Beyond Code Safety Requirements

For the highest reliability nuclear pressure systems, there is a need to impose additional requirements to those of the design codes. Such requirements include inspection qualification, repeat inspections, checks on material composition, mechanical properties testing, fracture mechanics assessments and increased design margins. The workshop/seminar will focus on how these requirements are understood and implemented.

The safety implications and costs of the requirements are significant and the requirements are more open to interpretation than code compliance. The event is structured around the main disciplines concerned:

• Materials, covering materials testing, welding and manufacturing control
• Inspection, covering non-destructive examination (NDE) and inspection qualification
• Stress analysis and fracture mechanics

The objectives are to: develop a consistent understanding of the requirements; identify areas of good practice and areas where the advice and/or interpretation of beyond code safety requirements could be improved.

The workshop/seminar will contain input from senior ONR experts and senior experts from nuclear licensee organisations including Horizon, CGN (China), EDF, and Rolls-Royce.

Programme

9:30, Arrival (Tea/Coffee): Rooms 4 and 5, BAWA

Introduction
10:00, FESI speaker: Peter Flewitt (University of Bristol)
10:15, ONR speaker: Andrew Holt
Materials Testing, Welding, and Manufacturing Control
10:40, ONR representative: Martin Lamb
11:00, Licensee representatives: Titot Prayoga (NNB GenCo)
NDE and Inspection Qualification
11:20, ONR representative: Russ Booler
11:40, Licensee representatives: Andrew Wood (Rolls-Royce), Jinkiang/Jin Ting (CGN)
Stress Analysis and Fracture Mechanics
12:00, ONR representative: Alexander Price
12:20, Licensee representatives: Michael Martin (Rolls-Royce), Jinkiang/Jin Ting (CGN)
12:40, Licensee representatives’ general views: Chris Bell (Rolls-Royce)

13:00–14:00, Lunch

14:00, Three discipline-related discussion groups running in parallel (coffee included):
“How beyond code safety requirements can be met for materials, inspection and stress analysis”

Followed by reporting from the discussion groups:
15:00, Materials Testing, Welding, and Manufacturing Control
15:20, NDE and Inspection Qualification
15:40, Stress Analysis and Fracture Mechanics

16:00, Wrap-up discussion and closing remarks

16:30, End

In the FESI News section of our website, we have published a number of presentations that were delivered in the morning session of this joint FESI-ONR workshop as well as a preliminary report written by John Sharples.