ML20090A631
| ML20090A631 | |
| Person / Time | |
|---|---|
| Site: | Midland |
| Issue date: | 10/11/1977 |
| From: | Hulman L Office of Nuclear Reactor Regulation |
| To: | Varga S Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML17198A223 | List:
|
| References | |
| CON-BOX-13, FOIA-84-96 NUDOCS 8006240740 | |
| Download: ML20090A631 (2) | |
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ACCEPTANCE REVIEW - FTAR i
MIDLAND - CNITS 1&2 DOCKET NOS.30-329 & 50-330 2.3 Meteorology 2.3.1 Regional Climatology 75% Com.,la 372.01 In the discusaton of snowpack (p. 2.3-3) reference is made to a 1971 (2.3.1) study by M. A. 311e11o entitled. " Frozen Precipitation:
Its frequency and Associated Temperatures." published at the Eastern Snow Conference.
New grunswick.
at Oscoda, Michigan was estimated to be 0.3 g/cm.In this study, the m For calculations of the weight of snowpack at the Midland site, a snowpack density of 0.25 g/cm3 was assumed.
a)
Provide further justification for using the assumed value 3
of 0.25 g/cm. including elaboration of the statement that estimates of the density of snowpack in the site area were lees than 0.1 3/cm3 b)
Provide a copy of the sile11o reference.
372.02 i
The bases for the df scussion of the frequency of lightning strikes to (2. 3.1) structures (p. 2.3-6) is a 1971 publication by D. Bodle. " Electrical Protection Guide for Land-Based Radio Facilities" (JES-159-3-3M 1/74 Joslyn Electronic Systems).
Provide a copy of this publication.
372.03 Provide information on the occurrence of tornado's in the vicinity of the (2.3.1) site for 1976 through the present including amtimates of the intensity (maximum wind speed) and path area of each.
372.04 Provide the basis for the temperature values "used for the design or' the (2.3.1) Midland plant heating, ventilating, and air conditioning systems" (p. 2 }-1 Discuss the meteorological conditions that are important to the systems operation such as extreme temperatures over extended time periods and large temperature changes over short time periods.
2.3.2 Loesl Meteorology 80% Complete 372r.05 (2.3.2) difference appears to be biased toward the neutral (D and does not correlate well with other sites in similar meteorological regimes ani using the same vertical temperature stability classification.
For example, data from the Creenwood site (located 12 miles NW of Port Huron) showed 25: D sesbility while the Midland site indicated 57% D stability.
In addition, the Midland stability distribution which is N
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However, these two stability classification schemes have historically shown poor agreennent.
Discamos further the validity of the stability distribution based on the oestze data at the Midland plant.
372.06 Since the main tenwer is located in a parking lot, discuss any effecta
(?.3.2) this mey have on the meteorological parameters being measured.
Include discussion on t$e material the parking lat is made of, how close cars and/or trucks any be parked to the tower, any obstructions or events that may influesew the meteorological measurements and any effects the cooling pond may have on the tower measurements. Also compare meteore-logical variables recorded at the north and south towers with those similar variablas, at the main tower.
372.07 The baats for t$e discussion on the frequency of fog occurrence was (2.3.2) based on the following publications: "The Environmental Effects of the Midlant Plant Cooling Pond". Report for Consumers Power Company (1972), gechtel Cerporation; " Fog and Plumes from Power Plant Cooling Systems in the Tri-Cities-Saginaw Bay Area". D. J. Portman Report for Cornsumers P:ver Company (1975); "An Analytical and Experimental Study of Transirsc. ooling Pond Behavior". P. J. Ryan and D. R. F. Harlena Report No 181 ('9'?31 Ralph M. Parsons 1.aboratory for Water Resources i
and Hydrodynamics. MIT. Cambridge, Massachusetts.
these publications.
Provide a copy of
- 2. 3. 3 Onsite Meteoroiss* cal Measurements Program 90% Comple 372.08 Provide the caloration results for all calibrations of onsite meteoro (2.3. 3) logical instrumsat.ation and data acquisition systems.
372.09 Describe the proceses in which the plant control room will receive meteoro-(2.3. 3) logical data from the main tower including such things as how the data will be received (i.e., teletype, visual, etc.), in what form the data will be received (1.e., instantaneous values, hourly averaged values, etc.)
and what the procedure will be if something happens to render data from the main tower unrwceivable at the control roce.
- 2. 3. 4 Short-Tern (Acc1Jemt) Diffusion Estimates 100% comple l
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,. 2.3.5 Long-Tern (Rostine) Diffualon Estimates 95% Compi 372.10 Compare and explain any differences in the power law exponential values (2.3.5) given in Table 2.3-29 with those from the "Recossnended Guide for the Prediction of the Dispersi n of Airborne Effluents" (Smith, M.E. (ed),
1968. The American Society of Mechanical Engineers, New York, N. Y.).
Identify the period of onsite data used for the calculations of the site-specific exponential values.
j 3.3 Wind and Tornado Loadings I
l 3.3.1 Wind Loadings 100% Coop i 3.3.2 Tornado Loadings 90% Comp 1.
372.11 According to Regulatory Cuide 1.76, the criteria for a design basis l
( 3. 3.'2 )
tornado (D8T) indicates a pressure drcp followed instantaneously by a pressure rise.
However, for the Midland D8T a 2 second lag time is indicated between the pressure drop and pressure rise. Discuas the basis for this deviation frca Regulatory Guide 1.76 and the effects it will have on any safety-related structures.
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