[Global] Doses for Pressuriser Weld Overlay

[Renn Guy]

[Classification: NOT PROTECTIVELY MARKED]
Sizewell B (Westinghouse four loop), in UK, will be carrying out full structural weld overlay of our Pressuriser nozzle welds in Spring 2023.
To help verify our dose estimates I would be grateful for any dose information from similar plants that have already performed this project.
It would be helpful to indicate the number of welds that were mitigated.
For comparison we intend to overlay on seven nozzle welds, the surge pipework, at the bottom, then six nozzles at the top of the Pressuriser, the spray nozzle, three Pilot-Operated Safety Relief Valves and two spring-loaded Safety Valves.

Thanks in advance for any information provided.

Best Regards,

Guy Renn
Head of Radiological Protection
Technical & Safety Department

T: +44 (0)1728 653 183 (Ext)
T: 718 3183 (Int)

Sizewell B Power Station
Leiston, Suffolk, IP16 4UR
United Kingdom

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