ML17037B642
| ML17037B642 | |
| 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: ML17037B642 (24) | |
Text
U.S. NUCLEAR REGULATORY COM' SION NRC FoRM 195 I2-764 NRC DISTRIBUTION FoR PART 50 DOCKET MATERIAL DOCKET NUMBER 50-220 FILE NUMBER TO:
Mr. S. Nowicki FROM:
Niagara Mohawk Power Corp.
-Syracuse, New York Mr. Gerald K. Rhode DATE OF DOCUMENT 1/13/77 DATE RECEIVED 1/17/77 RfLETTER goRIGINAL
- COPY QNOTORIZED JUNC LASS IF I E D PROP INPUT FORM NUMBER OF COPIES RECEIVED
.One signed DESCRIPTION Ltr. xe their 11/1/76 ltr...trans the following:
PLANT NAME: Nine Mile Point Unit 81 APPENDIX I DISTRIBUTION AFTER ISSUANCE OF A LICENSE INDICATES DISTRIBUTION OF FULL COPY-NOTE: Distribution as pex C. Parr ish-(1-P)
ENCLOSURE I'O NOT amoVE'ACKNOWLEDGED (10-.P)
(35 copies of letter)
(Three copies, of attach)
Consi.sts of referenced ltr. regarding 10CFR50 Appendix I COIIIpliance with three copies of Attachment 1 to that ltx.'..
SAFETY BRANCH CHIEF:
(3)
PROJECT 5IANAGER'IC
~ ASST:
Lear
-Parrish FOR ACTION/INFORMATION 19 77 RJL EG NRC PDR I&E 2
OELD
.GOSSICK & STAFF
-BUTLER GRIMES DENTON LTR BALLARD AMMILL HULMAN MARKEE J
COLLINS KREGER VERDERY INTERNALD RI BUTION IST LPDR0 TIC N
ACRS EXTERNALDISTR IBUTION CONTROL NUMBE R
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W9' NRC FORM 196 I2-76)
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NIAGARA MOHAWK POWER CORPORATION
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MOHAWK 300 ERIE BOULEVARD WEST SYRACUSE, N.Y IMOR gegulatorJJ Docket File Zanu'ary 13, 1977 Director of Nuclear Reactor Regulation Attn:
Mr. S. Nowicki U. S. Nuclear Regulatory Commission 8'ashington, D. C.
20555 fp Re:
Nine Mile Point Unit 1 Docket No. 50-220 DPR-63 Gentl emen:
Pursuant to your request, thirty-six copies of our November 1, 1976 letter, regarding 10CFR50 Appendix I compliance, from Mr. G. K. Rhode t'o Mr. George Lear are enclosed.
Also enclosed are three copies of Attachment 1 to that letter.
Very truly yours, NIAGARA MOHAWK POWER CORPORATION ERA K. RHO E Vice -President - Engineering MGM/sz Attachment
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NIAGARA MOHAWK POWER CORPORATION pC",A; NIAGARA:~g( MOHAWK 300 ERIE SOUL EVARO WEST SYRACUSE, H, Y. I3202 XCS PGM(-QIJ 'T ZxC<r imper -~
November l, l976 (gt gO 0
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Io Director of Nuclear Reactor Regulation Attn:
Mr. George Lear, Chief Operating Reactors Branch ¹3 U. S. Nuclear Regulatory Commission Vashington, 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 Mi'le Point Unit 1 with 10CFR50, Appendix Z.
Provided herewith is our response to this request.
Very truly yours, NZAGARA MOHAWK POWER CORPORA2'ION
"" GERALD K. RHODE Vice President En'eering MGH/sz Attachment
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guesti on 1 (Bl)
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Provide the joint frequency distribution of wind speed and direction by atmospheric stability class (Tables Bl-5 through Bl 9) such that:
1) the atmospheric stability classes are as defined in Regu-latory Guide 1.23 and include Classes A through G; and, 2) calms are not included in the 0-,3 mph wind speed class, but rather are 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 wi th the atmospheric
.stability classes listed in Regulatory Guide 1.23 are given for the 30-ft., 100-ft. and 200-ft. levels in Attachment 1.
