ML17037B669
| ML17037B669 | |
| Person / Time | |
|---|---|
| Site: | Nine Mile Point  |
| Issue date: | 11/01/1976 |
| From: | Rhode G Niagara Mohawk Power Corp |
| To: | Lear G Office of Nuclear Reactor Regulation |
| References | |
| Download: ML17037B669 (22) | |
Text
U.S. NUCLEAR REGULATORV C VIISSION NRC I'ORM 195 I2 7G)
NRC DISTRIBUTION FoR ART 50 DOCI(ET MATERIAL DOCKET NUMBER 50>>220 FI LE NUMBER Mr. George Lear FROM:
Niagara Mohawk Power Corp.
- Syracuse, New York Mr. Gerald K. Rhode DATE OF DOCUMENT 11176 DATE RECEIVED 11 5 76 NfLETTER fgfoR IG INAL Ocopv DESCRIPTION QNOTORIZED A@UNCLASSIFIED PROP INPUT FORM ENCLOSURE.
NUMBER OF COPIES RECEIVED One signed ree copies encl recvd.
Ltr. w/attached.
~.re our 9/29/76 1'tr.. ~
trans the following:
Nine Mile Site Combined Annual Grazing Seas'on and Monthly Wind Roses for 1974 and 1975-Pasquill Stability Classes 30, 100 and 200 Foot Levels~
(to-P)
(300-P)
PLANT NAME:
Nine Hile Point Unit 81 ACKNOWLEDGED DO NOT REMOV@
SAFETY QSQT&'M%A /DE BRANCH CHIEF:
PROJECT
)IANAGER:
LIC ASST Lear Nowicki Parrish FOR ACTION/INFORMATION ASS C'NF.D AD ~
PRO E
IANA 11 5 76 IEB FILE INTERNALDISTRIBUTION SYSTEMS SAFETY SITE A
NRC PDR OELD GOSSICK & STAFF MIPC CASE
)IANAUER HEXNEHAN
'CHROEDER ENGINEERING MACCARRY KNIGHT SIHWEIL PAWLXCKX BENAROYA I
IPPOLITO K RKWOO OPERATIN REAC 0 S
WXKJ'
~ N FNV RO ECT IIANA.EIIEN BOYD P
COLLINS HOUSTON PETERSON MELTZ IIEI.TEHES SKOVIIOLT LPDR:
Oswe o
N.Y.
TIC:
NSIC:
ASI.B
'CRS CYS IIOI.DING/.
NIIC FOIIM IOB I2 MI REACTOR SAFE'IIY ROSS NOVAK ROSZTOCZY CHECK AT & I SALTZIIAN RUTBERG EXTERNAL DISTR II3UTION NAT IAB:
BEG ~ VIE LA )DR CONSUI.TANTS EN
'XSENII SHAD BUTI,ER
.RIMES BROOK))Ag~Q~
ULRIKSON{ORNA LL51E UHCI OLLIN CONTROL NUMI)LR rimWS
I 0 ~
(
l
'\\
~
~
l
NIAGARA MOHAWK POWER CORPORATION NIAGARA~
MOHAWK 300 KRIK BOULKVAROWKST SYRACUSC, N.Y. I3202 November l, l976 Director of Nuclear Reactor Regulation Attn:
Mr. George Lear, Chief Operating Reactors Branch ¹3 U. S. Nuclear Regulatory Commission washington, D. C.
20555 Re:
Nine Mile Point Unit l Docket No. 50-220 DPR-63
Dear Mr. Lear:
Your letter dated September 29, l976 requested additional information regarding compliance of Nine Mile Point Unit l wi th 10CFR50, Appendix'.
Provided 'herewi th is our response to this request.
Very truly yours, NIAGARA MOHAWK POWER CORPORATION
~gqt
'GM/sz Attachment GERALD K. RH DE Vice President - Eng'neering IIOCIIntp QSIlgq 8-2.
