Exelon BWR Spring 2016 Outages Plant Experience ...
Exelon BWR Spring 2016 Outages Plant Experience Reports Quad Cities Unit 2 Q2R23 March 2016
BWRVIP Inspect Focus Group and Assessment Committee Meetings June 13-16, 2016
Q2R23 – March 2016 • Modifications – None • UT - None • Visual Scope − Core Spray Piping – 36 Welds, all NRI − Core Spray Sparger – 2 Lower drain plugs with NRI (But with missing tack welds) − Interior Attachments – 4 WSL, 5 GRSBA, 10 SSH brackets with NRI, except: • On-going wear to Dryer WSL − CASS Components – 7 items on JP and CRD GT (NRC License Renewal Commitment), all NRI − 2 Top Guide Aligner Assemblies/Pins with NRI − Top Guide Rim Weld – 20 Cell Locations with NRI
2
Q2R23 – March 2016 • Visual Scope − 7 FW Sparger End Brackets • On-going minor wear, with slight additional wear this exam − 14 Dry Tubes per SIL 409-R5 • 3-SRM, 3-IRM, 2-LPRM using EVT-1 2-sided due to age for cracking • 1-SRM, 5-IRM using VT-3 1-sided to for baseline on top plunger engagement • No cracking identified • Found 8 SRM/IRM with some loss of plunger engagement • Found 5 SRM/IRM with minimal plunger engagement • Performed 1-cycle evaluation • Repair next outage (replace Dry Tube or install Plunger Extension-Patented) 3
Q2R23 – March 2016 • Visual Scope − Shroud Repair Hardware at 4 Locations with – RI • Spring Ratchet not fully engaged, follow-up known issue-no changes noted − Jet Pumps • 42 High and 30 Medium Priority Welds with NRI • 2 JP Swing Gate/Main Wedge and rod with previous RI - Known minor wear indications on the rod - Follow up exams show no changes • 3 JP Aux Wedges with NRI • 8 Swing Gate Retainer Cup Tack welds - 2 as a follow-up for bad/missing welds with no changes noted • 1 Slip Joint repair clamp with previous minor wear – no changes • First weld draw bead identified on a riser pipe 4
Q2R23 – March 2016
Jet Pump Riser Draw Bead Weld
ccc 5
Q2R23 – March 2016
Missing Core Spray Drain Plug Tack Weld 6
Q2R23 – March 2016
Tie Rod Ratchet not Fully Engaged 7
Q2R23 – March 2016
Dry Tube Plunger Engagement 8
Q2R23 – March 2016
Dry Tube Plunger Engagement 9
Q2R23 – March 2016
Dry Tube Plunger Engagement 10
Q2R23 – March 2016
WSL Damage 11
Q2R23 – March 2016
WSL Damage 12
Q2R23 – March 2016
Swing Gate and Retainer Keeper Layout
13
Q2R23 – March 2016
JP06 Keeper Tack Weld 14
Q2R23 – March 2016
FW Sparger Bracket/Pin Wear 15
Q2R23 – March 2016
FW Sparger Bracket/Pin Wear 16
Q2R23 – March 2016
FW Sparger Bracket/Pin Wear 17
Q2R23 – March 2016
QUESTIONS
18
BWRVIP Inspect Focus Group and Assessment Committee Meetings June 13-16, 2016
Q2R23 – March 2016 • Modifications – None • UT - None • Visual Scope − Core Spray Piping – 36 Welds, all NRI − Core Spray Sparger – 2 Lower drain plugs with NRI (But with missing tack welds) − Interior Attachments – 4 WSL, 5 GRSBA, 10 SSH brackets with NRI, except: • On-going wear to Dryer WSL − CASS Components – 7 items on JP and CRD GT (NRC License Renewal Commitment), all NRI − 2 Top Guide Aligner Assemblies/Pins with NRI − Top Guide Rim Weld – 20 Cell Locations with NRI
2
Q2R23 – March 2016 • Visual Scope − 7 FW Sparger End Brackets • On-going minor wear, with slight additional wear this exam − 14 Dry Tubes per SIL 409-R5 • 3-SRM, 3-IRM, 2-LPRM using EVT-1 2-sided due to age for cracking • 1-SRM, 5-IRM using VT-3 1-sided to for baseline on top plunger engagement • No cracking identified • Found 8 SRM/IRM with some loss of plunger engagement • Found 5 SRM/IRM with minimal plunger engagement • Performed 1-cycle evaluation • Repair next outage (replace Dry Tube or install Plunger Extension-Patented) 3
Q2R23 – March 2016 • Visual Scope − Shroud Repair Hardware at 4 Locations with – RI • Spring Ratchet not fully engaged, follow-up known issue-no changes noted − Jet Pumps • 42 High and 30 Medium Priority Welds with NRI • 2 JP Swing Gate/Main Wedge and rod with previous RI - Known minor wear indications on the rod - Follow up exams show no changes • 3 JP Aux Wedges with NRI • 8 Swing Gate Retainer Cup Tack welds - 2 as a follow-up for bad/missing welds with no changes noted • 1 Slip Joint repair clamp with previous minor wear – no changes • First weld draw bead identified on a riser pipe 4
Q2R23 – March 2016
Jet Pump Riser Draw Bead Weld
ccc 5
Q2R23 – March 2016
Missing Core Spray Drain Plug Tack Weld 6
Q2R23 – March 2016
Tie Rod Ratchet not Fully Engaged 7
Q2R23 – March 2016
Dry Tube Plunger Engagement 8
Q2R23 – March 2016
Dry Tube Plunger Engagement 9
Q2R23 – March 2016
Dry Tube Plunger Engagement 10
Q2R23 – March 2016
WSL Damage 11
Q2R23 – March 2016
WSL Damage 12
Q2R23 – March 2016
Swing Gate and Retainer Keeper Layout
13
Q2R23 – March 2016
JP06 Keeper Tack Weld 14
Q2R23 – March 2016
FW Sparger Bracket/Pin Wear 15
Q2R23 – March 2016
FW Sparger Bracket/Pin Wear 16
Q2R23 – March 2016
FW Sparger Bracket/Pin Wear 17
Q2R23 – March 2016
QUESTIONS
18
