ML20028B963

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Public Version of Revision 2 to Emergency Plan Implementing Procedure EPIP 350-1, Quick Estimate of Offsite Dose from Unplanned Release
ML20028B963
Person / Time
Site: Zion  File:ZionSolutions icon.png
Issue date: 11/24/1982
From:
COMMONWEALTH EDISON CO.
To:
Shared Package
ML20028B961 List:
References
0038E, 38E, EPIP-350-1-01, EPIP-350-1-1, NUDOCS 8301040171
Download: ML20028B963 (6)
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Text

{{#Wiki_filter:. QUICK EST!. MATE OF OFFSITE 00SE FROM AN UNPLANNED RELEASE ~ EPIP 350-1 TABLE OF CONTENTS PAGE DATE REVISION SECTION TITLE NOV 2 41982 Table of Contents 1 2 2 NOV 2 41982 2 A Purpose B References C Prerequisites O Precautions E Limitations and Actions F Precedure (Includes Table I) 3 NOV 2 41982 1 4 .NOV 2 4 _1982, 1

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. y.. .f..,.;c,, -j;9 :.;.,.. ;. Table III 6 2-18-81 0 7 NOV 2 41982 1 Figure 1 8 NOV 2 41982 1 ( Figure 2 l ~ 8301040171 821220 b PDR ADOCK 05000295 F PDR This procedure contains 8 pages. APPROVED YM 1 0038E 0006A Dm //~ l'VJL

- _. -. ~.. .s_ EPIP 350-1 Rev. 2 NOV 2 41982 Quick Estimate of Offsite Dose From an Unplanned Release A. PURPOSE The purpose of this prececure is to describe the methodology to be followed in order to make a quick estimate of offsite radiation dose from an unplanned release of radioactive gases or liquids. Also included are guidelines for recommended offsite protective actions for the public. s 8. REFERENCES 1) EPIP 330-1 " Classification of GSEP Conditions" 2) EPIP 360-3 " Monitoring High Activity Gaseous Releases during Accident Conditions" C. PREREQUISITES None.,

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.,c,,.,,, O. FRE"AUTIONS This is only a cuick, conservative estimate of the offsite release 1. and is subject to revision pending a detailed evaluation of isotopic mixture and atmospheric or aquatic transport conditicns. ( The wind direction at the site dces not necessarily correspond to the 2. direction of the plume away frcm the site. E. LIMITATIONS AND ACTICNS Operating staff shall take apprcpriate actions to terminate the release. \\ 0038E 2 0006A

EPIP 350-1 Rev. 1 NOV 2 4 582 F. PROCEDURE 1. Determine activity.of erfluent release by any of the following methods: a) Gaseous Releases (1) Use attached calibraticn curves (90% Xe-133/104 Xe-135) for appropriate radiation monitor to convert CPM to uCi/cc. See Figure I or Figure II. s t (2) Request analysis of grab sample and have Health Physics staff quantify release, If ORE 0014 and 1 or 2 RTPR25 are both off scale, then use (3) procedure EPIP 360-3 to convert dose rate (mrem /h) to ? uCi/cc. b) Liquid Releases ~.(1)..In the unlikely event that the appropriate radiation e. .^. ' monitors failed'to is'olats a Lake Discharge tank release.or - -1. release from fire sump contact Health Physics Staff to immediately quantify release. i 2. Calculate the gasecus effluent release by using the following equation: R = AR x RR x T i 10' UCi/Ci where R = Release (C1) AR = Activity of release (uCi/cc) as calculated in Step F.1. ( RR = Release rate (cc/sec) See Table I below T = Time (sec) Note: Use T = 1 to calculate instantaneous release For liquid release: R = AR x Volume RELEASED (cc) 10' uCi/C1 where R = Release (C1) AR = Activity (uC1/cc) TABLE I Release Point No. of fans Release Rate (RR) Auxiliary Building 1 3.16 x 10' 2 6.32 x 10' 3 9.49 x 10' 4 1.26 x 10' 5 1.58 x 10' 6 1.90 x 10' 's, 6.8 x 10* Air Ejector Misc. Vents (ORTPR18) 2.8 x 10' Cent. Purge 1 1.99 x 10' l 0038E 3 0006A t

o..-_ EPIP 350-1 Rsv. 1 NOV 2 4 HM2 PROCEDURE (Ocnt'd) 3. Gay cus Releases: Calculate the estimate of the offsite dose at the site boundary by using the following equation: 00 = DF x R x DCF \\ wnere 00 = Offsite Dose (mrem) R = Release (C1) as calculated in Step F.2 DF = Dose Factor - See Table II DCF = Distance Correction Factor - See Table II NOTE 1) Gaseous releases are vent or ground level releases. 2) Distance Correction Factors at site bcundary is 1.0. ic. > :', _,',. 4.N. ;.L,iguid, Release:.;,. ,,,,..... p,.3.... c.. Calculate t'he estimate of'the offsite dose by using the folicwing ecuaticn: l CD = 0F x R t where 00 = Offsite Oose (mrem) R = Release (C1) as calculated in Step F.2 CF = Dose Factor - Sea table III 5. Use "Offsite Dose" as calculated in Step F.3 and F.4 to recommend I protective action as indicated belcw. f i i Whcle Body (mrem) Thyroid (mrem) Protective Action Gas 1000 5000 Seek snelter 5000 25000 evacuate Liquid 500 1500 Supply alternate source 5000 15000 Isolate /0;arantine l r G. CHECKLISTS j None H. TECFNICAL SPECIFICATION S r::.xENCES e None k-4 0038E 0006A

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