ML20215B161
| ML20215B161 | |
| Person / Time | |
|---|---|
| Site: | 05000083 |
| Issue date: | 06/02/1987 |
| From: | TEXAS, UNIV. OF, AUSTIN, TX |
| To: | |
| Shared Package | |
| ML20215B127 | List: |
| References | |
| NUDOCS 8706170241 | |
| Download: ML20215B161 (9) | |
Text
- _ _ _ _ _ _ _ _ _ _ _ _ _ - _ . _ _ _ _ .
.I i
l ATTACHMENT I UFTR TECH SPEC Pages 10-12 As Amended l
l 1
I P l G 2
. i . range drawer. The ' wide range drawer provides protection during startup through the source count rate interlock (2 cps), 10-sec period inhibit and the.3-sec period trip. The primary and secondary coolant flow rate,. temperature and . lev-
~
)
el sensing instrumentation 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 unaut.horized operation of ' the reactor and y is an additional full trip (manual scram) control available to the operator. i The core level trip provides redundant protection to the primary flow trip.
The core level trip acts as an inhibit during startup until the minimum core j water level is reached.
3.3 Reactor Vent System These specifications apply to the equipment required for controlled. release of gaseous radioactive effluent to the environment via the stack or its confine- {
ment within the reactor cell.
3.3.1 Specification (1) The reactor vent system shall be operated at all times during reactor op-eration. In addition, the vent system should be operated until the stack i monitor indicates less than 10 counts per second (eps) unless otherwise I indicated by cell conditions. The reactor vent system shall be immediate-ly secured upon detection of: a failure in'the. monitoring system,'a fail- I ure 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 i between 1 and 400 cfm from the reactor cavity whenever the reactor is I operating and as specified in these Technical Specifications.
(3) The diluting f an shall be operated whenever the reactor is in operation and as otherwise specified in these Technical Specifications, at an ex-haust flow rate larger than 10,000 cfm.
(4) The air conditioning / ventilation system and reactor vent systems are au- 1 tomatically shut off whenever the reactor building evacuation ' aj arm is !
automatically or manually actuated. 1 (5) All doors to the reactor cell shall normally be closed while the reactor is operating. Transit is not prohibited through air lock and control room ,
doors.
3.3.2 Bases Under normal conditions, to effect controlled release of' gaseous activity through the reactor vent system, a negative cell pressure is required 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 from gas leakage back into the cell.
Under emergency conditions, the reactor vent system will be shut-down and the damper closed, thus minimizing leakage of radioactivity from the reactor cell.
3.4 Radiation Monitoring Systems and Radioactive Ef fluents 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 re-Amendment 15 Amendment 17 10
l corded in the control room. ' The setpoints for the radiation monitors shall be l 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 environment:
i l
(1) The concentration of Argon-41 in the gaseous effluent dischcrge of the UPTR is determined by averaging it over a consecutive 30-day period.
(2) The dilution resulting from the operation oflthe stack dilution fan (flow rate of 10,000 cfm or more) and atmospheric dilution of the stack plume (a factor of 200) may bu taken into account when calculating this ' concen- :
tration.
(3) When calculatec as above, discharge concentration of Argon-41 shall not exceed MPC (4.0 x 10-Opc/ml). Operation of the UFTR shall be such that this maximum pennissible concentration (averaged over a month) is not ex-ceeded.
Table 3.3 Radiation Monitoring System Settings No. of Required Type Operable Functions Ala rm( s ) Setting Purpose Area Radiation 3 detecting 5 mr/hr low level Detect / alarm / record Monitors 2 audio alarming 25 mr/hr high level low and high level ,
2 recording external radiation Air Particulate 1 detecting Range adjusted ac- Detect / 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 / alarm / record 1 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 re-placed by suitable poratable instruments provided the intended function is being accomplished. Service, calibration, and testing interruptions for brief periods are permissible when the reactor is not in operation.
3.4.3 Reactor Vent / Stack Monitoring System (1) whenever the reactor vent system is operating, air drawn through the reactor vent system shall be continuously monitored for gross concentra-tion of radioactive gases. The output of the monitor shall be indicated and recorded in the control room.
