IR 05000312/1985035
| ML20206L474 | |
| Person / Time | |
|---|---|
| Site: | Rancho Seco |
| Issue date: | 05/28/1986 |
| From: | Stolz J Office of Nuclear Reactor Regulation |
| To: | Julie Ward SACRAMENTO MUNICIPAL UTILITY DISTRICT |
| Shared Package | |
| ML20205N830 | List: |
| References | |
| NUDOCS 8606300287 | |
| Download: ML20206L474 (8) | |
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May 28,1986 g 3 o)(
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Docket No. 50-312 Mr. John Assistant General Manager, Nuclear (Acting)
Sacramento Municipal Utility District 6201 S Street P. O. Box 15830 Sacramento, California 95813
Dear Mr. Ward:
SUBJECT: RANCHO SEC0 NUCLEAR - QUALITY OF NETEOROLOGY DATA COLLECTED IN 1984 Enclosed (enclosure 2) for your information is the Technical Evaluation Report (TER) prepared by our contractor, the Pacific Northwest Laboratories regarding the quality of the meteorological data collected at the Rancho Seco site for the period January-December 1984.
As noted in the TER, the quality assurance and maintenance program for the meteorological measurements system appears generally ineffective, with particular concern regarding the measurement of vertical temperature difference used as an indicator of atmospheric stability. Without a reliable indicator of atmospheric stability, all dose calculations, such as those used I
in emergency response situations or for assessments of the impacts of routine releases of radioactive material to the atmosphere, are suspect. Our contractor also noted in the TER, and we agree, that internal inconsistencies between similar measured parameters and spurious values found throughout the data acquisition system could significantly affect recommendations for protective actions in the event of an emergency at the plant.
We understand that in the spring of 1985 you set up a task force to imprrve the meteorological program.
In addition, you hired a consultant to assist you in the improvement program.
Subsequently, Region V in its inspection report 50-31/85-35 dated December 20, 1985, noted that it appeared that you had expended considerable effort to eliminate discrepancies in the meteorological data. Region V further noted that you have made considerable improvement in the meteorological measurements program.
In order for us to evaluate how effective the improvement program has been in improving the quality of the Rancho Seco meteorology measurements, we require the information outlined in the request for additional information (enclosure 1). Within 7 days of receipt of this letter, please inform us when the information will be submitted so that we can schedule our effort.
We require the information in time for us to complete our evaluation on the effectiveness of the improvement program prior to restart of Rancho Seco.
8606300287 860528 PDR ADOCK 05000312 F
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.i The reporting and/or record keeping requirements contained in this letter
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affect fewer than ten respondents, therefore, OMB clearance is not required under P.L.96-511.
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Sincerely,
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John F. Stolz, Director PWR Project Directorate #6
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Division of PWR Licensing-B i
Enclosures:
i As stated j
cc w/ enclosures:
See next page l
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H0rnstein OELD JPartlow SMiner
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Mr. J. Rancho Seco Nuclear Generating Sacramento Municipal Utility District Station
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Mr. David S. Kaplan, Secretary Sacramento County and General Counsel Board of Supervisors Sacramento Municipal Utility 827 7th Street, Room 424 District Sacramento, California 95814 6201 S Street P. O. Box 15830 Ms. Helen Hubbard Sacramento, California 95813 P. O. Box 63 Sunol, California 94586 Thomas Baxter, Esq.
Shaw, Pittman, Potts & Trowbridge 1800 M Street, N.W.
Washington, D.C.
20036 Mr. Robert B. Borsum Babcock & Wilcox Nuclear Power Generation Division Suite 220, 7910 Woodmont Avenue Bethesda, Maryland 20814 Resident Inspector / Rancho Seco c/o U. S. N. R. C.
14410 Twin Cities Road Herald, California 95638
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Regional Administrator, Region V U.S. Nuclear Regulatory Commission 1450 Maria Lane, Suite 210 Walnut Creek, California 94596 Director Energy Facilities Siting Division Energy Resources Conservation &
Development Commission 1516 - 9th Street Sacramento, California 95814 Mr. Joseph 0. Ward, Chief Radiological Health Branch State Department of Health Services 714 P Street, Office Building #8 Sacramento, California 95814 l
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Enclosure 1
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RANCHO SEC0 NUCLEAR GENERATING STATION
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REQUEST FOR ADDITIONAL INFORMATION METEOROLOGICAL PROGRAM With regard to the improvements made in the meteorological monitoring program since the collection of the 1984 data, please provide the following:
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Methods utilized to determine the problems that existed in the 1984 monitoring program, the problems found, and measures taken to correct the problems found and to prevent recurrence in the future.
