ML20155F528
| ML20155F528 | |
| Person / Time | |
|---|---|
| Site: | University of Utah |
| Issue date: | 11/02/1998 |
| From: | UTAH, UNIV. OF, SALT LAKE CITY, UT |
| To: | |
| Shared Package | |
| ML20155F526 | List: |
| References | |
| NUDOCS 9811060057 | |
| Download: ML20155F528 (6) | |
Text
._
l (3) A channel calibration shall be made of the power level monitoring ,
channels by either nuclear or calorimetric methods annually, but l at intervals not to exceed 15 months.
(4) A channel test of the temperature measuring channel shall be performed semiannually, but at intervals not to exceed 8 months.
Basis: Measurement of the scram time on an annual basis is a check not !
oniy of the scram system electronics, but also is an indication of the capability of the contre.,1 rods to perform properly. The channel tests will ensure that the safety system channels are operable on a daily basis or before an extended run. The power level channel calibration will i
ensure that the reactor will be operated at the proper power levels.
'?
4.3.3 Radiation Monitoring System
.s Aeolicability: This specification applies to the surveillance require-ments for the area radiation me.L'toring equipment and the continuous e
air monitoring system. ,
Objectives: The objectives are to ensure that the radiation monitoring equipment is operating and to verify the appropriate alarm settings.
Soecification: The area radiation monitoring system and the continuous air monitoring system shall be calibrated biennially and shall be verified to be operable at monthly intervals.
i Basis: Experience has shown that monthly verification of area radiation and air-monitoring system setpoints in conjunction with annual calibration is adequate to correct for any variation in the system caused by a change of operating characteristics over a long timespan.
i 4.3.4 Ventilation System Aeolicability: This specification appifes to the reactor room ventilation system.
Objective: The objective is to assureTha~tlhe ventilation system is in operation to mitigate the consequences of the possible release of radio-active materials resulting from reactor operation.
Soecification: The reactor shall not be operated unless the reactor room ventilation system is in operation, establishing a negative air pressure within the reactor room, except for periods of time not to exceed 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> to permit repair of the system.
Basis: It is shown that during nornal operation of the ventilation system tne concentration of argon 41 in unrestricted areas is below MPC. In the event of a substantial release of fission products, the ventilation system will be secured automatically. Therefore, operation of the reactor with the ventilation system shutdown for short periods of time to make repairs
. 18 Amendment No. 5 9811060057 981102
- PDR ADOCK 05000407 P Py
~ _ - - .. - .- . - - - - - - - . - . . - . _ . - - . - . . . . ~ . - - . - . . -.
4 (3) A channel calibration shall be made of the power level monitoring channels by either nuclear or calorimetric methods annually, but at intervals not to exceed 15 months. -
(4) A channel test of the temperature measuring channel shall be perfonned semiannually, but at intervals not to exceed 8 months. ;
Basis.: Measurements of the scram time on an annual basis is a check not only of the scram system electronics, but also is an indication of the capability of the control rods to perform ,
properly. The channel tests will ensure that the safety system channels are operable on a daily basis or before an extended mn. The power level channel calibration will ensure that the reactor will be operated at the proper power levels.
> 4.3.3 Radiation Monitorine System !
Anolicability: This specification ap) lies to the surveillance requirements for the area radiation monitoring equipment anc. the continuous air momtoring system. ,
)
Obiectives: The objectives are to ensure that the radiation monitoring equipment is i operating and to verify the appropriate alarm settings. l Specification: The area radiation monitoring system and the continuous air monitoring ]
system shall be calibrated annually and shall be verified to be operable at monthly intervals. !
Basis: Experience has shown that monthly verification of area radiation and air -
monitoring system setpoints in conjunction with annual calibration is adequate to correct for !
any variation in the system caused by a change of operating characteristics over a long I timespan.
4.3.4 Ventilation System Applicability: This specification applies to the reactor room ventilation system.
Obiective: The objective is to assure that the ventilation system is in operation to mitigate i the consequences of the possible release of radioactive materials resulting from reactor operation.