// 574~
~ S. IIIICI~~<II~~
'Sd)M)EX'eII ro
4 4
l I't J
~
r
'fq
guesti on l (Bl)
Provide the joint frequency distribution of wind speed and direction by atmospheric stability class (Tables Bl-5 through Bl 9) such that:
l) the atmospheric stability classes are as defined in Regu-latory Guide l.23 and include Classes A through G; and 2) calms are not included in the 0-3 mph wind speed class, but rather're listed separately for each page of these tabl es.
R~es nse Joint frequency distributions of wind speed and direction by Pasquill Classes A through G in accordance with the atmospheric stability classes listed in Regulatory Guide l.23 are given for the 30-ft., l00-ft. and 200-ft. levels in Attachment l.
All data are from the Nine Mile Site meteorological tower for l974 and l975.
The 200<<ft. and 30-ft. distributions are presented in response to the Nine Mile Point Unit l request and the l00-ft. distributions are presented in response to the James A. FitzPatrick Nuclear Power Plant request.
I'n addition to the individual stability classes, an all sta-
~bilit wind rose, and a direction versus s eed wind rose follow each distri bution by time period.
Calm hours are not included in the one to three mile per hour wind speed class, but are listed by each stability class.
The joint frequency distribution of wind direction and speed by Pasquill stability classes for the combined years l974 and l975 for the 30-ft. level is given in Table l.
Table 2 shows the distribution foz the l00-ft. level and Table 3 for the 200-ft. level.
Tables 4, 5 and 6 give the combined grazing season wind roses by Pasquill stability classes for the'0-ft.,
l00-ft. and 200-ft. levels, respectively.
Combined monthly stability wind roses for the 30-ft. level are presented in TaMe 7, for the l00-ft. level in Table 8, and for the 200-ft.
level in Table 9.
r p
Question 2 (2)
The stability classes on pages l0, ll, and l2 of Table B2-3 appear mislabeled.
Please correct.
R~es ense The tables were mislabeled; corrected tables are included in this resporise.
l'n addition, it was necessary to correct page 9 of Table B2-3, which is attached.
The Star program for 1967 combined Classes 8 and F and are so noted on the corrected tables.
Annual ATMOSPHERIC STABILITY FROM STAR PROGRAM FOR SYRACUSE 1967 Nine Mile Point Nuclear Station - Unit 2 Niagara Mohawk Power Corporation Fre uenc Distribution Station
~ Syracuse N.Y. 1/67-12/67 Direction N
NNE hE ENE E
ESE SE SSE WSW AVG 1-3 17 14 12 2.7 4 - 6 19 25 36 17 26
, 13 10 10 12 12 16 1
7-10 30 13 18 24 17 12 8.3 Speed (Kts) 11 16 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0"
0
- 0. 0 17 21 0
0 0
0 0
0 0
0 0
0 0
0 0
0 0
0. 0 Greater than 21 0
0 0
'0
- 0 0
0 0
0 0
0 0
0 0
0.0 Avg Spd 6.2 4.9 4.6 5.5 5.5 5.0 4.8 5.1 5.4 5.5 6.0 6.2 7.3 6.4 6.6 6.1 5.3 Total 33 v ~
34 116 85 54 26 22 34 37~
32 31 TOTAL 88 343 173 0
0
.0 NEER OF OCCURRENCES OF E AND F STABILITIES ~ 645 NUMBER OF CALM WITH E AND F STABXLXTIES ~ 41 Page 9 of 12
t
Annual ATMOSPHERIC STABILITY PROM STAR PROGRAM FOR SYRACUSE 1967 Nine Mile Point Nuclear Station - Unit 2 Niagara Mohawk Pover Corporation Relative Fre uenc Distribution Station
~ Syracuse N.Y. 1/67-12/67 Direction N
NE ENE ESE SE SSE SSW SW WSW 0-3 0.001742 0.000537 0.001792 0.001938 0.008615 0.007133 0.005668 0.002427 0.003469 4-6 0.006500 0.001711 0.003079 0.008553
