ML20195H996
| ML20195H996 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 06/11/1999 |
| From: | Emch R NRC (Affiliation Not Assigned) |
| To: | |
| Shared Package | |
| ML20195J005 | List: |
| References | |
| NUDOCS 9906180055 | |
| Download: ML20195H996 (21) | |
Text
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UNITED 3TATES l
{
, j NUCLEAR REGULATORY COMMISSION
' s WASHINGTON, D.C. 20555 4001 49.....,o DUKE ENERGY CORPORATION DOCKET NO. 50-369 McGUIRE NUCLEAR STATION. UNIT 1 AMENDMENT TO FACILITY OPERATING LICENSE
, Amendment No.185 License No. NPF-9
- 1. The Nuclear Regulatory Commission (the Commission) has found that:
A.
The application for amendment to the McGuire Nuclear Station, Unit 1 (the facility), Facility Operating License No. NPF-9 filed by the Duke Energy Corporation (licensee) dated June 10,1999, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Commission's rules and regulations as set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the Comm'. sion's regulations set forth in 10 CFR Chapter I; D.
The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
9906180055 990611 PDR ADOCK 05000369 P
l 1 2.
Accordingly, the license is hereby amended by page changes to the Technical Specifications as indicated in the attachment to this license amendment, and Paragraph j
2.C.(2) of Facility Operating License No. NPF-9 is hereby amended to read as follows:
)
(2)
Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No. 185, are hereby incorporated into this license. The licensee shall operate the facility in accordance with the Technical Specifications.
3.
This license amendment is effective as of its da;e of issuance and is to be implemented on the date of issuance.
FOR THE NUCLEAR REGULATORY COMMISSION Richard L. Emch, Jr., Chief, Section 1 Project Directorate il Division of Licensing Project Management i
Office of Nuclear Reactor Regulation i
Attachment:
Technical Specification Changes Date of Issuance:
June 11, 1999
i i
j ATTACHMENT TO LICENSE AMENDMENT NO.185 FACILITY OPERATING LICENSE NO. NPF-9 DOCKET NO. 50-369 Replace the following pages of the Appendix A Technical Specifications with the attached revised pages. The revised pages are identified by amendment number and contains vertical lines indicating the areas of change.
Remove Insert 3.7.9-1 3.7.9-1 3.7.9-2 3.7.9-2 B 3.7.9-3 B 3.7.9-3 8 3.7.9-4 B 3.7.9-4 8 3.7.9-5 B 3.7.9-5 B 3.7.9-6 B 3.7.9-7 i
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CRAVS 3.7.9 3.7 PLANT SYSTEMS 3.7.9 Control Room Area Ventilation' System (CRAVS)
- Two CRAVS trains shall be OPERABLE.
.........................-----NOTE *-----------------------------------
The control room boundary may be opened intermittently under administrative control.
APPLICABILITY:
MODES 1,2,3,4,5, and 6, During movement of irradiated fuel assemblies, During CORE ALTERATIONS.
ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A.
One CRAVS train A.1 Restore CRAVS train to 7 days inoperable.
OPERABLE status.
j B.
Required Action and B.1 Be in MODE 3.
6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> I
associated Completion
)
Time of Condition A not ANN _Q met in MODE 1,2,3, or 4.
B.2.
Be in MODE 5.
36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />
)
C.
Required Action and C.1 Place OPERABLE CRAVS Immediately
)
associated Completion train in emergency mode.
Time of Condition A not met in MODE 5 or 6, or QB during movement of -
irradiated fuel assemblies, or during CORE ALTERATIONS.
(continued)
- This note is a one time only allowance to be used to complete repairs to CRAVS train B.
l McGuire Units 1 and 2 3.7.9-1 Amendment Nos. 104/100,185/167
l CRAVS l
3.7.9
{
ACTIONS CONDITION REQUIRED ACTION-COMPLETION TIME C.
l(continued)
C.2.1 Suspend CORE immediately ALTERATIONS.
ANQ C.2.2 Suspend movement of immediately irradiated fuel assemblies.
D.
Two CRAVS trains -
D.1 Suspend CORE immediately inoperable in MODE 5 ALTERATIONS.
or 6, or during movement of irradiated AND fuel assemblies, or during CORE D.2' Suspend movement of Immediately ALTERATIONS.
