Sunday, 1 November 2026
Standing Office 81 (SOVNPA 81) emblem Viet Nam NVietnam National Presiding Agency
on Countering the Proliferation of Weapons of Mass Destruction
Standing Office 81

1.11.External thermal shields

List
NSG – Trigger List (Part 1) – INFCIRC/254/Rev.15/Part 1 (21 April 2026)
External thermal shields especially designed or prepared for use in a nuclear reactor as defined in paragraph 1.1. for reduction of heat loss and also for containment vessel protection.
EXPLANATORY NOTE
External thermal shields are major structures placed over the reactor vessel which reduce heat loss from the reactor and reduce temperature within the containment vessel.