ML20004D955
| ML20004D955 | |
| Person / Time | |
|---|---|
| Site: | Wolf Creek  |
| Issue date: | 08/18/1978 |
| From: | Vassallo D Office of Nuclear Reactor Regulation |
| To: | Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20004D954 | List: |
| References | |
| NUDOCS 8106100403 | |
| Download: ML20004D955 (2) | |
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O Doctet No:
All Pc.ser Reactor Licensees, and Applicants with Applications for a License to Operate or Cons truct a Power Reactor Gentlecen:
SUBJECT:
STANDARD FORPAT FOR METEOROLOGICAL DATA ON MAGNETIC TAPE A standardized format for providing hour-by-hour meteorolo'gical data on magnetic tapes that would facilitate our review of atmcspheric diffusion characteristics and cooling system impacts was distributed in a letter in April 1977.
This has led to a faster and more efficient meteorological r'eview in the cases where these h6,urly data tapes have been received.
Hcwaver, even though most of the magnetic tapes that have been received since April 1977 have met the data formatting criteria, problems with the physical attributes such as tape recording technique, density, internal labels, etc., have rendered some of the tapes unreadable.
This has led to delays in att mpts to process the tape data or in the requast and delivery of a second tape as a 3
replace..ent from the origina tor.
To give further guidance in this area, a more detailed description of the tape attributes for an IBM and CDC system is enclosed.
Questions on the standard for.T.at should be referred to William Snell, Hydrology "eteorology Branch, Division of Site Safety and Environmental Analysis, phone number 301-492-7288.
Sincerely,
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Domenic B. Vassallo, Assistant Director for Light Water Reactors Division of Project Managemertt
Enclosure:
As stated 1
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P00R ORIGIMI.
810610oyp}
USE KEYWORDS IBM Fk,de:
9-track, 1600bpi. EDC0!C1 CJC UNIT = TAPE 9, DEN = 3 NT,PE,EB,5,h$$=
Internal Labels:
2 none LABEL = (;NL)
Record Format:
fixed length / blocked RECFM = FB RT = F, BT = 4 Record Length:
160 characters LRECL = 160 FL = 160
, Blocking:.:
3200 characters / block BLKSIZE - 3200 RB = 20 1
9-track, 800 bpi. EBCDIC cr 7-track, 800 or 556 bpi, BCD are also acceptable 2
10M standard labels are also acceptable DO NOT USE Variable length or unformatted records or records that span tape blocks.
e.g.
IPM!s RECFM = U or VBS COC SCOPE standard tape data fonnat (use the 5 paras.ieter on the e.g.
REQUEST to avoid this)
OTitER SYSTEMS For systems other than IBM or CDC the above infonnation should be used as a guideline 1
to produce tapes with simil4r characteristics.
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.Y Gentiemen:
SUBJECT:
STANDARD FOMT FOR METEOROLOGICAL DATA ON PAGNETIC TAPE Regulatory Guide 1.70, Revision 2, " Standard Format and Content of Safety Analysis Reports for Nuclear Power Plants" (September 1975),
recem ends that, if possible, hour-by-hour meteorological data should be provided on magnetic tape.
The draft Environmental Standard Review l
Pl
.) for mateorology (included in NUREG-0158 Part 1, January 1977) j provides some guidance on the types of magnetic tapes that are acceptable and identifies limitations on block size and density. We have also deve. loped a standardized format (Enclosure 1) for providing j
hour-by-hour meteorological data en magnetic tapes that would facili-
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tate our review of atmospheric diffusion characteristics and cooling system impacts. provides a sample tape dump using this j
forma t.
We would prefer receiving meteorological data magnetic tapes in the standard format; however, we will accept data on magnetic tape in any reasonable format, if the format is completely described (per guidance. in MUREG-0158, Part 1) and a sample tape dump is provided.
Questions on this standard format should be referred to William Snell, l
Hydrology-Meteornlogy Branch, Division of Site Safety and Environmental Analysis, phone number 301-492-7384.
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l This request for generic information was approved by GAO under blanket clearance numbar B-150225 (R0072).
This clearance expires July 31, 1977.
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Sincerely, b
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Domenic B. Vassallo, Assistant Director for Light Water Reactors Division of Project Management
Enclosures:
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