(2) The reactor air cavity flow shall be periodically analyzed to minimize Argon-41 releases to the . environment while maintaining a negative pres-sure within the reactor cavity to minimize radioactive hazards to reactor personnel.
Amendment 17 {
r 11 l
l i
i 3.4.4 Air Particulate Monitor The reactor cell environment shall be monitored by at least one air particu-late monitor, capable of audibly warning personnel of radioactive particulate airborne contamination in the cell atmosphere. ;
3.4.5 Liquid Effluents' Discharge I
(1) The liquid waste f rom the radioactive liquid waste holding tanks shall be sampled and the activity measured before release to the sanitary sewage !
system.
J (2) Releases of radioactive liquid waste from the holding tanks / campus sani-tary sewage system shall be in compliance with the limits specified in 10 j CFR 20, Appendix B, Table 1, Column 2, as specified in 10 CPR 20.303. l I
~
3.4.6 Solid Radioactive Waste Disposal Solid radioactive waste disposal shall be accomplished in compliance with ap- j plicable regulations and under the control of the Radiation Control Office of the University of Florida. l l
1 3.4.7 Bases l The area radiation monitoring system, stack monitoring system and air particu- i late detector provide information to the operator indicating radiation and l airborne contamination levels under the full range of operating conditions.
~
Audible indicators and alarm lights indicate (via monitored parameters) when corrective operator action is required, and (in the case of the area radiation monitors) a warning light indicates situations recommending or requiring spe-cial operator attrntion and evaluation. Argon-41 discharges are limited to a monthly average which is less than the unrestricted area limit, and liquid and solid radioactive wastes are regula :ed and controlled to assure compliance with legal requirements.
3.5 Limitations on Experiments Applicability: These specifications apply to all experiments or experimental devices installed in the reactor core or its experimental facilities.
Objectives: The objectives are to maintain operational safety and prevent damage to the reactor f acility, reactor f uel, reactor core, and associated equipment; to prevent exceeding the reactor safety limits; and to minimize po-tential hazards f rom experimental devices.
Specifications:
(1) General The reactor manager and the radiation control officer (or their duly ap-pointed representative) 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 ovaluation of the safety aspects of new experiments and all changes to the facility that may be necessitated by the requirements of the experiments 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
-l l
l l
i ATTACHMENT II I
UFTR TECH SPEC I Pages 10-12 As Previously Approved
'l
range drawer. The wide range' drawer provides protection _during'startup through the source count rate interlock (2 cps),10-sec period inhibit:and the 3-sec period trip. The primary and secondary coolant flow rate, temperature and level sensing instrumentation provides information and protection over the entire range of reactor operations and is proven to be conservative from a safety view- l point. The key switch prevents unauthorized operation of the reactor and is.an l additional full trip (manual scram) control available to the operator. The core 4 level ~ trip provides redundant protection to-the primary 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 l
These specifications apply to the equipment required for controlled release of-gaseous radioactive effluent to the environment vialthe stack or its confine- )
ment within the reactor cell.
'3.3.1 Specification (1) - The' reactor vent' system shall be capable of ma'intaining an air flow rate
. between 1 and 400 cfm from the reactor cavity whenever the reactor is "
operating and as specified in these Technical Specifications. The reactor l air cavity flow shall be periodically calibrated 'to minimize argon-41 !
releases to the environment while maintaining a negative pressure within the reactor cavity to minimize radioactive hazards to reactor personnel' .
)
(2) The diluting fan shall be operated whenever the reactor is in operation .!
and as otherwise specified in these Technical Specifications, at an- '
exhaust flow rate larger than 10,000 cfm.
(3) The air conditioning / ventilation system and reactor vent systems are auto-matically shut off whenever the reactor building evacuation alarm is auto-matically.or manually actuated.
(4) All doors to the reactor cell shall normally be closed while the reactor is operating. Transit is not prohibited through air lock and control room doors.
3.3.2 Bases Undei normal conditions, to effect. controlled release of gaseous activity 'through the reactor vent system, a negative cell pressure is required so that any build-ing leakage will be inward. Under emergency conditions, the reactor vent system will be shut down and the damper closed, thus minimizing leakage of radioactivity from the reactor cell.