All data a'e from the Nine Mile Site meteorological tower for 1974 and 1975.
The 200-ft. and 30-ft. distributions are presented in response to the Nine Mile Point Unit 1 request and the 100-ft. distributions are presented in response to the James A. FitzPatrick Nuclear Power Plant request.
In addition to the individual stability classes, an all sta-R~iZit sind roseand
,a direction versus s eed sind rose follow each distribution 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 1974 and 1975 for the 30-ft. level is given in Table l.
Table 2 shows the distribution for the 100-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 30-ft.,
100<<ft. and 200-ft. levels, respectively.
Combined monthly stability wind roses for the 30-fte level are presented in Table 7, for the 100-ft. level in Table 8, and for the 200-ft.
level in Table 9.
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Question 2 (2)
The stability classes on pages l0, Il, and l2 of Table B2-3 appear mislabeled.
Please correct.
R~es ouse The tables were mislabeled; corrected tables are included in this response.
In addition, it was necessary to correct page 9 of Table B2-3, which is attached.'he Star program for l967 combined Classes E and F and are so noted on the corrected tables.
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Annual ATMOSPHERIC STABILITY FROM STAR PROGRAM FOR SYRACUSE 1967 Nine Mile Point Nuclear Station - Unit 2 Niagara Mohavk,power Corporation Fre uenc Distribution Station Syracuse N.Y. 1/67-12/67 Direction N
NNE E
ESE SSE SSN 1 - 3 17 14 12 4-6
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19 25 69 36 17 13 7-10 J
30'3 6
Speed (Kts) 11 - 16
.0 0
0 0
0 0
0 0
0 0
0 17 - 21 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
Aug Spd 6.2 4.9 4.6 5.5 5.5 5.0 4.8 5.1 5.4 5.5 6.0 Total 33 116 85 54 26 42 22 WSM 10 18.
0 0
0 62 34 NNW AVG 2.7 10 12 12 16 5.1 17 12 8.3 0
0 0
0 0.0 0
0 0
0 0.0 0
a 0
0 0
0.0 7.3 6.4 6.6 6.1 5.3 37 Z6 32 31 88 343 173 0
0 NUMBER OF OCCURRENCES OF E AND F STABILITIES ~ 645 NUMBER OF CALMS MITH E AND F STABILITIES ~ 41 Page 9 of 12
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Annual ATMOSPHERIC STABILITY PROM STAR PROGRAM FOR SYRACUSE 1967 Nine Mile Point Nuclear Station - Unit 2 Niagara Mohawk Power Corporation Relative Pre uenc Distribution Station Syracuse N.Y. I/67-12/67 Direction NE SE SSE SSM SM NSM 0-3 0.001742 0.000537 0.001792 0.001938 0-008615 0.007133 0.005668 0.002427 0.003469 0.000945 0.001172 0.002573 0.001449 0.001515 0.001515 0.001645 4-6 0.006500 0.001711 0.003079 0.008553
'.023606 7-10 0.003763 0.000342 0.000342 0.002053 0.010263 0.019843 0.004447 0.012316 0.005816 0.008895 0.002053 0.004447 0.003421 0.003421 0.002053 0.001368 0.003079 0.001026 0.002395 0.006158 0.008211 0.004105 0.005474 0.005816 0.004105 0.004105 0.003763 Speed (Kts) 11 '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 0.000000 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 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
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
NE ESE SE SSE LSM NV NNV AVG 1-3 10 4
26 21 18 2.7 4-6 45 13'5 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 ll 16 38 12 55 14 17 28 77 41 72 125
'85 81 53
- 13. 1 17 - 21 0
0 0
22 16
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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'
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 46 116 364 182 151 107 230 130 136 224 391 217 219 164 151 666 TOTAL NUMBER OF OBSERVATIONS ~'2923 TOTAL NUlSER OF CALMS ~ 65 1010 748 221 Page 11 of 12
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Annual ATMOSPHERIC STABILITY FROM STAR PROGRAM FOR SYRACUSE 1967 k
Nine Mile Point Nuclear Station - Unit 2 Niagara Mohawk Power Corporation Relative Fre uenc Distribution Station Syracuse N.Y. 1/67-12/67 Direction N
NE ENE ESE SE SSE SSM SM MSQ 0-3 0.004918 0.001831 0.002896 0.003865 0.013005 0.010260 0.008336 0.003239 0.005342 4-6 0.015395 0.004447 0.008553 0.016079 0.042764 0.031475 0.021211 0.008211 0.016079 0.002185 0.003771 Oi004168 0.003005 0.002582 0.002951 0.008895 0.010263 0.010606 0.009921.
