ML20196J174
| ML20196J174 | |
| Person / Time | |
|---|---|
| Site: | 05000083 |
| Issue date: | 03/07/1988 |
| From: | FLORIDA, UNIV. OF, GAINESVILLE, FL |
| To: | |
| Shared Package | |
| ML20196J154 | List: |
| References | |
| NUDOCS 8803140175 | |
| Download: ML20196J174 (3) | |
Text
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.rangs.drawar. The wid2 ranga drawar provides prottetion during startup through the sourca count rate interlock (2 cps), 10-acc period inhibit and the 3-sec period trip.
The primary and secondary coolant flow rate, temperature and level sensing instrumenta-tion provides information and protection over the entire range of reactor operations and is proven to be conservative from a safety viewpoint. The key switch prevents unauthor-ized operation of the reactor and is an additional full trip (manual scram) control a-vailable to the operator. The core level trip provides redundant protection to the pri-mary flow trip. The core level trip acts as an inhibit during startup until the minimum core water level is reached.
3.3 Reactor Vent System These specifications apply to the equipment required for controlled release of g:seous ra'dioactive ef fluent to the environment via the stack or its confinement within the reactor cell.
3.3.1 Specifications (1) The reactor vent system shall be operated at all times during reactor operation. In addition, the vent system shall be operated until the stack monitor indicates less than 10 counts per second (cps) unless ctherwise indicated by facility conditions to include loss of building electrical power, equipment failure, cycling console power to dump primary coolant or to conduct tests snd surveillances and initiating the evacuation alarta for tests and surveillances including emergency drills. The reactor vent system shall be immediately secured upon detection of: a failure in the monitoring system, a failure of the absolute filter, or an unanticipated high stack count rate.
(2) The reactor vent system shall be capable of maintaining an air flow rate between 1 and 400 cfm from the reactor cavity whenever the reactor is operating and as soeci-fled in these technical Specifications.
(3) The diluting fan shall be operated whenever the reactor is in operation and as otherwise Fpecified in these Technical Specifications, a t an exhaust flow rate larger than 10,000 cfm.
(4) The air conditioning / ventilation system and reactor vent systems are automatically shut off whenever the reactor building evacuation alarm is automatically or manual-ly actuated.
(5) All doors to the reactor cell shall normally be closed while the reactor is operat-ing. Transit is not prohibited through air lock and control room doors.
(6) The reactor vent system shall have a backup means for quantifying the radioactivity in the effluent during abnormal or emergency operating conditions where venting could be used to reduce cell radionuclide concentrations for ALARA considerations.
3.3.2 Ba ses Under normal conditions, to effect controlled release of gaseous activity through the reactor vent system, a negative cell pressure is ree.uired so that any building leakage will be inward. Under normal shutdown conditions with significant Argon-41 inventory in the reactor cavity, operation of the core vent system prevents unnecessary exposure f rom gas leakage back into the cell. Under emergency conditions, the reactor vont system will be shut down and the damper closed, thus minimizing laakage of radioactivity from the reactor cell unless venting is required.
8803140175 880307 Amendment 15 PDR ADOCK 05000083 P
DCD Amendment 17 10 1
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3.4 Radiation Monitoring Systems and Radioactive Effluents 3.4.1 Area Radiation Monitors The reactor cell shall be monitored by at least three area radiation monitors, two of which shall be capable of audibly warning personnel of high radiation levels. The output of at least two of the monitors shall be indicated and recorded in the control room. The setpoints for the radiation monitors shall be in accordance with Table 3.3.
3.4.2 Argon-41 Discharge The following operational limits are specified for the discharge of Argon-41 to the en-vironment:
(1) The concentration of Argon-41 in the gaseous effluent discharge of the UPTR is de-termined by averaging it over a consecutive 30-day period.
(2) The dilution resulting from the operation of the stack dilution fan (flow rate of 10,000 cfm or more) and atmospheric dilution of the stack plume (a factor of 200) may be taken into account when calculating this concentration.