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 Amendment 15 10
1
. j l i recorded'in the control room. The set points for the radiation monitors shall be in'accordance with Table 3.3 l 3.4.2 Argon-41 Discharge .I The following' operational limits are specified .for the discharge of argon-41.
to the environment:
]
1 (1) The concentration of argon-41 in the gaseous effluent dis' charge of the !
UFTR is determined by averaging it over a consecutive 30-day peried. q 1
(2) The dilut' ion resulting from the operation of.the stack dilution fan (flow l rate of 10,000 cfm or more) and atmospheric d,ilution of the stack plume (a factor of 200) may be taken 1nto account when calculating this-concentratio,n. *
.)
(3) When calculated as above, discharge concentration.of argon-41 shall not i exceed MPC (4.0 x 10 8pc/ml). Operation of .the UFTR shall be such that j this maximum permissible concentration (averaged over a month) is not l exceeded. !
Table 3.3 Radiation monitoring system settings ')
1 h
Type No. of required .
operable functions Alarm (s) setting Purpose 1 i
Area radiation 3 detecting 5 mr/hr low level Detect / alarm /reco'rd f monitors 2 audio alarming . 25 mr/hr high level low and.high level i 2 recording external radiation Air particulate 1 detecting Range adjusted .
Detect / alarm / record }
monitors 1 audio alarming according to APD* airborne radioactivity 1 recording type (according in the reactor cell to monitoring requirements) I Stack radiation 1 detecting .(1) Fixed alarm at Detect / alarm / record monitor 1 audio alarming 4000 cps release of g'aseous I recording (2) Adjustable radioactive effluents alarm as per in'the reactor vent -
I power level duct'to the environs ;
- Air li articulate detector '
Notes: For maintenance or repair, the requi' red radiatior. monitors may be replaced by suitable portable instruments provid2 the intended function is being :
accomplished.
Service, calibration, and testing interruptions for brief periods are ' '
permissible when the reactor is not in operation.
11
3.4.3 Reactor Vent System .
The reactor vent system shall be operated at all times during reactor operation. )
j in addition, the vent system shall be operated until the stack monitor indicates j less than 10 counts per second (cps). Whenever the reactor vent system is operat- i ing, air drawn through the reactor vent system shall be continuously monitored !
for gross concentration of radioactive gases. The output of the monitor shall be j indicated and recorded in the control room. The reactor vent system shall be immediately secured upon detection of: a failure in the monitoring system, a {
j failure of the absolute filter, or an unanticipated high stack count rate.
J 3.4.4 Air Particulate Monitor The reactor cell environment shall be monitored by at least one air particulate i monitor, capable of audibly warning personnel of radioactive particulate airborne l contamination in the cell atmosphere. I 3.4.5 I Liquid Effluents Discharge !
(1) The liquid waste from the radioactive liquid waste holding tanks shall be ;
sampled and the activity measured.before release to the sanitary sewage system. {
l (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 CFR 20.303, 3.4.6 Solid Radioactive Waste Disposal '
Solid radioactive waste disposal shall be accomplished in compliance with appli-cable regulations and under the control of the Radiation Control Office of the University of Florida.
3.5 Limitations on Experiments i
I Applicability: These specifications apply to all experiments or experimental devices installed in the reactor core or its experimental facilities. ,
Objectives:
The objectives are to maictain operational safety and prevent damage to the reactor facility, reactor fuel., reactor core, and associated equipment; ,
to prevent from exceeding experimental the reactor safety limits; and to minimize potential hazards devices. J Specifications:
(1) Genera) .
The reactor manager and the radiation ~ control officer (or their duly appointed representative) shall review and approve in writing all proposed experiment's 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 experiments and that may have safety significance. When experiments contain substances that ir-radiation in the reactor can convert into a material with significant 12 Amendment No. 16
r 4 l
j
- )
}
i 9
' \I 1 r
1 y -d ATTACHMENT II. ,
Ef Li REPORT TO NRC REGION II December 19, Iggg 9:
' .l 4
i j
t' l
. ,t; ' m; A
4 i
l1 0,I
..L<
.