0.009237 0.009237 0.001543
'.005474 7-10 0.018132 0.002053 0.004790 0.017106 0.050975 0.018474, 0.017790 Speed (Kts) 11 16 0.013000 0.001368 0.000342 0.004105 0.018816 0.004790 0.005816 0.014369 0.009579 0.023948 0.026343 17 -. 21 0.002395 0.000000 0.000000 0.000000 0.002737 0.000342 0.000684 0.002053 0.007527 0.018474 0.018316 0.030106 4
0.045843.
0.021211 0.023264 0.020185 0.015395 0.024632 0.042764 0.029080 0.027711 0.018132 0.001711 0.007184 0.020527 0.007184 0.011632 0.006158 0.014027 0.005474 Greater 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 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 Oi 075191 0.075794 0.057005 0'.073897 0.227848 0.345535 0.255901 0.075607 0.021211 TOTAL RELATIVE FREQUENCY OF OBSERVATIONS ~ 1.000000 TOTAL RELATIVE FREQUENCY OF CALMS DISTRIBUTED ABOVE ~ 0.022237, Page 12 of 12
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Ouestion 3
(B4)
Provide the starting speeds of'll anemometers and wind vanes listed in Tabl B4-1.
R~es sse 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 Meteorolo ical 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 transmitter Model 120, page ESM21C.
However, research performed by Brookhaven National Laboratory under the auspices of the Atomic Energy Commission found a nominal= threshold speed of 1.7 miles per hour for the Aerovane impeller.
This is reported in the Wind Tunnel Tests on Seven Aerovanes, BNL 1142.
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Question 4
Discuss the land/sea breeze circulation at the site, and its relation to air flow trajectories over the region.
R~es oose The lake breeze effect at Nine Hile site was considered in the analy-sis, and our evaluation centered on two key questions.
Could the lake breeze g) 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.
h'e concluded that it was not necessary to adjust either the meteorological data or the X/Q values to account for the small effects involved.
Shen a lake breeze exists, the flow of air from Lake Ontario over the land is more stable Qaving less diffusive capacity) than it
,is after the flow has moved inland far enough to become heated.
This implies that an estimate of X/Q which assumes that the relatively stable conditions existing at the site tower remain un-..
changed as the effluent moves inland would tend to make X/Q an overestimate progressively with time and distance.
Xn addition to this change in the diffusive capacity, one of taro 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 flow 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.
Zf one were to assume, for example, that the effIuent moved out over the lake five miles and returned over the land the following day, the X/Q values in the immediate shore area might be increased by 30 percent on that day.
- However, the number of days which this would occur is small.
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R~es onse (Conti nued)
'I Another consideration is whether the lake breeze might cause changes in the air flow trajectory so that the apparent wind direction at the site was unrepresentative of the travel of the plume.'n a
given situation this might be true, so that the X/g predicted at a given location might really be found somewhere 'else.
On a long-term climatological basis, however, itis highly unlikely that such changes would affect the X/g estimates significantly.
In the first place, the lake breeze frequency represents no more than 5 percent of all hours at the site f'r 1974 and 1975.
This was de-rived from the number of hours the wind blew from the 292.5o through 360 sectors with speeds less than 13 miles per hour, regardless of the time of day from April through September, the period of likely lake 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 smoo'th out over a number of cases.
It seems appropriate to point out also that an extremely accurate definition of X/Q 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.
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