2.
Provide a meteorological data tape which presents the data collected since the meteorological program was upgraded, preferably in the enclosed format (Appendix A), or provide the format details.
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FORMAT f0R HOURLY tRIFOR0l0GICAL DATA TO BE PLACED ON MAGNEllC TAPE Use:
9 track tape (7 will be acceptable)
Standard Label, which would include Record Length = 160 characters Block Size = 3200 characters (fixed block size)
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Density = 1600 SPI preferred (800 BPI will be accepted)
Do not Use:
Magnetic tapes with unformatted or spanned records.
(For guidance on tape formatting and a description of tape attributes, see Tables A-1 and A-2.)
At the beginning of each tape, use the first five records (which is the equivalent of ten cards) to give a tape description.
Include plant name and location (latitude, longitude), dates of data, information explaining data contained in the "other" fields if they are used, height of T.sasurer.ents, and
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any additional information pertinent to identification of the tape.
"ike sure (
all five records are included, even if same are blank.
Format for the first i
five records will be 160A1.
Meteorological data format is (16,12,13, !4, 25F5.1, F5.2, 3F5.1).
Decimal points should not be included when copying data onto the tape.
All da'ta should be given to a tenth of a unit except solar radiation, which shouldbegiventoahundredthofaunit.
This does not necessarily indicate the accuracy of the data (e.g., wind direction is usually given to the nearest degree, but record it with a zero in the tenth's place; therefore, 275 degrees
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would be 275.0 degrees and placed on the tape as 2750.) All nines in any field should indicate a lost record (99999).
All sevens in a wind direction field should indicate calm (77777).
If only two levels of data are monitored, use the upper and lower level fields.
If only one level of data is monitored, use the upper level field.
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TABLE A _1
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MAGNETIC TAPE METEOROLOGICAL DATA 1.0 CATION:
DATE OF DATA RECORD:
__ I6 Identifier (can be anything)
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' Year
Julian' Day
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ACCURACY F5.1 Upper Measurements:
Level =
meters F5.1 Wind Direction (degrees)
F5.1 Wind Speed (m/s)
F 5.1 Sigma Theta (degrees)
F5.1 Ambient Temperature ( C)
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F5.1 Moisture:
_ F5.1 Other:
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F5.1 Intermediate Measurements:
Level =
meters
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F5.1 Wind Direction (degrees)
F5.1 Wind Speed (m/s)
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F5.1 Sigm, Theta (degrees)
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F5.1 Ambient Temperature (?C)
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_ F5.1 Moisture:
F5.1 Other:
F5.1 Lewer Measurements:
Level =
meters
,_ F5.1 Wind Direction (degrees)
FS.1 Wind Speed (m/s)
F5.1 Sigma Theta (degrees)
FS.1 Acbient Temperature ( C)
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__ F5.1 Maisture:
___ F 5.1 Other:
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I.'HIf A-1 (Con inued)
l FS.1 Temp Diff (Upper-l.e er) ( C/100 meters)
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F5.1 Temp Diff (Upper-Intermediate) ( C/100 meters)
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F5.1 Temp Diff (Intermediate-Lower) ( C/100 meters)
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FS.1 Precipitation (mm)
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FS. 2 Solar Radiation (cal /cm / min)
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F5.1 Visibility (km)
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F5.1 Other:
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FS.1 Other:
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TABLE A-2
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DATA TAPE ATTRIBUTES
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USE KEYWORDS
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183 CDC
e Mode:
9-track, 1600bpi, EBCDIC UNIT = TAPE 9, DEN = 3 NT, PE, EB, S, CM = Yes
Internal Labels:
none LABEL = (;NL)
Record format:
fixed length / blocked RECFM = FB RT = F, BT = K
, Record Length:
160 characters LRECL = 160 FL = 160
Blocking:
3200 characters / block BLKSIZE = 3200 RB = 20 E!
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Variable length or unformatted records or records that span tape blocks, e.g.:
IBM's RECFR = 0 or VBS.
- CDC SCOPE standard tape data format (use the 5 parameter on the REQUEST to avoid this).
I OTHER SYSTEMS
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i For systems other than IBM or CDC, the above information should be useJ as a guideline to produce tapes with similar characteristics.
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9-track, 800 bpi, EBCDIC or 7-track, 800 or 556 bpi, BCD are also acceptable.
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1BM standard labels are'also acceptable.
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