Spring 2017 Nuclear Outage Experience: Lessons Learned

This three-part webinar is focused on a few of our experiences this past 2017 outage season. You will hear about the challenges faced and how we helped resolve our clients’ issues for a successful outage season.

Each Structural Integrity presenter includes the objective of the project, pertinent information regarding the facility along with the technical approach, data and analysis results, as well as conclusions and the recommendations shared. Below is a summary about each topic scheduled to be covered during the webinar.


Webinar 1: Temperature and Vibration Monitoring in Support of Emergent Flaw Discovery

Date: July 25th at 2:00pm

This past spring, Structural Integrity provided temperature and vibration monitoring support on an emergent basis in response to flaws detected during MRP-146 related examinations. An extensive monitoring effort was employed at two sites where ID connected cracking was discovered in the unisolable sections of safety injection piping attached to a reactor coolant system cold leg. The objective of the monitoring effort was two-fold, (i) to assist the plant in identifying the root cause of the cracking, and (ii) to better define the thermal loading at the crack location for supporting analysis to possibly defer repair/replacement for one or more operating cycles. This webinar details the monitoring effort at both sites and shows how each objective was accomplished. In addition, SI’s expertise in monitoring from instrumentation selection to installation to data reduction will be profiled demonstrating significant utility benefit.

The Host:
Robert McGill

Bob McGill is a Senior Associate at Structural Integrity. He has been involved with the thermal fatigue management program sponsored by EPRI for normally stagnant RCS branch lines and RHR mixing tees since 2005. His involvement has included development of guidance reports and supporting stress, fatigue and fracture mechanics analyses. He has conducted numerous EPRI sponsored training sessions for industry engineers related to thermal fatigue.


Webinar 2: Two Topics Featuring Chemistry within the Nuclear Power Plant

Date: August 1st, 2017 @ 2:00pm

This webinar will cover two topics concerning Chemistry and the Nuclear Power Plant environment where we provided assistance during this past spring outage season.

  • Topic 1- “ Startup/Shutdown Reactor Coolant Chemistry Excursions” – Three examples will be discussed where we helped three different BWR stations respond to chemistry transients in the reactor coolant during the spring 2017 outage season.
  • Topic 2: “Radiation Source Term”. Examples will be presented from 2017 and 2016 outages where we were contracted by BWRs and PWR plants (directly and through EPRI) after the outage was completed to help them understand why they did not meet their outage radiation exposure goals.

The Host: Al Jarvis

Al Jarvis has 38 years of experience in the nuclear industry, including 14 years in the chemistry department at a U.S. commercial nuclear power plant (over 6 years as the Chemistry Manager) and 16 years as a Chemical Engineering consultant with Structural Integrity/Finetech. Al has worked with utility clients and EPRI on various chemistry projects related to chemistry control (primary and secondary system)and radiation source term reduction at nuclear power plants.


Webinar 3: High Outage Impact Inspections – What You Need to Know to be Prepared

Date: August 15, 2017 @ 2:00pm

While many locations that are inspected are at low risk of finding degradation, the consequences of finding degradation is high due to unplanned evaluations and potential repairs to bring a station back online. This webinar will briefly discuss the locations and materials of concern and outline steps that can be taken to reduce the impact on the station during the outage if unfavorable results are obtained. Topics discussed will include pre-outage readiness, emergent flaw evaluations and potential repair methods. SI has worked on many high impact locations this spring and will share some of our lessons learned.

The Hosts:
David Segletes

David Segletes has 24 years of experience in supplier qualifications, manufacturing support, failure investigations, and development of rotor weld repair technology at an original equipment manufacturer. Since joining Structural Integrity Associates he has been dedicated to supporting client needs based on his expertise in metallurgy and fabrication. He is a member of the American Society of Mechanical Engineers (ASME) and active in pressure vessel code committee work with the Section XI (Nuclear In-service Inspection) Working Group on Welding & Special Repair Processes. He has supported clients directly onsite for a variety of projects across several of the industries served by Structural Integrity Associates.

Chris Lohse

Chris Lohse has been with Structural Integrity for over 10 years. While at SI, Mr. Lohse has helped plants address their material degradation issues from main loop RCS Alloy 600 concerns to reactor vessel internals. He has specialized in the mitigation and repair of Alloy 600 components for both BWRs and PWRs and has designed and implemented dozens of welded repairs at operating units. He is a member of the American Society of Mechanical Engineers (ASME) and active in pressure vessel code committee work with the Section XI (Nuclear In-service Inspection) Task Group on High Strength Nickel Alloy Issues.