ML19343A506
| ML19343A506 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 08/07/1970 |
| From: | Morris P US ATOMIC ENERGY COMMISSION (AEC) |
| To: | Minnick L YANKEE ATOMIC ELECTRIC CO. |
| References | |
| NUDOCS 8011140274 | |
| Download: ML19343A506 (6) | |
Text
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AUG 7 1970
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Docket No. 50-29 Tankee Atomic Electric Company ATTN:
Mr. L. E. Minnick Vice President 20 Turnpika Road Westboro, Massachusetts 01581 Gentlemen:
As nuclear power plants increase in number and in size, and as interest increases in questions relating to environmental effects of nuclear facilities, it becomes increasingly important that uniform methods be followed for measuring the effluents released into the environment, for monitoring the environmental effects of radiation, for recording the results of thf a monitoring and for reporting sumaries of thir information to the Atomic Enerry Commission.
At present there is substantial variation in monitoring practices among the older reactor facilities on effluent monitoring, in the extent of isotopic analysis of radioactive affluent, the choice of standar/.s among those permitted to be used, and the scope and depth of w eironmental monitoring. The programs are fully adequate to i
show that affluents are within permitted levels, but other needs exist which make it important to have more explicit and uniform monitoring procedures and recording of information.
The AEC, with conenents and advice from the Bureau of Radiological Health, has developed a tentative "Uniforn %nitoring, Recording and Reporting Guide" which is intended to be used an a model for technical specifications-in fact this guide has been used in part for this purpose for reactors recently licensed. We believe it represents a substantial improvement in the surveillan-e system.
P302 GRlGINAL<
801114027f
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' C Company However, before formally proposing this as a proposed rule for all nuclear powcr plants, vc are seeking information from a fe'.'
older facilities on the impact thin would have on their operations, the difficulties the transition would entail, the cost, and tine.
We would greatly appreciate your sunnlying un th's information, or other comments on this proponal.
A copy of the tentative guide is enclosed.
Sincerely, Peter A. Morris, Director Division of Reactor Licensine
Enclosure:
Uniform !!onitoring Recording and Renorting Guide cc:
C. Duane Blinn. Esquire DISTRIEUTIO":
Day, Berry L lb arJ ACES (3)
Counsclors at Lav H. L. Price 1 Constitution Placn C. K. Bee!
Hartford, Connecticut 061 M
" M. '4 ann S. H. Hanauer C. Handernon P. A. '4 orris E. C. Case, DES L. Rogsts, PJ'S T. R. Wilson F. Schroeder D. J. Skovholt R. DeYoung R. Boyd W. Dooly, DE R. Engelken, Cn (2)
OGr' (2)
P. Howe Docket File PDR DE Reading Branch Reading R. H. Vollmer Licensing Assistant
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UNIFORM MONITORING, RECORDING AND REPORTING GUIDE Cuide to Monitoring and Recording Requirements (a) Caseous Releases Station records of gross stack release rate of gaseous activity shall be maintained on an hourly basis during periods of release to assure that the specified rates are not exceeded.
Within one month after commercial service of the unit, an isotopic analysis shall be made of a sample of the gaseous activity released.
From this sample, a ratio of long lived G>30 minutes) and short lived (30 minutes or less) activity shall be established. For BWR's,during each day of operation samples of off-gas shall be taken and gross ratio of long lived aad short lived activity determined. When the samples indicate a change in the ratio of greater than 20% from the ratio established by the previous isotopic analysis, a new isotopic analysis shall be performed. An isotopic analysis of off-gas, including tritium, shall be performed at least quarterly, Records of all isotopic analyses performed shall also be maintained.
(b) Halogen Releases Station records of release of iodines shall be maintained on the basis of determinations on all stack and chimney iodine filter cartridges. The filter cartridges shall be analyzed weekly When the noble gas release rate is less than 10% of average annual rate, otherwise the cartridges shall be counted at least twice a week. A determination of the percent of I-131 in gaseous effluents shall be performed at least quarterly.
Records of all isotopic analyses performed shall also be maintained.