'.023606 0.019843 0.012316 0.005816 0.008895 0.001172 0.002573 0.001449 0.001515 0.001515 0.004447 0.003421 0.003421 0.004105 0.004105 0.001645 0.005474 0.000945 0.002053 7-10 0.003763 0.000342 0.000342 0.002053 0.010263'.004447 0.002053 0.001368 0.003079 0.001026 0.002395 0.006158 0.008211 0.003763 0.005816 0.004105 Speed (Kts) ll -'6 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 17 21 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000
~ 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000 Greater than 21 0.000000 0.000000 0.000000 0 F 000000 0.000000 0:000000 0.000000 0.000000 0.000000 0.000000 0.000000 0.000000
. 0.000000 0.000000 0.000000 0.000000 Total 0.012006 0.002590 0.005213 0.012543 0.042484 0.031423 0.020036 0.009611 0.015443 0.004024 0.008015 0.012153 0.013081 0.009383 0.011436 0.011224
~
i 0.044133 0.117345 0.059186 0.000000 0.000000 0.000000 RELATIVE FREQUENCY OF OCCURRENCES OF E AND F STABILITIES ~ 0.220664 RELATIVE FREQUENCY OF CALMS DISTRIBUTED ABOVE WITH E AND F STABILITIES ~ 0.014027 Page 10 of 12
l
Annual ATMOSPHERIC STABILITY FROM STAR PROGRAM FOR SYRACUSE 1967 Nine Mile Point Nuclear Station - Unit 2 Niagara Mohawk Power Corporation Fre uenc Distribution Station Syracuse N.Y. 1/67-12/67 Direction N
'VSM NW NNN AVG 1-3 10 4.
26 21 18 6
2.7 4-6 45 13 25 47 125 92 62 24 47 16 26 30 31 29 27 27 5.1 7-10 53 14 50 149 54 52 42 70 54 55 88 134 62 68 59 8.4 11 - 16 38 12 55 14 17 28 77 41 45 72 125 85 81 53
- 13. 1 17 21 0
0 22 21 60 21 34 18
- 18. 3 Greater than 21 0
0 0
0 0
0 0
32 14 24.9 Avg Spd 8.9 6.4 6.0 7.0 7.7 6.1 6.9 9.2 10.2 10.7 9.5 10.5 12.5 11.9 11.5 10.4 9.5 Total 154 27 46 116 364 182 151 107 230 130 136 224 391 217 219 164 TOTAL 151 666 1010 748 221 62 TOTAL NUMBER OP OBSERVATIONS ~ 2923 TOTAL NUMBER OP CALMS ~ 65 Page 11 of 12
'C
Annual ATMOSPHERIC STABILITY FROM STAR PROGRAM
'FOR SYRACUSE 1967 Nine Mile Point Nuclear Station - Unit 2 Niagara Mohawk Power Corporation Relative Fre uencv Distribution Station
~ Syracuse N.Y. 1/67-12/67 Direction NNE NE ENE SE SSE SSW SW NSM NAl TOTAL 0-3 0.004918 0.001831 0.002896 0.003865 0.013005 0.010260 0.008336 0.003239 0.005342 0.001543 0.002185 0.003771 0.004168 0.003005 0.002582 0.002951 0.073&97 4-6 7 10 0.015395 0.004447 0.008553 0.016079 0.042764 0.018132 0.002053 0.004790 0.017106 0.050975 0.016079 0.023948 0.005474 0.018474 0.008895 0.018316 0.010263 0.030106 0.010606 0.045843 0.009921 0.021211 0.009237 0.023264 0.009237 0.020185 0.227848 0.345535 0.031475 0.018474, 0.021211 0.017790 0.008211 0.014369 Speed (Kts) 11 - 16 0.013000 0.001368 0.000342 0.004105 0.018816 0.004790 0.005816 0 '09579 0.026343 0.014027 0.015395 0.024632 0.042764 0.029080 0.027711 0.018132 0.255901 17 21 0.002395 0.000000 0.000000 0.000000 0.002737 0.000342 0.000684 0.002053 0.007527 0.005474 0.001711 0.007184 0.020527 0.007184 0.011632 0.006158 0.075607 r
Greeter than 21 0.000342 0.000000 0.000000 0.000000 0.000342 0.000000 0.000000 0.000000 0.001026 0.000000 0.000342 0.001711 0.010948 0.004790 0.001368 0.000342 0.021211 Total 0.054183 0.009700 0.016381 0.041155 0.128639 0.065340 0.053837 0.037450 0.080265 0.044992 0.047344 0.077660 0.134855 Oe075191 0.075794 0.057005 0:
TOTAL RELATIVE FREQUENCY OF OBSERVATIONS ~ 1.000000 TOTAL RELATIVE FREQUENCY OF CALMS DISTRIBUTED ABOVE ~ 0.022237 Page 12 of 12
guestion 3
(B4)
Provide the starting speeds of all anemometers and wind vanes listed in Table B4-1.
