ML20207C499
| ML20207C499 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 12/16/1986 |
| From: | Bailey J GEORGIA POWER CO. |
| To: | Youngblood B Office of Nuclear Reactor Regulation |
| References | |
| GN-1242, NUDOCS 8612300161 | |
| Download: ML20207C499 (12) | |
Text
Southem Company Services, Inc.
Poet Offce Box 282 t"ayneeborr, Georgia 3083o Telephone 404 722-1543 404 722-8943 Vogtle Project December 16, 1986 Director of Nuclear Reactor Regulation File: X7BC35 Attention: Mr. B. J. Youngblood Log:
GN-1242 PWR Project Directorate #4
~ Division of PWR Licensing A U. S. Nuclear Regulatory Commission Washington, D.C.
20555 NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PLANT - UNITS 1 & 2 0FFSITE DOSE CALCULATION MANUAL (0DCM)
Dear Mr. Denton:
In recent discussions with your staff, Georgia Power Company verbally committed to revising some meteorological parameters contained in the Offsite Dose Calculation Manual (0DCM).
The meteorological parameters included in Revision 2 of the Plant Vogtle ODCM will be revised as follows:
1.
Default recirculation values will be utilized for determination of dispersion and deposition factors for calculation of the off-site effect of gaseous effluents.
(
2.
Ground-level release parameters will be used for plant vent l
releases in the east and east-northeast sectors (sectors l
in which the cooling towers are located) to account for any l
potential cooling tower wake effects.
The new meteorological parameters are listed in the attachments to this letter.
These pages will be formally incorporated into Revision 3 of the ODCM, scheduled to be submitted by mid-February 1987.
Georgia Power is taking this action to expedite the licensing process.
i Georgia Power still feels that information submitted in 1984 conclusively l
shows that recirculation parameters are not applicable to Plant Vogtle, and that mixed-mode meteorological parameters are applicable for plant i
vent releases in the above-mentioned sectors.
Georgia Power plans further submittals to justify this position in early 1987.
8612300161 061216 PDR ADOCK 0500 4
[
1 A
l
1 -
Mr. Denton December 16, 1986 Page 2 If your staff requires any additional information, please do not hesitate to contact me.
Sincerely, b.
J. A. Bailey Project Licensing Manager MSH:rbs Attachments xc:
P.. E. Conway NRC Regional Administrator h
A. Thomas NRC Resident Inspector J. ~. Joiner, Esquire D. Feig B. W. Churchill, Esquire R. A. McManus M. A. Miller (2)
L. T. Gucwa B. Jones, Esquire Vogtle Project Files G. Bockhold, Jr.
I (X/Q)g the highest annual average relative
=
concentration at the site boundary.
(If 4
desired, the annual average relative concentration at the site boundary for the particular release point may be used.)
The release points addressed in this Subsection are ground-level releases,
- b. 93 1.73--x 10-5,,ef,3 in the ENE Sector Z
(X/Q)g
=
Kg total body dose factor due to gamma emissions
=
3 from radionuclide 1 (area /yr per uCi/m ) from Table 2.1-1.
rate of release of noble gas radionuclide 1 Ogg
=
(uci/sec) from the vent release pathway under consideration (ground-level), which is the product of Xgy and F, where Xgy is the y
concentration of radionuclide i
for the particular release and F is the maximum y
expected release flow rate for this release point.
(Xgy in uCi/a1 and F in al/sec.)
y D,,
dose rate limit to the skin of the body of an
=
individual in an unrestricted area which is 3000 aren/ year.
relationship between monitor response and the R,
=
i dose rate to the skin for the conditions of 1
the release under consideration.
R, C,*r ((X/Q)g (L + 1.1 M )
Qgg )
M)
=
g g
I 2-5 i
2.2.2.1 Air Doses at or bevond the Site Boundary For the purpose of implementing Technical Specification 3.11.2.2, air doses in areas at or beyond the site boundary shall be determined as follows:-
D,,,,=
air dose due to gamma emissions from noble gas g
radionuclides (arad)
-8
= 3.17 x 10 gy7gI I
I G
1 ig M
i in IIII 2
where i
3.17 x 10-8 = the fraction of one year per one second Qgg cumulative release of noble gas radionuclide
=
i over the period of interest (uci) from the vent release (ground-level) under consideration.