Irradiated fuel assemblies.
E.
Two CRAVS trains E.1 Enter LCO 3.0.3.
Immediately inoperable in MODE 1, 2,3, or 4 (for reasons I
other than Condition G)*.
F.
One or more CRAVS F.1 Restore CRAVS train (s) ~
7 days train (s) heater heater to OPERABLE inoperable.
status.
4
.QB F.2 initiate action in 7 days accordance with Specification 5.6.6.
l l
G.*
Two CRAVS trains G.1 Restore control room 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> inoperable due to boundary to OPERABLE -
inoperable control room status.
boundary in MODE 1,2, 3, or 4.
This is a one time only allowance to be used to complete repairs to CRAVS train B.
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McGuire Units 1 and 2 3.7.9-2 Amendment Nos. +84/466,185/167
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CRAVS B 3.7.9 BASES LCO (continued) a.
An Outside Air Pressure Filter Train fan and a Control Room Air Handling unit are OPERABLE; b.
HEPA filters and charcoal adsorbers are not excessively restricting flow, and are capable of performing their filtration functions; and c.
Ductwork, valves, and dampers are OPERABLE, and air circulation can be maintained.
In addition, the control room boundary must be maintained, including the integrity of the walls, floors, ceilings, ductwork, and access doors.
The CRAVS is shared between the two units. The system must be OPERABLE for each unit when that unit is in the MODE of Applicability.
Additionally, both normal and emergency power must also be i
OPERABLE because the system is shared. If a CRAVS component becomes inoperable, or normal or emergency power to a CRAVS component becomes inoperable, then the Required Actions of this LCO must be entered independently for each unit that is in the MODE of applicability of the LCO.
The LCO is modified by a Note allowing the control room boundary to be opened intermittently under administrative controls. For entry and exit through doors, the administrative control of the opening is performed by the person (s) entering or exiting the area. For other openings, these controls consist of stationing a dedicated individual at the opening who is in continuous communication with the control room. This individual will have a method to rapidly close the opening when a need for control room area isolation is indicated.*
APPLICABILITY In MODES 1,2,3,4,5, and 6, and during movement of irradiated fuel assemblies and during CORE ALTERATIONS, CRAVS must be OPERABLE to control operator exposure during and following a DBA.
During movement of irradiated fuel assemblies and CORE i
ALTERATIONS, the CRAVS must be OPERABLE to cope with the release from a fuel handling accident.
l
- This is a one time only allowance to be used to complete repairs to CRAVS train B.
l McGuire Units 1 and 2 B 3.7.9-3 Revision No. 0,4 r
I' CRAVS B 3.7.9 BASES ACTIONS AJ.
When one CRAVS train is inoperable, action must be taken to restore OPERABLE status within 7 days. In this Condition, the remaining OPERABLE CRAVS train is adequate to perform the control room protection function. However, the overall reliability is reduced because a single failure in the OPERABLE CRAVS train could result in loss of CRAVS function. The 7 day Completion Time is based on the low probability of a DBA occurring during this time period, and ability of the remaining train to provide the required capability.
B.1 and B.2 in MODE 1,2,3, or 4, if the inoperable CRAVS train cannot be restored to OPERABLE status within the required Completion Time, the unit must be placed in a MODE that minimizes accident risk. To achieve this status, the unit must be placed in at least MODE 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in MODE 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The allowed Completion Times are reasonable, based on operating experience, to reach the required unit conditions from full power conditions in an orderly manner and without challenging unit systems.
C.1. C.2.1. and C.2.2 in MODE 5 or 6, or during movement of irradiated fuel assemblies, or during CORE ALTERATIONS,if the inoperable CRAVS train cannot be restored to OPERABLE status within the required Completion Time, action must be taken to immediately place the OPERABLE CRAVS train in the emergency mode. This action ensures that the remaining train is OPERABLE, that no failures preventing automatic actuation will occur, and that any active failure would be readily detected. An alternative to Required Action C.1 is to immediately suspend activities that could result in a release of radioactivity that might require isolation of the control room. This places the unit in a condition that minimizes risk. This does not preclude the movement of fuel to a safe position.
