Protecting People and the EnvironmentUNITED STATES NUCLEAR REGULATORY COMMISSION
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GL 78-28
UNITED STATES
NUCLEAR REGULATORY COMMISSION
WASHINGTON, D.C. 20555
July 28, 1978
ALL BWR POWER REACTOR LICENSEES
Gentlemen:
We have discovered that pages 3/4 3-51 and B 3/4 11/5 were inadvertently
omitted from the Draft Radiological Effluent Technical Specifications for BWRs
(BWR-STS-I) which were forwarded to you by our letter dated July 11, 1978.
Attached are copies of the omitted pages for your use.
If you have any questions on this matter, please contact us.
Sincerely,
Brian K Grimes, Assistant Director
for Engineering and Projects
Division of Operating Reactors
Enclosures:
1. Page 3/4 3-51
2. Page B 3/4 11-5
8101100430
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TABLE 4.3-11 (Continued)
TABLE NOTATION
* - During releases via this pathway.
** - During liquid additions to the tank.
(1) - The CHANNEL FUNCTIONAL TEST shall also demostrate that automatic
isolation of this pathway and control room alarm annunciation occurs if
any of the following conditions exist:
1. Instrument indicates measured levels above the alarm/trip setpoint
2. Circuit failure.
3. Instrument indicates a downscale failure.
4. Instrument controls not set in operate mode.
(2) - The CHANNEL FUNCTIONAL TEST shall also demonstrate that control room
alarm annunciation occurs if any of the following conditions exist:
1. Instrument indicates measured levels above the alarm/trip setpoint.
2. Circuit failure.
3. Instrument indicates a downscale failure.
4. Instrument controls not set in operate mode.
(3) - The CHANNEL CALIBRATION shall include the use of a known (traceable to
the National Bureau of Standards radiation measurement system) liquid
radioactive source positioned in a reproductible geometry with respect
to the sensor and emitting beta and gamma radiation with the fluences
and energies in the ranges measured by the channel during normal
operation.
BWR-STS-I 3/4 3-51
8101100437
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RADIOACTIVE EFFLUENTS
BASES
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3/4.11.2.5 EXPLOSIVE GAS MIXTURE
This specification is provided to ensure that the concentration of
potentially explosive gas mixtures contained in the waste gas holdup system is
maintained below the flammability limits of hydrogen and oxygen. (Automatic
control features are included in the system to prevent the hydrogen and oxygen
concentrations from reaching these flammability limits. These automatic
control features include isolation of the source of hydrogen and/or oxygen,
automatic diversion to recombiners, or injection of dilutants to reduce the
concentration below the flammability limits.) Maintaining the concentration
of hydrogen and oxygen below their flammability limits provides assurance that
the releases of radioactive materials will be controlled in conformance with
the requirements of General Design Criterion 60 of Appendix A to
10 CFR Part 50.
3/4.11.2.6 MAIN CONDENSER
Restricting the gross radioactivity rate of nobel gases from the main
condenser provides reasonable assurance that the total body exposure to an
individual at the exclusion area boundary will not exceed a small fraction of
the limits of 10 CFR part 100 in the event this effluent is inadvertently
discharged directly to the environment without treatment. This specification
implements the requirements of General Design Criteria 60 and 64 of Appendix A
to 10 CFR Part 50.
3/4.11.2.7 MARK I CONTAINMENT (OPTIONAL)
This specification provides reasonable assurance that releases from drywell
purging operations will not exceed the annual dose limits of 10 CFR Part 20
for unrestricted areas.
3/4.11.3 SOLID RADIOACTIVE WASTE
The OPERABILITY of the solid radwaste system ensures that the system will be
available for use whenever solid radwastes require processing and packaging
prior to being shipped offsite. This specification implements the
requirements of 10 CFR Part 50.36a and General Design Criteria 60 of
Appendix A to 10 CFR Part 50. The process parameters included in establishing
the PROCESS CONTROL PROGRAM may include, but are not limited to waste type,
waste pH, waste/liquid/solidification agent/catalyst ratios, waste oil
content, waste principal chemical constituents, mixing and curing times.
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