Q, cumulative release of noble gas radionuclide
=
i i over the period of interest (uci) from the vent release (aired-mode) under consideration.
Mi defined previously in Subsection 2.1.1
=
(X/Q)g
,]
defined previously in Subsection 2.1 4 5 x 10~
sec/m3 (X/Q)g in the ENE Sector 2
=
D
=
beta air dose due to beta emissions from noble gas radionuclides (arad).
~0
= 3.17 x 10 (576)g (NgQgg (X/Q)g Ng Qg, (20) 2;
+
2-20
i TABLE 2.2-12 CONTROLLING RECEPTOR (To Support Subsection 2.2.2.2)
The location and exposure pathways associated with the controlling receptors are determined during the annual land use census.
Dispersion and deposition values were calculated based ib VEGP site meteorological data collected for the period February 1,1984 through January 31, 1986.
Sector:
WSW Dist 1.3 mi es Age G Child E-6 sec/m (X/Q')
sec/m Dispersion:
(X/Q') cp =
=
E-9 m (D/Q')MP Deposition:
(D/Q') GP
~
=
Exposure pathways:
Inhalation, ground plane, and vegetation NOTE:
A milk cow was observed during the 1985 Land Use Survey.
The owner indicated that the cow was on an irregular milking cycle, and is dry for long periods of time.
However, because of the potentially significant 4
dose associated with this pathway, dose calculations must be performed during periods in which the cow is being milked for human consumption.
A garden is also present at this location.
Under certain conditions, the individual exposed to these pathways could become the controlling receptor.
The determining factor is likely l
to be the number of months the cow is milked in a year.
Calculated dose results should be compared to the receptor presented above to determine which is the controlling receptor.
Sector:
WNW Distance:
2.8 miles Age group:
Child
/. 3 b G,
3
/. 6 5 3
2 Dispersion:
(X/Q')GP =
v47Ev7 sec/m (X/Q') MP = 4ve5E-7 sec/m o
-2 2'+
-2 Deposition:
(D/Q')GP =
SE-10 m (D/Q')gp = iv&OE-10 m Exposure pathways:
Inhalation, ground plane, vegetation, and milk cow i
- Reference 12; Reference 13 j
^
2-64 i
. ~ - -, - -,. -
TABLE 2.2-15 DISPERSION AND DEPOSIT 0N PARAMETERS (To Support Subsection 2.2.2.3)
Distance Grouttd-Level Release Mixed-Mode Release 3
-2 3
-2 Sector (Miles)
X/O sec/m D/O m X/O sec/m D/O m N
NNE WS EiG F.
6.15
- 1. o S
- t. 58 m,53
- h. 90 SE 3.3 4.70E-7
-3r14E-g 9 5.40E-8 tr19E-10 ;
.s
.i
.s
+.
- r. 2+
SSE 4.6 E-7 1."*E-10
-8 1h64E-ll s.fi
- c. ss t.12 S
4.5
-7
-5Mi!5E-10 ME-8 1.00E-10 I.$$3-7
$.2$E-10 4.$E-8
-I f$E-10 SSW 4.7 I.h25-6 N-[
1.NE-7 N -10 2
SW 3.1 bbE-6 N -9 NM 0.'DE-gi WSW l.3
- 4.. z e
- n. 6 7.41 t.
W 4.2
-Sv43E-7 E-10 fv41E-8
-h40E-10 z.o3 s. a. 7 x
.z.16 3.so WNW 2.3
-lv2eE-6
-7,96E-N '
-1.-35E-7
-5h-39E-10 s.ss a
- i. ss 2 44 2.8 Sv4-7E -7'G E-10
-1 rGSE-7
-1 r86E-10
- 7. u
- 3. n.
- 1. g s
- i..u NW 3.9
-Sve-3E-7 3.055-10
-7,-1 9 E - 8
-lve2E-10 I
NNW Savannah River Plant property (closed to public)
No receptor identified within five miles Reference 12; Reference 13.