D.1 and D.2 in MODE 5 or 6, or during movement of irradiated fuel assemblies, or during CORE ALTERATIONS, with two CRAVS trains inoperable, action must be taken immediately to suspend activities that could result in a release of radioactivity that might enter the control room. This places the McGuire Units 1 and'2 B 3.7.9-4 Revision No. 0,4 l
U CRAVS B 3.7.9 BASES-
\\
-- ACTIONS (continued) l unit in a condition that minimizes accident risk. This does not preclude the movement of fuel to a safe position.
El if both CRAVS trains are inoperable in MODE 1,2,3, or 4 (for reasons other than Condition G)*, the CRAVS may not be_ capable of performing the intended function and the unit is in a condition outside the accident analyses. Therefore, LCO 3.0.3 must be entered immediately.
F.1 and F.2 Action F.1 allows one or more CRAVS heater inoperable, with the heater restored to OPERABLE status within 7 days. Alternatively, Action F.2 requires if the heater is not returned to OPERABLE within the 7 days, a report to be initiated per Specification 5.6.6, which details the reason for the heater's inoperability and the corrective action required to return the heater to OPERABLE status.
The heaters do not affect OPERABILITY of the CRAVS filter train i
because charcoal absorber efficiency testing is performed at 30*C and 90
% relative humidity. The accident analysis shows that site boundary j
radiation doses are with;n 10 CFR 100 limits during a DBA LOCA under these conditions.
l
.Qd if the control room boundary is inoperable in MODES 1,2,3, or 4 such that the CRAVS trains can not establish or maintain the required pressure, action must be taken to restore an OPERABLE control room boundary within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Completion Time is reasonable based on the low probability of a DBA occurring during this time period, the availability of the CRAVS to provide a filtered environment (albeit with i
potential control room inleakage), and compensatory measures available to the operator to minimize doses (e.g. self contained breathing apparatus and alternate control room air intakos).*
i
- This is a one time only allowance to be used to complete repairs to CRAVS train B.
l McGuire Units 1 and 2 B 3.7.9-5 Revision No. 0,4
o s
CRAVS B 3.7.9 3
i BASES SURVElLLANCE SR 3.7.9.1 REQUIREMENTS Standby systems should be checked periodically to ensure that they function properly. As the environment and. normal operating conditions on this system are not too severe, testing each train once every month provides an adequate check of this system. Monthly heater operations dry out any moisture accumulated in the charcoal from humidity in the ambient air. Systems with heaters must be operated from the control room for 210 continuous hours with the heaters energized and flow through the HEPA filters and charcoal adsorbers. The 31 day Frequency is based on the reliability of the equipment and the two train redundancy availability.
SR 3.7.9.2 This SR verifies that the required CRAVS testing is performed in accordance with the Ventilation Filter Testing Program (VFTP). The CRAVS filter tests are in accordance with Regulatory Guide 1.52 (Ref. 4).
The VFTP includes testing the performance of the HEPA filter, charcoal adsorber efficiency, minimum flow rate, and the physical properties of the activated charcoal. Specific test Frequencies and additionalinformation are discussed in detailin the VFTP.
SR 3.7.9.3 This SR verifies that each CRAVS train starts and operates with flow j
through the HEPA filters and charcoal adsorbers on an actual or simulated actuation signal. The Frequency of 18 months is specified in i
Regulatory Guide 1.52 (Ref. 4).
SR 3.7.9.4 This SR verifies the integrity of the control room enclosure, and the assumed inleakage rates of the potentially contaminated air. The control room positive pressure, with respect to potentially contaminated adjacent areas, is periodically tested to verify proper functioning of the CRAVS.
During the emergency mode of operation, the CRAVS is designed to pressurize the control room 2 0.125 inches water gauge positive pressure with respect to atmospheric pressure in order to prevent unfiltered inteakage. The CRAVS is designed to maintain this positive pressure with one train at a makeup flow rate of s 2200 cim. The Frequency of 18 months on a STAGGERED TEST BASIS is consistent with the guidance provided in NUREG-0800 (Ref. 5).
McGuire Units 1 and 2 B 3.7.9-6 Revision No. 0,4
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CRAVS B 3.7.9 BASES l
REFERENCES 1.
UFSAR, Section 6.4.
2.
UFSAR, Chapter 15.
3.~
.10 CFR 50.37, Technical Specifications, (c)(2)(ii).
4.
Regulatory Guide 1.52, Rev. 2.
5.
NUREG-0800, Sec' >n 6.4, Rev. 2, July 1981.
