Analysis of Self-Shutdown Behavior in the Spert I Reactor

Abstract

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Ebwr Core 1a Physics Analysis

“…Past experience has shown that the set of parameters V -2.47, r] -2.08, and a = 0.184 describes a consistent set at thermal energies. Therefore, associated with Amster's value of G?^^, the value of CJp was 15 adjusted to fit a = 0.182 at the softest available spectrum (zero voids, thin fuel elements); the subsequent relative variation of crf/ag, as given by Amster's compilation was maintained.…”

“…14, The void coefficient with 10 grams boric acid and reactor cold is still negative (even though substantially smaller in magnitude than with no boric acid); Ak/Av = -0.12 (0 gm/gal), -0,085 (5 gm/gal), -0.045 (10 gm/gal). 15. The management of the boric acid system will probably be as follows:…”

Hazards Summary Report on the Juggernaut Reactor

“…(5) Check that the dial settings for the high flux trip levels are correct. These should correspond to 120% of normal operating power on Channel IV Safety Trip A and Channel V Safety Trip B, and 90% of full scale on Channel VI Safety Trip C. (6) Check that the period trip (10 sec) operates using the periodcheck switch if shutdown has been for an extended period.…”

Spert Iv Hazards Summary Report

“…The pool portion of t h e f a c i l i t y i s made lly, of two 50,000 g a l capacity tanks. The pools a r e f a b r i c a t e d from5/16 i n . t h i c k s t a i n l e s s s t e e l and a r e designed f o r 25 f t of h y d r o s t a t i c l o a d plus a 50 p s i overpressure.…”