ML19289E653

Forwards Revised Version of App G to Emergency Plan Re Dose Distance Plots

ML19289E653
Person / Time
Site:	07001113
Issue date:	04/19/1979
From:	Kaplan A GENERAL ELECTRIC CO.
To:	Crow W NRC OFFICE OF NUCLEAR MATERIAL SAFETY & SAFEGUARDS (NMSS)
References
NUDOCS 7905220025
Download: ML19289E653 (10)

Text

s S DOCUMENT CONTAINS POOR QUAUTY PAGES GENtHALvg ELECTRIC NUCLEAR ENERGY PRODUCTS DIVISION WILMINGTON MANUF ACTURING CEPANEW CASTLE H AYNE RO AD. P. O. BOX 780. WLMINGTON, N. C. 28401. (919) 343-5000 April 19, 1979 Director Office of Nuclear 1!aterial Safety & Safeguards

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U. S. Nuclear Regulator' Connission Washington, D. C.

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'l l N> p y.- g Attention: 51r. W. T. Crow, Section Leader g

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M Uranium Fuel Fabricaticn Section Fuel Pmcessing & Fabrication Branch A O,," g.,g7g:> d' f Division of Fuel Cycle & 11aterial Safety W

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Dear Sir:

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Refemnces:

(1) NRC License SN W 1097, Docket #7n 1111 jY '

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(2) Letter, J. B. Martin to A. L. Kaplan, 2/27/78 J'

(3) Letter, A. L. Kaplan to J. B. 5!artin, 8/28/78 (4) Letter, W. T. Crow to A. L. Kaplan, 11/10/78 (5) Letter, A. L. Kaplan to W. T. Crow, 11/27/78 (6) Letter, A. L. Kaplan to W. T. Crow,1/9/79 (7) Letter, A. L. Kaplan to W. T. Cmw, 2/27/79 (8) Letter, A. L. Kaplan to W. T. Crow, 2/28/79 (9) Letter, A. L. Kaplan to W. T. Crow, 4/4/79

Subject:

DIERGENCY PLAN With reference to activities authorized by ST!-1097, General Electric Ccepany sutmitted a copy of the T.'D Emergency Plan for your review on 1/9/79 pertaining to the GE fuel fabrication plant in Wilmington, N. C.

As a result of your reviaw, several questions nern raised ccacerning plan content, and answers were submitted (references 7 and 8).

Since that time, further questiens have teen raised related to the dose-distance plots in Appendix G of the Energency Plan. There questions have been addressed and answered in the revised version of Appendix G, a copy of which is er. closed for your incorporation into our emergency plan.

General Electric personnel neuld be pleased to discuss this plan further with you and your staff as you may dean necessary.

Very truly yours,

/h l,'

GT.RAL ELECITIIC (DMPANY

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f Arthur L. Kaplan, Enager Licensing & Cccpliance Audits ALK:trw M/C J26 Attach"ents

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J. B. Kahle, NRC-Atlanta D. J. Perw t ti. NPC-Atlanta 790522009 T, NSD-L

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SECTI0tl TITLE PAGE 9.0 RECOVERY 42 9.1 REENTRY 43 9.2 RESUMPTI0ft OF OPERATIONS 43 9.3 TERMIllATI0tl 0F 0FFSITE EMERGEtlCY AtlD RECOVERY 43 10.0 APPEtlDICES 41 A

LETTERS OF AGREEMENT 45 B

IMPLEMErlTING EMERGENCY PROCEDURE LIST 57 C

EMERGEtlCY EQUIPMEtlT CATEGORIES 61 0

EMERGENCY DIRECTOR DELEGATI 0tl LETTER 64 E

SUPPORT AGENCY EMERGEilCY PLAN LIST 66 F

SITE PLAft - WILMINGT0tl MAtlUFACTURING DEPARTMENT 68 G

FOSES FR0tt CRITICALITY & UF6 RELEASE ACCIDENTS 70

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LISTIllG OF FIGURES FIGURE TITLE PAGE 3

2.1 PLANT SITE, STATE Ai10 COUNTY LOCATI0 tis 2.2 PLANT SITE, NEW HANOVER COUNTY AND ADJACENT COUtiTIES 4

SITE liAP OF THE WILMIfiGTON MAtlVFACTURIllG DEPARTMEitT 69 GRAPH - TOTAL BODY GAMi1A DOSE (REtti 72 GRAPH - BETA DOSE TO skirl (REM) 73 GRAPH - ADULT THYR 0ID DOSE C0f41ITi1EilT (REf1) 74 GRAPH - PR0tiPT GA!'MA DOSE OR PROMPT flEUTR0il DOSE (REM) 75 iV

APPE:1 DIX G DOSES FR0f4 CRITICALITY a UF GAS RELEASE ACCIDEllTS g

DOSE / DISTANCE PLOT - CRITICALITY ACCIDENT Interoretation of Dose / Distance Plot Plots showing the projected wholebody dose from a criticality accident are shown in the accompanying figure.

Some of the assumptions used in determining these plots are as follows:

18

1) The accident results in 10 fissions.

2) The initial fission product inventory is zero.

Only the volatile noble gases and icdines are considered to be released.

3) Dose estimates include a contribution from an individual's sub r.ersion in a semi-infinite cloud of gamma emitte rs and from the direct radiation from the ac ident (prompt neutrons and gamma rays).

4) Direction of the cloud is assumed to be toward the closest site boundary (122 m), southern direction.

These dose / distance plots should not be interpreted to give actual estimates due to the conservative nature of uany of the assumptions and calculations.

Actual expected doses should be much less.

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DOSE TABLE - UF RELEASE g

fiAXIMUf1 IflHALATIO!! DOSE COMf1ITf1EflT TO Afl li!DIVIOUAL AT THE flEAREST SITE BOUf!DARY RESULTIllG FR0f1 ACCIDEflTAL RELEASE OF URAtlIUf1 HEXAFLUORIDE*

Dose Commitment 0 roan (ren)

Lung 3.16 Bone 1.06 Kidney 0.176 Stomach 2.47 x 10-5 Small Intestine 3.16 x 10-II Upper Large Intestine 1.24 x 10-8 Lower Large Intestine 9.15 x 10-8

• Instantaneous release from a 30" cylinder containing 4,800-lbs of uranium hexafluoride It should be recognized that there is an eierent of conservation in these accident calculations because of the nature of the materials involved.

The postulated release would be in the fom of HF and U0 F, both of which would be expected to be visible as a white cloud.

Hydrogel fluoride, in particular, is very irritating to the lungs and mucous trembranes, hence, the natural reaction when exposed to this material is to hold one's breath and run from the cloud.

Thus, it is extremely unlikely that any individual would be exposed to the cloud for any length of time.

An exposure on the order of a few minutes would be most likely for an individual standing relatively close to the site boundary when the postulated incident occurred.

Hence, the actual maximum dose commitments are likely to be a factor of 10 to 100 lower than those calculated.