Soecification: The reactor shall not be operated unless the reactor room ventilation system
- - is in operation, establishing a negative air pressure within the reactor room, except for !
periods of time not to exceed 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> to permit repair of the system. ,
Basis: It is shown that during normal operation of the ventilation system the concentration of argon -41 in unrestricted areas is below MPC. In the event of a substantial release of
, fission products, the ventilation system will be secured automatically. Therefore, operation of the reactor with the ventilation system shutdown for short periods of time to make repairs C
Amendment No. 7
_ _ . __ ___ __ _. _ _ _ ~ . _ _ _ _ _ . _ - _ . _ _ . . _ _ . ._
(3) A channel calibration shall be made of the power level monitoring channels by either nuclear or calorimetric methods annually, but at inter als not to exceed 15 months.
(4) A channel test of the temperature measuring channel shall be performed semiannually, but at intervals not to exceed 8 months.
Basis.: Measurements of the scram time on an annual basis is a check not only of the scram l system electronics, but also is an indication of the capability of the control rods to perform properly. He channel tests will ensure that the safety system channels are operable on a daily basis or before an extended run. The power level channel calibration will ensure that the mactor will be operated at the proper power levels.
)
i 4.3.3 Rndintion Monitorine System I Applicability: This specification ap) lies to the surveillance requirements for the area radiation monitoring equipment anc the continuous air monitoring system.
Obiectives: The objectives are to ensure that the radiation monitoring equipment is operating and to verify the appropriate alarm settings.
Specification: The area radiation monitoring system and the continuous air monitoring l system shall be calibrated annually and shall be verified to be operable at monthly intervals.
Basis *. Experience has shown that monthly verification of area radiation and air -
E monitoring system setpoints in conjunction with annual calibration is adequate to correct for any variation in the system caused by a change of operating characteristics over a long timespan.
4.3.4 Ventilation System Anglicability: his specification applies to the reactor room ventilation system.
Obiective: The objective is to assure that the ventilation system is in operation to mitigate the consequences of the possible release of radioactive materials resulting from reactor operation.
_ Specification: The reactor shall not be operated unless the reactor room ventilation system is in operation, establishing a negative air pressure within the reactor room, except for
. periods of time not to exceed 48 hours5.555556e-4 days <br />0.0133 hours <br />7.936508e-5 weeks <br />1.8264e-5 months <br /> to permit repair of the system.
Basis: It is shown that during normal operation of the ventilation system the concentration of argon -41 in unrestricted areas is below MPC. In the event of a substantial release of fission products, the ventilation system will be secumd automatically. Therefore, operation of the reactor with the ventilation system shutdown for short periods of time to make repairs i
la Amendment No. 7
l l
i 9pecifications: .
l (1) Function of Area Radiation Monitor (gama-sensitive instruments): ,
l Monitor ractation fields in key locations, alarm and readout at control console.
l (2) Function of Continuous Air Radiation Menitor (beta , gama-sen-sitive, detector witn partituiate collection capability): Monitor concentration of radioactive particulate activity in the pool j room, alarm and readout at control console. .
t (3) Function of Argen 41 Stack Monitor (gama-sensitive detector): 7 Monitors tne concentration of racioactive gases including argon-41 in the building ' exhaust, alarm and readout at console. 4 Basis: The radiation monitoring syptem is intended to provide information I to operating personnel of any impaci.ng pr existing danger from radiation a so that there will be sufficient 1%Nto evacuate the facility and take l Bhe necessary steps to prevent the spread of radioactivity to the sur-roundings. '
5.5 Fuel Storage Acolicability: This specification applies to the storage of reactor fuel i at times =nen it is not in the reactor core. 1 Objective: The objective is to ensure that fuel that is being stored will not become critical and will not reach an unsafe temperature.
Soecifications:
(L) All fuel elements shall be stored in a geometrical array where the kefr is less than 0.8 for all conditi)ns of moderation.