(3) When calculated as above, discharge concentration of Argon-41 shall not exceed MPC (4.0 x 10-8pc/ml). Operation of the UFTR shall be such that this maximum permis-sible concentration (averaged over a month) is not exceeded.
Table 3.3 Radiation Monitoring System Settings No. of Required Type Operable Functions Ala rm( s) Setting Purpose o
Area Radiation 3 detecting 5 mr/hr low level Detect /a la rm/ record a
Monitors 2 audio alarming 25 mr/hr high level low and high level 2 recording external radiation Air Particulate 1 detecting Range adjusted ac-Detec t/ alarm / record Monitors 1 audio alarming cording to APD* type airborne radioactivity 1 recording (according to moni-in the reactor cell toring requirements)
Stack Radiation 1 detecting (1) Fixed alarm at Detect /ala rm/ record Monitor 1 audio alarming 4000 cps release of gaseous 1 recording (2) Adjustable alarm radioactive effluents as per power in the reactor vent level duct to the environs
- Air particulate detector NOTES: For maintenance or repair, the required radiation monitors may be replaced by suitable portable instruments provided the intended function is being accomplished. Service, calibration, and testing interruptions for brief periods are permiesible when the reactor is not in operation.
3.4.3 Reactor Vent /Sta.ek Monitoring System (1)
Whenever the reactor vent system is operating, air drawn through the reactor vent system shall be continuously monitored for gross concentration of radioactive gases. The outout of the monitor shall be indicated and recorded in the control room.
(2)
Whenever venting is to be used to reduce cell radionuclide concentrations during abnormal or emergency conditions, then the radioactivity in the effirent must be l
l quantified prior to initiating controlled venting.
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(3) The reactor air cavity flow shall be periodically analyzed to minimize Argon-41 re-leases to the environment while maintaining a negative pressure within the reactor cavity to minimize radioactive hazards to reactor personnel.
3.4.4 Air Particulate Monitor The reactor cell environment shall be monitored by at least one air particulate monitor, capable of audibly warning personnel of radioactive particulate airborne contamination in the cell atmosphere.
3.4.5 Liquid Effluents Discharge
,(1)
The liquid waste f rom the radioactive liquid waste holding tanks shall be sampled and the activity measured before release to the sanitary aewage system.
(2)
Releases of radioactive liquid waste from the holding tanks / campus sanitary sewage
' system shall be in compliance with the limits specified in 10 CFR 20, Appendix B, Table 1, Column 2, as specified in 10 CPR 20.303.
3.4.6 Solid Radioactive Waste Disposal Solid radioactive waste disposal shall be accomplished in compliance with applicable regulations and under the control of the Radiation Control office of the Ur.iversity of Florida.
3.4.7 Ba ses The area radiation monitoring system, stack monitoring system and air particulate detec-tor provide information to the operator indicating radiation and airborne contamination levels under the full range of operating ccnditions. Audible indica tors and alarm lights 3
indicate (via monitored parameters) when corrective operator action is required, and (in the case of the area radiation monitors) a warning light ir.dicates situations recommend-ing or requiring special operator attention and evaluation. Argon-41 discharges are lim-ited to a monthly average which is less than the unrestricted area limit, and liquid and solid radioactive wastes are regulated and controlled to assure compliance with legal requirements.
3.5 Limitations on Experiments 4
Applicability: These specifications apply to all experiments or experimental devices l
installed in the reactor core or its experimental facilities.
i objectives: The objectives are to maintain operational safety and prevent damage to the reactor facility, reactor fuel, reactor core, and associatea equipment; to prevent ex-coeding the reactor safety limits; and to minimize potential hazards from experimental
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devices.
Specifications:
(1) General The reactor manager and the radiation control officer (or their duly appointed re-presentative) shall review and approve in writing all proposed experiments prior to their performance. The reactor manager shall refer to the Reactor Safety Review Subcommittee (RSRS) the evaluation of the safety aspects of new experiments and all changes to the facility that may be necessitated by the requirements of the experi-ments and that may have safety significance. When experiments contain substances that irradiation in the reactor can convert into a material with significant Amendment 16 Amendment 17 12
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