Independent nuclear safety assessment of the Non-nuclear Verification Instrument T562 Page: 6 of 10
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Introduction
The System Surety Assessment Department, 12332, at Sandia National Labs was requested
to perform an independent nuclear safety assessment of the Non-Nuclear Verification
Instrument, T562, by The Stockpile Evaluation Department 1, 12361.
The purpose of the T562 is to verify that a test unit is indeed a Nuclear Explosive Like
Assembly (NELA) and not a War Reserve (WR) weapon. This assessment covers the use
of this instrument, T562, for non-nuclear verification of test units for the following
weapon programs only: B61, B83, W62, W76, W78, W80, W87, and W88. The T562 and
this assessment are not valid for verifying the B53 NELAs as non-nuclear.
Scope of Assessment
It was assumed in this assessment, that the T562 Neutron Measurement Instrument would
be used to make measurements on WR weapons.
The assessment covered the following:
" Structural integrity of the instrument
" Analysis of the electrical circuits
" Radiated Electrical Emissions
" Operating Instructions
" Operational Procedures/Unauthorized Tampering
The criteria for assessing the T562 instrument were:
" The energy generated by the instrument must not be capable of firing the
weapon detonators.
" The energy generated by the instrument must be isolated within the
instrument.
" The Operating Instructions must not cause a degradation in Nuclear
Safety.
" The Operational Procedures must prevent spoofing the instrument and
preclude the Insider Threat.
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Summers, D.A. Independent nuclear safety assessment of the Non-nuclear Verification Instrument T562, report, February 1, 1995; Albuquerque, New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc666785/m1/6/: accessed April 19, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.