ML20094R831

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Forwards Revised Offsite Dose Calculation Manual,Reflecting Resolution of NRC 840508 Questions on Draft Manual.Specific Responses Encl
ML20094R831
Person / Time
Site: Fermi DTE Energy icon.png
Issue date: 07/25/1984
From: Jens W
DETROIT EDISON CO.
To: Youngblood B
Office of Nuclear Reactor Regulation
Shared Package
ML20094R836 List:
References
EF2-69216, NUDOCS 8408210079
Download: ML20094R831 (4)


Text

V\\.

Wayne H. Jens Vice Presiont Muclear Operatens

- Fermi-2 6400 North Dme H ghway IENe$$"

July 25, 1984 EF2-69216 Director of Nuclear Reactor Regulation

' Attention:

Mr. B. J.

Youngblood, Chief Licensing Branch No. 1 Division of Licensing U.

S.

Nuclear Regulatory Commission Washington, DC 20555

Dear Mr. Y ungblood:

o References (1) Fermi 2 NRC Docket No. 50-341 (2) NRC Letter to Detroit Edison, " Review of Fermi-2 ODCM" May 8, 1984 (3) Detroit Edison Letter To NRC, "Resubmittal of Draft Offsite Dose Calculation Manual",

EF2-67213, February 6, 1984

Subject:

Revised Offsite Dose Calculation Manual Reference 2 provided several questions on the Fermi 2 Offsite Dose Calculation Manual (ODCM) which Detroit Edison provided via Reference 3.

The subject ODCM has subsequently been revised to reflect the resolution to these questions and is provided as Attachment 2.

Specific responses to the Reference 2 questions are provided in Attachment 1.

Should you have any additional questions, please contact Mr. Keener Earle (313) 586-4211.

Sincerely, b

Enclosurec 4((7 cc:

P. M. Byron

  • M.

D. Lynch

  • J. Nehemias*

USNRC, Document Control Desk,*

Washington, DC 20555

  • With Attachments 8408210079 840725 PDR ADOCK 05000341 f ()CC P

PDR I\\l

Attochosat 1:

Reopomoeo to NRC Coecorea Subject NRC Comment Detroit Edison Response 1.

Liquid Radiation Detroit Edison has designated Figure 1.4-1 was revised to:

Monitor the monitor at the circulating identify N402 as the proper' (Figure 1.4-1) water reservoir decant line as monitor.

l DilN402 (Table 3.3.7.11-1 of DECO's RETS), whereas it has been designated as Dil-N042 in the ODCM.

Indicate which one is correct.

l 2.

Gaseous Setpoint DECO has not addressed the dose The " stack" of Regulatory i

Calculation contribution from the finite elevated Guide 1.109 must exceed 80 (Page 2.0-2) plume from, for example, the reactor meters in height.

Fermi 2 building stack.

does not have any stack release points using this definition (i.e.,

height).

l 3.

Gaseous Effluent DECO has not considered the finite Refer to Item 2 above..

Dose Calculation elevated plume in the gaseous (Page 2.0-6) dose and dose rate calculations.

4.

Dose to An DECO has not included I-133 in Section 2.2.2.b (page 2.0-10)-

Individual in the dose calculation.

of the ODCM has been revised Unrestricted Area to reflect the inclusion of (Page 2.0-8, all radioiodines (not just Equation 10)

I-131) in this dose calcu-lation.

5.

Dose to An DECO has not provided methodology The derivation of Ri (now Individual in and site-specific parameters identified as Raipj) has Unrestricted Area for the derivation of Rt been provided in Section (Page 2.0-8) 2.2.2.b.

Page 1 of 3 1

n Subject NRC Conannt Detroit Edinan Rnnpseen 6.

Dose Factors DECO referenced NUREG-0133 as the Regulatory Guide 1.109 indi--

(Table 2.2-1) source for the P values.

However, cates that the producteof the NUREG-0133 specifies the infant, child's breathing rate and not child, as the critical receptor.

dose factor exceeds that of-Indicate how DECO will demonstrate the infant and is, therefore, that a child is a more critical the critical receptor.

This-receptor group.

is also'in accordance with the Bases discussion of Fermi 2 Technical Specification 3/4.11.2.1.

7.

Dose Factors DECO has not considered the grass-Section 2.2.2.d presents the (Table 2.2-2) cow-meat, vegetation ingestion, and methodology that would-be used-grass-cow-milk pathways.

DECO should in assessing these pathway provide justification why an infant contributions should a is considered as the critical age subsequent land use census

group, determine these analyses are required.

The highest potential dose due to all applicable gaseous dose pathways at Fermi 2 is to the infant age group.

Therefore, the infant age group is desig-nated as the critical receptor for gaseous effluents.

8.

TLD Stations DECO has committed to 37 TLD

. Table 3.0-1 now. reflects 37 (Figure 3.0-3 locations (see Table 3.12.1-1 of locations where " direct and RETS), whereas there are only 30 radiation" measurements are Table 3.0-2) locations provided in the ODCM.

taken via_a TLD.

Figures DECO should explain this discrepancy.

3.0-1, 2 and 3 have similarly been revised to reflect the 37 TLD stations.

9.

Monthly Liquid DECO has not provided the metho-Section 1.2.3 provides the Dose Projections dology and parameters for monthly methodology for determining an dose projection in accordance with individual monthly liquid dose the commitment made in DECO's RETS projection.

Specification 4.11.1.3.1.

Page 2 of 3

Snbjact NRC Cecnsat Datreit Ediron Rnnpsnar).

10.. Monthly Gaseous DECO has'not provided1the metho- '

Section 2.2.3 provides the Dose Projection dology and parameters for monthly methodology for determiningani i

dose projection in accordance with-individual monthly gaseous ~

l commitment made in DECO's RETS

. dose projection.

Specification 4.11.2.5.1.

11.

Total Dose DECO has not addressed the metho-Section. 4.0_provides the.

dology to calculate the. total-doses methodology for calculating-from uranium fuel cycles in accor-the-total dose from the-dance with RETS Specifications uranium fuel cycle.

This 4.11.4.1 and 4.11.4.2.

Also,

. discussion' encompasses.the methodology is not provided for calculation of direct calculation of direct ra d ia t i o n radiation exposure.

exposure.

12.

Interlaboratory DECO has not addressed the inter-Section 3.2 has been'added to Comparison laboratory program in accordance address the-Interlaboratory.

Program with RETS Specification 4.12.3.

Comparison Program.

r 4

Page.3 of 3

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