~
(2) Irradiated fuel elements and fueled devices shall be stored in , , _
an array, which will permit sufficient natural convection cooling ;
by water or air, so that the fuel element or fueled device i temperature will not exceed design values. '~~ ~~
Basis: The limits imposed by Specifications 5.5(1) and 5.5(2) are conservative and ensure safe storage of reactor fuel.
1 5.6 Reactor Building and Ventilation System Acolicability: This specification applies to the building that houses tne reactor.
Objective: The objective is to ensure that provisions are made to .,
l restrict the amount of radioa cti vity released into the environment, j{
iI I
23 klenc:ent No. 5
_~ . .. . . . > _ . , _ . . _ . _ _ _ _ . . _ _ _ _ - _ - _ .. _ _ . _ . . ~ . _ -
l
"-)
Soecifications:
i
-(1) Function of Area Radiation Monitor (gamma-sensitive instruments):
Monitor radiation fields in key locations, alarm and readout at control console.
(2) Function of Continuous Air Radiation Monitor (beta , gamma-sensitive detector with paniculate collection capability): Monitors concentration of l radioactive particulate activity and radioactive gases including Argon-41 in the building exhaust, alarm and readout at control console. .
l l
l Basis: The radiation monitoring system is intended to provide information to operating
]
- personnel of any impending or existing danger from radiation so that there will be sufficient j time to evacuate the facility and take the necessary steps to prevent the spread of ;
i radioactivity to the surroundings.
5.5 Fuel storace -
' Anolicability : This specification applies to the storage of reactor fuel at times when it is not in the reactor core. l Obiective: The objective is to ensure that fuel that is being stored will not become critical and will not reach an unsafe temperature.
l
- Specifications
- )
(1) All fuel elements shall be stored in a geometrical array where the keff is less than 0.8 for all conditions of moderation.
(2) Irradiated fuel elements and fueled devices shall be stored in an array, which will permit sufficient natural convection cooling by water or air, so that the fuel element or fueled device temperature will not exceed design values.
l Basis The limits imposed by the Specifications 5.5(1) and 5.5(2) are conservative and ensure safe storage of reactor fuel.
- 5.6 Reactor Buildine and Ventilation System .
Anoticability: This specification applies to the building that houses the reactor.
Obiective: The objective is to ensure that provisions are made to restrict the amount of
- radioactivity released into the environment.
l L
l F
y '23 r
l- ~ Amendment No. 7.
i
- . , . _ ~ ._. .-. --- . . . . . - - . . . . . . _ . . . -.
- ., 1
.- l
. . -. 1 Specifications:
(1) Function of Area Radiation Monitor (gamma-sensitive instruments):
Monitor radiation fields in key locations, alarm and tradout at control console.
(2) Function of Continuous Air Radiation Monitor (beta , gamma-sensitive detector with particulate collection capability): Monitors concentration of radioactive particulate activity and radioactive gases including Argon-41 in the building exhaust, alarm and readout at control console.
Basis; The radiation monitoring system is intended to ?rovide information to operating personnel of any impending or existing danger from rac iation so that there will be sufficient time to evacuate the facility and take the necessary steps to prevent the spread of radioactivity to the surroundings.
5 5 Fuel storage Apnlienhility : His specification applies to the storage of reactor fuel at times when it is not in the reactor core.
Obiective: The objective is to ensure that fuel that is being stored will not become critical
- and will not reach an unsafe temperature.
Specifications :
(1) All fuel elements shall be stored in a geometrical arrey where the keff is less than 0.8 for all conditions of moderation. .
(2) Irradiated fuel elements and fueled devices shall be stored in an array,
- which will permit sufficient natural convection cooling by water or air, so that the fuel element or fueled device temperature will not exceed design values.
4 Basis: The limits imposed by the Specifications 5.5(1) and 5.5(2) are conservative and ensure safe storage of reactor fuel.
5.6 Reactor Buildine and Ventilation System Applicability: This specification applies to the building that houses the reactor.
' Obiective: The objective is to ensure that provisions are made to restrict the amount of radioactivity irleased into the environment.
23 Amendment No. 7
. . ..-. _. _ .