E 2-71
Th southern Company servces. Inc.
Post Offee Box 282 Caynesboro. George 30830 6
Telephone 404 7221543 4o4 722-8943 A
Vogtle Project December 16, 1986 Director of Nuclear Reactor Regulation File: X7BC35 Attention: Mr. B. J. Youngblood Log:
GN-1242 PWR Project Directorate #4 Division of PWR Licensing A U. S. Nuclear Regulatory Commission Washington, D.C.
20555 NRC DOCKET NUMBERS 50-424 AND 50-425 CONSTRUCTION PERMIT NUMBERS CPPR-108 AND CPPR-109 V0GTLE ELECTRIC GENERATING PLANT - UNITS 1 & 2 0FFSITE DOSE CALCULATION MANUAL (0DCM)
Dear Mr. Denton:
In recent discussions with your staff, Georgia Power Company verbally committed to revising some meteorological parameters contained in the Offsite Dose Calculation Manual (ODCM).
The meteorological parameters includeri in Revision 2 of the Plant Vogtle ODCM will be revised as follows:
1.
Default recirculation values will be utilized for determination of dispersion and deposition factcrs for calculation of the off-site effect of gaseous effluents.
2.
Ground-level release parameters will be used for plant vent releases in the east and east-northeast sectors (sectors in which the cooling towers are located) to account for any potential cooling tower wake effects.
The new meteorological parameters are listed in the attachments to this letter.
These pages will be formally incorporated into Revision 3 of the ODCM, scheduled to be submitted by mid-February 1987.
Georgia Power is taking this action to expedite the licensing process.
Georgia Power still feels that information submitted in 1984 conclusively shows that recirculation parameters are not applicable to Plant Vogtle, l
and that mixed-mode meteorological parameters are applicable for plant vent releases in the above-mentioned sectors.
Georgia Power plans further submittals to justify this position in early 1987.
T'B Mr. Denton December 16, 1986 Page 2 If your staff requires any additional information, please do not hesitate to contact me.
Sincerely, N
J. A. Bailey Project Licensing Manager MSH:rbs Attachments xc:
R. E. Conway NRC Regional Administrator R. A. Thomas NRC Resident Inspector J. E. Joiner, Esquire D. Feig B. W. Churchill, Esquire R. A. McManus M. A. Miller (2)
L. T. Gucwa B. Jones, Esquire Vogtle Project Files G. Bockhold, Jr.
N.
(X/Q),
ehe hi, hest annua 1 avers,e reistive
=
concentration at the site boundary.
(If desired, the annual average relative concentration at the site boundary for the particular release point may be used.)
The release points addressed in this Subsection are ground-level releases.
b.13 1.73 x 10-5,,ef,3 in the ENE Sector Z
(X/Q)g
=
K i total body dose factor due to gamma emissions
=
3 from radionuclide 1 (area /yr per uCi/m ) from Table 2.1-1.
Qig rate of release of noble gas radionuclide i
=
(uci/sec) from the vent release pathway under ccnsideration (ground-level), which is the product of Xg, and F,, where X, is the 1
concentration of radionuclide i
for the particular release and F, is the maximum expected release flow rate for this release point.
(X, in uCi/al and F in al/sec.)
i y
D,,
dose rate limit to the skin of the body of an
=
individual in an unrestricted area which is 3000 area / year.
R, relationship between monitor response and tfie
=
dose rate to the skin for the conditions of 1
the release under consideration.
R, C,
- ((X/Q)g (L + 1.1 M )
Qgg)
(4)
=
g t
2-5
A.,
2.2.2.1 Air Doses at or bevond *.he Site Boundary For the purpose of implementing Technical Specification 3.11.2.2, air doses in areas at or beyond the site boundary shall be determined as follows:-
Dgg,,,=
air dose due to gamma emissions from noble gas radionuclides (arad) 3.17 x 10-8 gy7gI E
I I
"i in IIII
=
G i
ig M
2 where 3.17 x 10-8 = the fraction of one year per one second Q ig cumulative release of noble gas radionuclide
=
i over the period of interest (uci) from the vent release (ground-level) under consideration.
