ML20081B780
| ML20081B780 | |
| Person / Time | |
|---|---|
| Site: | Vermont Yankee File:NorthStar Vermont Yankee icon.png |
| Issue date: | 03/05/1984 |
| From: | Sinclair J VERMONT YANKEE NUCLEAR POWER CORP. |
| To: | Vassallo D Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20081B782 | List: |
| References | |
| FVY-84-17, NUDOCS 8403120003 | |
| Download: ML20081B780 (5) | |
Text
_ _ _ _ _ _ _ _ _
VERMONT YANKEE NUCLEAR POWER CORPORATION RD 5. Box 169 Ferry Road, Brattleboro, VT 05301 nEPty ro-y March 5, 1984 ENGINEERING OFFICE v
FVY 84-17 1671 WORCESTER ROAD FRAMINGHAM, MASSACHUSETTS 01701 TELEPHONE 617-872 8100 United States Nuclear Regulatory Commission Washington, D. C. 20555 Attention:
Office of Nuclear Reactor Regulation Mr. Domenic B. Vassallo, Chief Operating Reactors Branch No. 2 Division of Licensing
References:
(a) License No. DPR-28 (Docket No. 50-271)
(b) Letter, VYNPC to USNRC, Propoced Change No. 78, Supplement 1 to Facility Operating License No. DPR-28, dated January 23, 1984 (c) Letter, VYMPC to USNRC, FVY 83-127, dated December 27, 1983
Subject:
Vermont Yankee Off-Site Dose Calculation Manual (ODCM)
Dear Sir:
By Reference (b), we provided you with our Radiological Effluent Technical Specifications (RETS). Enclosed please find the associated Off-Site Dose Calculation Manual (ODCM), which will be used to implement several provisions of the RETS. details our responses to questions posed by your consultant Franklin Research Center (FRC), which resulted from their review of a draft version of the ODCM. Enclosure 2 is our final ODCM.
We trust that this information is satisfactory; however, should you have any questions, please contact us.
Very truly yours, VERMONT YANKEE NUCLEAR POWER CORPORATION J. B. Sinclair Licensing Engineer
'JBS/cle Enclosures OR 8403120003 840305 DRADOCK05000g7}
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l ENCLOSURE 1 RESPONSES TO FRANKLIN RESEARCH CENTER (FRC)
COMMENTS ON VERMONT YANKEE (VY) DRAFT ODCM Pane No.
FRC Comment 1-4
" Spec. 3.8.G.1 should also include I-133."
VY Response The method includes 133I as well as 135 The title I
or description indicating 131I was incorrect and has been changed.
FRC Comment 1-4
" Spec. 3.8.H is in q.'stion.
Since the Advance Off Gas (AOG) System is to operate whenever the main condenser Air Ejector System is in operation, the dose projection method is not valid or needed."
VY Response We agree the dose projection method is not required for Technical Specification 3.8.H.
A new section, 3.8.I, for Ventilation Exhaust Treatment, does reference the ODCM.
FRC Comment 4
1-6 "Last line should read 2 x 10-4 but not 2 x 10."
VY Response We agree. This is a typographical error.
1-8 FRC Comment
" Equation 3-6 should also include I-133."
VY Response We agree. See response to comment on Page 1-4.
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d Pane No.
FRC ' Connect' ;
1-15 "How the effective average gaasna dilution factor, (I/QY) is defined? How is it different froni'(I/Q)?
VY Response The concept of an energy dependent effective ganma dilution factor has been used by Yankee Atomic Electric Company for seven years.
Its description is fully described in YAEC-1120 AEOLUS, John N. Hamawi, dated January 1977. A copy of this report was previously l
submitted to you.
FRC Conunent
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~2-3 "Section 2.2.2 (Service Water Pathway). Since Licentee's service water monitor does not have an LLD specified (See proposed RETS Table 4.8.1), there seems to *ve a loophole by setting three' times the background as the setpoint for such a monitor. A continuous composite sampling is L
desirable in Licensee's RETS Table 4.8.1."
yY Response The choice of three times background appears to be a reasonable choice for a monitor in an area of varying background counting rates. There is no continuous composite sampler for the normally clean service water pathway; therefore, no requirement for inclusion in the ODCM.
FRC Comment 2-4
" Licensee indicated that circulation water will be sampled if ti.e process monitor (17/359) is out of service or if the alarm sounds. Again, a continuous composite sampling is recommended for inclusion in Licensee's RETS Table 4.8.1."
VY Response E
There is no continuous composite sampler in the Circulating Water System. No requirement exists for the ODCM.
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FRC Comment Page No.
<<" Define D ' finite; whab-is the basis for Eqn. 3-107 Y
f 3-20 V'l Response f
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See response o comment of Page'l-15.
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3 not given."
3'-21 "BasisforX[Q$h 7.2 x 10-7 sec/m i
s s
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s W Resportse The basir for this value is described in Section'3.10.
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FRC Coassent\\'
1 q-
" Sect' ion 3.6 I-133 should be included.",
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3-22
>s W Response '
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See response to comment on Page'1-4.
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FRC' Comment
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" Site specific critical organ due factor (Table 1.1-12 on 3-23 Page 1-20).
Licensee has not provided pathways, critical Note recept'oes assumptions and equt.tions for the' data.
the approaches between Section 3.4 (Noble g,ases) and Section 3.6 (I+P) are entirely differant! For I+P, only
' ' inhalation pathway needs to be considered'for dose rate calculations.
I-133 should also be included."
W Response s
.The basis for the site-specific critical cegan dose factors are given in Section 3.9.3 and Sectica 3.6.3.
We recognized.the difference in the I+P dose factors and feel our approach is more nearly correct.
?"'.J Conunent 3-24 "I-133 sh;uld also be included."
1 W Response
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s s
See response to comment on Page 1-4.
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FRC Comment Pane No.
'3-40 "Since Reference (b) (AEOLUS Code - YAEC-1120 January 1977) is not available to the reviewers, Y
verification is needed for the approach cited for X/Q."
VY Response See response to comment on Page 1-15.
FRC Comment Figure 6-2
" Hydrogen monitor (s) not designated in Figure 6-2."
VY Response You are correct. The hydrogen monitor has been added to Figure 6-2.
s s.
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