ML20098B538

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Slide Presentation Entitled, Hydrogen Source Term for BWR Degraded Core Accidents
ML20098B538
Person / Time
Site: River Bend Entergy icon.png
Issue date: 06/29/1983
From: George Thomas
ELECTRIC POWER RESEARCH INSTITUTE
To:
Shared Package
ML20093C471 List:
References
NUDOCS 8409260147
Download: ML20098B538 (42)
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Text

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l-i HYDROGEN SOURCE TERM FOR BWR DEGRADED COPI ACCIDENTS i

i 1

BY GARRY R. THOMAS NUCLEAR SAFETY ANALYSIS CENTER NUCLEAR POWER DIVISION ELECTRIC POWER RESEARCH 15STITUTE PALO ALTO, CALIFORNIA; USA i

PRESENTATION TO U.S. NUCLEAR REGULATORY COMMISSION

3ETHESDA, MARYLAND i

29 Juts 1983 k

8409260147 840910 PDR ADOCK 05000458 G

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CORE DEGRADATION PROGRESSION CHARACTERIZED BY:

e RELATIVELY SLOW INITIAL HEATUP RATES WITH STEAM COOLING

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e LATER DOMINANCE OF ZIRCALOY OXIDATION EXOTHERMIC ENERGY RELEASE

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e SPATIAL DISTRIBUTION e DAMAGE SEVERITY e

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e DETAILED BWR CORE HEATUP CODE DEVELOPED PRODUCTION RATES COMPLETED e SCOPING STUDY OF H2 e. PEAK CORE PRODUCTION RATES (g 1.5 tsM/SEC)

OCCUR FOR SHORT PERIODS (4-1 MIN) AT INITIATION OF ECCS OPEPATION e

SUSTAINED CORE PRODUCTION. RATES. (( 10 MINUTES)

FOR ALL CASES RANGE OVER 0.5-0.8 tsM/sec THESERATESAREATCORE-ACIUALPEAKRATESTO e

TO DRYWELL/WETWELL WILL BE LOWER (MUTED) AS A RESULT OF PRIMARY SYSTEM THERMAL HYDPAULICS t

GRT 6/83 g

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