R~es ese The F400 Climatronics wind set 'has a threshold speed of 0.58 miles per hour for both the anemometer and vane.
This is reported in Air Pollution and Meteorological Instruments by by Climatronics Corporation.
All Bendix Aerovanes on the Nine Mile Site meteorological tower are reported to provide full tracking at 2.5 miles per hour in the Bendix Environmental Catalo ue on the specification for Aerovane tzansmi tter.Model 120, page ESD021C.
However, research performed by Brookhaven National Laboratory under the auspices of the Atomic Energy Commission found a nominal threshold speed of le7 miles per hour for the Aerovane impeller.
This is reported in the Hind Tunnel Tests on Seven Aerovanes, BNL 1142.
Question 4
Discuss the land/sea breeze circulation at the site, and it's relation to air Slow trajectories over the region.
R~es oose The lake breeze effect at Nine Mile site was considered in the analy-
"sis, and our evaluation centered on two key questions.
Could the lake breeze (l) affect the X/Q values significantly and (2) is the lake breeze frequent enough to warrant a special'nalysis.
In our judgment the answer to both questions is no.
Ve concluded that it was not necessary to adjust ei ther the meteorological data or the X/Q values to account for the small effects involved.
s When a lake breeze exists, the flow of air from Zake Ontario over the land is more stable (having less diffusive capacity) than it is after the flow has moved inland Sar enough to become heated.
This implies that an estimate of X/Q which assumes that the relatively stable conditions existing at the si te tower remain un-changed as the effluent moves inland would tend to make X/Q an overestimate progressively with time and distance.
In addition to this change in the diffusive capacity, one of two other effects would be present.
If the wind gradient were also
- onshore, the influence. of the lake breeze would simply be to increase the speed of the flow, also favoring greater diffusion.
If on the other hand, the gradient flow were in opposition to the lake breeze, the onshore flow would proceed inland and then tend to rise before flowing back out over the lake.
Both of these effects would tend to decrease X/Q below the estimates made at inland locations distant from the plant.
The reverse Slow pattern occurring at night is known as a land breeze.
This flow would carry effluent from the plant out over the lake where it might remain more concentrated in relatively stable air, and it could be brought back inland again at a later time.
Such a recirculation could bring radioactivity back over the land after it had passed out over the lake, and might there-fore, add an imcrement to the X/Q values. If one were to assumeR for example, that the effluent moved out over the lake five miles and returned over the land the following day, the X/Q values in the immediate shore'sarea might be increased by 30 percent on that day.
However, the number of days which this would occur is small.
R~es onse (Conti need)
Another consideration is whether the lake breeze might cause, changes in the air f2ow trajectory so that the apparent, wind direction at the site was unrepresentative of the travel of the plume.
In a given si tua tion this might be true, so tha t the X/0 predi cted at a given location might really be found somewhere else.
On a long-term climatological basis, however, it is highly unlikely that such changes would affect the X/0 estimates significantly.
ln the first place, the 2ake breeze frequency represents no more than 5 percent of all hours at the site for 2974 and 2975.
This was de-rived from the number, of hours the wind blew from the 292.5o through 360 sectors wi th speeds less than 23 miles per hour, regardless of the time of day from April through September, the period of'ikely 2ake breezes.
- Secondly, the initial direction of the onshore breeze itself varies over a wide arc and downwind abberations of these directions are quite likely to smooth out'ver a number of cases.
It seems appropriate to point out also that an extremely accurate definition of X/0 values would in fact require continuous tracer studies over at least a year.
At a site having very simple terrain and meteorology, it is very difficult to define three-dimensional trajectories and diffusion precisely, even if a dense network of observational stations are used.
II
)
~