(c) Particulate Releases Station records of release of particulates shall be maintained on the basis of all stack and chimney particulate filter cartridges counted. The filter cartridges shall be counted weekly when the noble gas release rate is less than 10% of average annual rate, otherwise the cartridges shall be counted at least twice a week.
An isotopic analysis of particulates released will be performed at least quarterly. Records of all isotopic analyses performed shall also be maintained.
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- (d) Liquid Releases Station records shall be maintained of the gross u.dioactive concentration and volume of each batch of liquid effluent released and the average condenser cooling water flow and length of time over which each discharge occurred-Identification of radionuclides in a representative sample of the liquid effluent, including determination of the tritium content, shall be performed and recorded within the first calendar quarter following initial full power operation, at least once per quarter thereafter, and within one month following each refueling, process change, or other operation which could significantly alter the mix of radionuclides.
Each batch of liquid effluent released shall be analyzed for gross alpha, beta, and gamma activity and the results recorded.
Should there be any v explained statistically significant change in gross garna activity from the previous analysis, the isotopic composition of the effluent shall be determined.
Guide to Environmental Monitoring Recuirements (a) Environmental Levels:
Scope of Sampling Surveillance if, on the basis of effluent measurements, projected human exposures or intakes, taking into account possible physical or biological reconcentration mechanisms, do not exceed 3% of those which would be expected to result from continuous exposure to air or water at the concentrations specified in Appendix B, Table 11, 10 CFR Part 20, a minimal environmental monitoring program may be carried out.
Such a program would typically include quarterly samples of air, water, and food products at selected locations to be determined on an ad hoc, case-by-case basis.
Its purpose would be to verify that actual exposures and intakes are not likely to exceed 3% of those that might result from exposure to the Part 20 concentrations-If projected human intakes do exceed 3% of those that might result from exposure to the Part 20 concentrations, a more comprehensive program is required.
Such a program would require more frequent sampling, more sampling locations, and possibly more sampling media.
its purpose would be to provide a basis for determining critical nuclides and pathways and identifying critical exposed population groups, so as to be able to estimate actual human intakes.
This level is consistent with the top of Range I, as defined in FRC Report No. 2.
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. Guide to Requirements for Reporting to AEC:* Units, Terms, Reporting Data Radioactive Effluent Releases (a) Liquid Releases 1.
Total number of gross curies released, other than tritium and average concentration (in microcuries per milliliter) at outfall of discharge canal.
2.
Total number of curies of tritium discharged, and average concentration (in microcuries per milliliter) at outfall of discharge canal.
3.
Total volume (in gallons) of liquid waste released into discharge canal.
4.
Total volume (in gallons) of dilution water used.
5.
The imum gross concentration released (in microcuries per milliliter averaged over the period of a single release).
6.
Estimated total curies released, by nuclide (other than tritium), based on representative isotopic analyses performed.
7.
Percent of applicable limits released, based on nuclide identifications performed.
(b) Gaseous Releases 1.
Total number of curies released of noble gases and of halogens and particulates with half-lives greater than eight days.
2.
Total number of curies of tritium discharged.
3.
The maximum release rate (in curies per second for any one hour period).
4.
Estimated total curies released, by nuclide (other than tritium), based on representative isotopic analyses performed.
- Reports to be submitted within 30 days after January 1 and July 1 of each year covering data collected during the previous six months, with the data summarized on a monthly basis.
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- 5.
Percent of applicable limits released, based on nuclide identifications performed.
Environmental Monitoring 1.
For each medium sampled during the six-month period, the number of sampling locations, tne total number of samples, the number of locations at which levels are found to be significantly above local backgrounds, and the highest, lowest, and the annual average concentrations or levels of radiatio" for the location with the highest average and description of that location.
2.
If levels of radioactive materials in environmental media indicate the likelihood of public intakes in excess of 3%
of those that could result from continuous exposure to the concentration values listed in Appendix B, Table II, estimates of the likely resultant exposure to individuals and to population groups, and assumptions upon which estimates are based. These values are comparable to the top of Range I, as defined in FRC Report No. 2.
3.
If statistically significant variations in off-site environmental concentrations with the time are observed, correlation of these results with effluent relenses.