E-Mailed Request for Information for Byron Station, Unit 2, on 03/27/19 (DRS-M.Holmberg)| ML19087A148 |
| Person / Time |
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| Site: |
Byron  |
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| Issue date: |
03/27/2019 |
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| From: |
NRC/RGN-III |
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| To: |
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| References |
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| Download: ML19087A148 (3) |
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ADAMS Accession Number: ML19087A148 Part B Items (Onsite) - NRC information Requests (March 27, 2019) - ISI Byron U 2 1) ITEM B.1 - requested documents for the following selected weld activities
- A. Welding activity completed during prior outage.
Work Order Code Class Description 01952003-01 2 (2CV8351) Install Additional Isolation Valve downstream of 2CV8350 per EC040564 B. Welding activity scheduled to occur during the current outage.
Work Order Code Class Description 01380459-01 2 2SIJ7A, CM 2SIJ7A
-3/4"- Fab/Install SI Vent in 2A Suction per EC 381903
- 2) ITEM B.2 Documents
- ISI related corrective actions AR/IR Number Description/Topic 04097807 01/27/2018 CORROSION ON 2A DG JACKET WATER COOLER CHANNEL HEAD 0 4062274 2SI8905D - LOOP 4 HOT LEG SI CHK VL V 04137953 05/15/2018 CORROSION ON SX RISER VALVE PIPING 04058120 2RC8037C BODY/BONNET INACTIVE LEAK 04059080 BORIC ACID LEAK ON 2RC8037A 04059953 ACTIVE BORIC ACID LEAK ON 2SI051 04059979 ACTIVE BODY TO BONNET LEAK ON 2SI8905D 04064624 ACTIVE LEAK ON 2CV8368B 04085285 RCS LEAK RATE EXCEEDED ACTION LEVEL 3 04085629 U-2 RCS LEAK RATE DEVIATION ACTION LEVEL II 04087635 UNIT 2 RCS LEAK RATE CALCULATION EXCEEDED PARAMETERS 04090712 RCS LEAK RATE ACTION LEVEL 2 04121830 SX LEAK ON JACKET WATER COOLER DURING SX FLUSH 04209055 UNEXPECTED ALARM
- U-2 CONTAINMENT LEAK DETECTION HIGH 04222319 RCS LEAK RATE EXCEEDED ACTION LEVEL 3 04230553 POTENTIAL INACTIVE LEAK ON 2SX03B LINE 04155764 U2 LOOSE PARTS IMPACT NOISE MULTIPLE ALARMS RECEIVED 0 1326215 BB S-10 Small Bore Class 1 Weld Actions 02704898 2SX035 - Leak
- 3) Item B.3- Documents for Components with Relevant Indications Component AR No or Letter Supporting docs 10/12/2017
- NDE - LINEAR INDICATION OBSERVED DURING EXAM Provide a copy of AR 04062252 with all corrective action assignment s (CA s). Detailed construction/fabrication drawing for affected component and associated piping drawing.
Nondestructive Exam report(s) and completed corrective actions for AR and site procedure with acceptance criteria that were applied for this issue.
10/12/2017 B2R20 M4 NDE
- LINEAR INDICATION OBSERVED DURING EXAM Provide a copy of AR 04062274 with all CAs. Detailed construction/
fabrication drawing for affected component and associated piping drawing.
Nondestructive Exam report(s) and completed corrective actions for AR and site procedure with acceptance criteria that were applied for this issue.
Unit 2 Containment Liner Corrosion- "Based on ultrasonic testing, the maximum metal loss observed on the containment liner is 0.103" at one location. This is the only location on the containment liner that has reached 40% metal loss from nominal thickness. The nominal plate thickness of the containment liner is 0.250" thick. The two pits identified in B2R20 are the only locations for Unit
-2 that exceed the ASME Code Section Xl Subsection IWE acceptance criteria of 10%. The pit at D2 Location 1 is 27.2% metal loss from nominal thickness and the pit at D2 Location 3, mentioned previously, resulted in 41.2% metal loss. Byron Letter dated January 18, 2018
- BYRON 2018
-0002 "Byron Station Unit 2 90-Day Inservice Inspection Report for Interval 3, Period 3 and Interval 4, Period 1, (B2R20)" Provide ARs and CAs associated with these liner pits as described in your January 18, 2018 letter. Nondestructive Exam report(s) and site procedure with acceptance criteria applied to these degraded areas. Applicable calculations that support the evaluation s of each degraded areas as described in your January 18, 2018 letter.
- 4) Item B.4- Updated Schedules
- NDE and Welding Activities as identified in A.1 of Request Letter. Specifically, include the inspection priority items selected below and a current copy of the applicable procedures:
Week of 4/8/19 (M
- F) and Week of 4/15/19 (M
- F) - NDE Activities UT, (Cat R-A, R1.11.3) 3 of 7 FW welds - (e.g. FW03DA
-16/C15, 16, 19, 20, 21, 22 or 26). Procedure
- EXE PDI-UT-1 Ultrasonic Examination of Ferritic Pipe Welds in Accordance with PDI
-UT-1. UT, (Cat B-B, Item B2.40)
- SG - Stub Barrel Channel Head Weld - 2RC-01-BA/SGC-01. Procedure
- EXE-ISI-210 - Manual Ultrasonic Examination of Vessel Welds.
PT, (Cat C-B, Item C2.21)
- Feedwater Nozzle Weld
- 2RC-01-BA/SGN-02 Procedure - ER-AA-335-002 - liquid penetrant examinations
. PT, (Cat C-C, Item C3.20) - Closure Plate 2AB
-37 Weld - 2RH02AA-8/C47 Procedure ER
-AA-335-002 - liquid penetrant examinations
. Thursday- 4/11/19 Thermal Sleeve Wear Measurement/Examination
- Work order and Procedure
- LCM 16-0002. Friday & Saturday & Monday 4/12, 13 & 15 of 2019 - BMV Examination Rx Head VE- BMV -2RC02R- Reactor Head Bare Metal visual examination
-CC-729 Procedure - ER-AP-335-001 BARE METAL VISUAL EXAMINATION FOR NICKEL ALLOY MATERIALS, R6 04/15/19 - Monday (Note Sunday 4/14/19 at 1600 Start)
Weldi ng - WO 01380459 CM 2SIJ7A-3/4"- FAB/INSTALL SI VENT IN 2A SUCT PER EC 381903 and applicable welding procedures (e.g. 8-8-GTSM, or 1-1-GTSM PWHT.