange leak-off lines to determine if they can be removed from the ASME Section XI Boundaries. Reclassification will eliminate the need to test lines as required by ASME Section XI, IWA-1320(e).

Copy of CR and all CAs and applicable evaluations.

19-14823 Active seat leakage on SI-0177 with HHSI Pump 1C in service. Leakage equivalent about 20 DPM, confined within insulated line. See attached pix. Identified during 590230 SI SYSTEM CODE PRESSURE TEST.

Copy of CR, pictures and all CAs and applicable evaluations.20-538 Active leakage on CV0131A body-to-bonnet joint. Leakage deposits have accumulated on downstream piping and supports in rooms M238Q and M110. Leakage rate not quantified, but deposits are wet. See attached pix.

Copy of CR, pictures and all CAs and applicable evaluations.

NRC RFI Letter-Boric Acid Evaluations and Related Corrective Actions Condition Sequence No Description/Topic Supporting Docs 20-53 8

Active leakage on CV0131A body-to-bonnet joint. Leakage deposits have accumulated on downstream piping and supports in rooms M238Q and M110. Leakage rate not quantified, but deposits are wet. See attached pix.