I2,
1 cumulative release of noble gas radionuclide
=
i over the period of interest (uci) from the vent release (aired-mode) under consideration.
Mi defined previously in Subsection 2.1.1
=
(X/Q)g defined previously in Subsection 2.1.1
=
I.25x10~
sec/m3 (X/Q)g in the ENE Sector 2
=
D
=
beta air dose due to beta emissions from noble gas radionuclides (arad).
-8 g6
= 3.17 x 10 gg/OI N
g 6g, (20)
(X/Q)M N
+
G gg 2-20
---.-.y
.,., -. - -. -.-+.
,--,--.----,---,_....v,
.,.m,-_.----,-
-,-----,-,-.---,,-,r..,.....
- e. --.-
N.4
>4 TABLE 2.2-12 CONTROLLING RECEPTOR (To Support Subsection 2.2.2.2) 1 The location arid exposure pathways associated with the controlling receptors are determined during the annual land use census.
Dispersion and deposition values were calculated based ib VEGP site meteorological data collected for the period February 1,1984 through January 31, 1986.
Sector :
WSW Dist n 1.3 mi es Age Grou -
Child Dispersion:
(X/Q')g, =
-6 sec/m (X/Q')
sec/m
=
Deposition:
(D/Q ') gp=
E-9 m (D/Q ' ) ' P
~
M Exposure pathways:
Inhalation, ground plane, and vegetation NOTE:
A milk cow was observed during the 1985 Land Use Survey.
The owner indicated that the cow was on an irregular milking cycle, and is dry for long periods of time.
However, because of the potentially significant dose associated with this pathway, dose calculations must be performed during periods in which the cow is being milked for human consumption.
A garden is also i
present at this location.
Under certain conditions, the individual exposed to these pathways could become the controlling receptor.
The determining factor is likely to be the number =of months the cow is milked in a-year.
Calculated dose results should be compared to the receptor presented above to determine which is the controlling receptor.
l Sector:
WNW Distance:
2.8 miles Age group:
Child
/. 3 0 6
3 465 3
Dispersion:
(X/Q')GP =
E 8 sec/m (X/Q')MP =
sec/m 2
-2
-2 Deposition:
(7Q' ) gp =
E-10 m (D/Q' ) MP =
E-10 m Exposure pathways:
Inhalation, ground plane, vegetation, and milk cow
- Reference 12, Reference 13 2-64 1
E
7-(W s
m TABLE 2.2-15 DISPERSION AND DEPOSITON PARAMETERS (To Support Subsection 2.2.2.3)
Distance Ground-Level Release Mixed-Mode Release 3
-2 3
D/0 m-2 x/O sec/m D/0 m Sector (Miles)
X/O sec/m N
NNE NE ENE E
ESE
- 7. o S
- t. 52
- h. 90 6.15 N
5.405-8 tr19E-10 SE 3.3 4.705-7 3.12
.ldf
.i. i s
+.
- r. n 1.""
4
-8 fr64E-ll s.If:-10 SSE 4.6
-7 C.
S
- t. i.2 S
4.5
-7
-2.,ME-10
+r6+E-8
-10 SSW 4.7 a.
00-7 2.20E-10
,.J,55-8
-10 L..s 1
- s. o s
}. go M -6 N-[
-lM-7 M -10 2
SW 3.1 bNS-6 N -9 N -76 4 53 g
_g b
WSW l.3 (e. 2 9 3.36
- 1. 4-1
/.
W 4.2
-Gr4GE-7
-2 r413-10 641E-8
-10 I J-. o 3 a.zr a
1.16 3.
s WNW 2.3 trE6E-6
-7,46E-lf '
l r-35E-7
-ih-3&E-10 i. s to a
- i. ss 2.s 4 2.8 4,4-7-E-# 6
-10
-1 r65E-7
-1 rBGE-10
- 7..tr 37.2.
- 7. y S
/..z,s NW 3.9 5.035-7
-3ve5E-10 fr&4E-8
-1,4&E-10 i
l NNW l
I l
Savannah River Plant property (closed to public)
No receptor identified within five miles Reference 12; Reference 13.
I 2-71 l
.___-