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2 150 693

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IPC

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Application

98118170/28, 1998-10-02

(24)

Start date

1998-10-02

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Actual filing date

1998-10-02

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Published

2000-06-10

(72)

Inventor

Ivanov A.I.Lushchikov V.I.

(73)

Holder

Zakrytoe Aktsionernoe Obshchestvo Nauchno-Proizvodstvennyj Tsentr

METHOD FOR CERTIFYING FISSIONABLE MATERIAL PARTS AND CHECKING THEM FOR SAFETY Russian patent published in 2000 - IPC

Abstract RU 2150693 C1

FIELD: nuclear engineering. SUBSTANCE: method involves placing mentioned parts into special measurement cavity, irradiating with neutron flows, counting number of single neutrons, two-fold, three-fold, four-fold, and more statistically confident coincidences, drawing certificates according to results of measurements in the form of combination of other-than-zero differences Δn = Nen

-Nn, where background of random coincidences of ratio n in (Nn) recording is determined by results of neutron recording according to formula Nn = Ns(w/τ)n-1exp(-w/τ)/(n-1); mentioned certificates are compared with original certificates and comparison results are used to conclude if safety of mentioned parts is adequate. EFFECT: improved accuracy in part certification and confidence in checking its safety. 1 dwg

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RU 2 150 693 C1

Authors

Ivanov A.I.

Lushchikov V.I.

Dates

2000-06-10—Published

1998-10-02—Filed

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