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l McGuire Units 1 and 2 B 3.7.9-7 Revision No. 0,4
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t UNITED STATLS j
,j NUCLEAR REGULATORY COMMISSION WASHINGTON. D.C. 205554 01 i
49.....,o DUKE ENERGY CORPORATION DOCKET NO. 50-370 McGUIRE NUCLEAR STATION. UNIT 2 AMENDMENT TO FACILITY OPERATING LICENSE Amendment No.167 License No. NPF-17 1.
The Nuclear Regulatory Commission (the Commission) has found that:
{
l A.
The application for amendment to the McGuire Nuclear Station, Unit 2 (the facility), Facility Operating License No. NPF-17 filed by the Duke Energy Corporation (licensee) dated June 10,1999, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the I
Commission's rules and regulations as set forth in 10 CFR Chapter I; B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, and (ii) that such activities will be conducted in compliance with the J
Commission's regulations set forth in 10 CFR Chapter I; D.
The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public; and E.
The issuance of this amendment is in accordance with 10 CFR Part 51 of the Commission's regulations and all applicable requirements have been satisfied.
J
l l
! l 2.
Accordingly, the license is hereby amended by page changes to the Technical Specifications as indicated in the attachment to this license amendment, and Paragraph 2.C.(2) of Facility Operating License No. NPF-17 is hereby amended to read as follows:
(2)
Technical Specifications The Technical Specifications contained in Appendix A, as revised through Amendment No.167, are hereby incorporated into this license. The i
licensee shall operate the facility in accordance with the Technical Specifications.
3.
This license amendment is effective as of its date of issuance and is to be implemented on the date of issuance.
FOR THE NUCLEAR REGULATORY COMMISSION AukJx. cad,.
Richard L. Emch, Jr., Chief, Section 1 Project Directorate il I
Division of Licensing Project Management Office of Nuclear Reactor Regulation
Attachment:
Technical Specification Changes Date of issuance: June 11, 1999
p-l I
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ATTACHMENT TO LICENSE AMENDMENT NO.167 FACILITY OPERATING LICENSE NO. NPF-17 l
DOCKET NO. 50-370 Replace the following pages of the Appendix A Technical Specifications with the attached revised pages..The revised pages are identified by amendment number and contains vertical lines indicating the areas of change.
Remove Insert 3.7.9-1 3.7.9-1 3.7.9-2 3.7.9-2 B 3.7.9-3 B 3.7.9-3 B 3.7.9-4 B 3.7.9-4 B 3.7.9-5 B 3.7.9-5 B 3.7.9-6 B 3.7.9-7 l
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l CRAVS 3.7.9 3.7 PLANT SYSTEMS 3.7.9 Control Room Area Ventilation System (CRAVS)
' Two CRAVS trains shall be OPERABLE.
l
-- N OT E *---------
The control room boundary may be opened intermittently under administrative control.
APPLICABILITY:
MC OES 1, 2, 3, 4, 5, and 6, D'::ing movement of irradiated fuel assemblies, Du'nng CORE ALTERATIONS.
ACTIONS i
CONDITION REQUIRED ACTION COMPLETION TIME i
A.
One CRAVS train A.1 Restore CRAVS train to 7 days inoperable.
OPERABLE status.
B.
Required Action and B.1 Be in MODE 3.
6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br /> associated Completion i
Time of Condition A not AND met in MODE 1,2,3, i
or 4.
B.2 Be in MODE 5.
36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br /> C.
Required Action and C.1 Place OPERABLE CRAVS Immediately associated Completion train in emergency mode.
Time of Condition A not met in MODE 5 or 6, or QR during movement of irradiated fuel assemblies, or during CORE ALTERATIONS.
(continued)
- This note is a one time only allowance to be used to complete repairs to CRAVS train B.
l McGuire Units 1 and 2 3.7.9-1 Amendment Nos. 134/100,185/167
Fl.
L l
I CRAVS 3.7.9 ACTIONS '
' CONDITION REQUIRED ACTION COMPLETION TIME C..
(continued)
C.2.1 Suspend CORE Immediately ALTERATIONS.
ANR C.2.2 Suspend movement of Immediately irradiated fuel assemblies.
D.
_ Two CRAVS trains D.1 Suspend CORE immediately inoperable in MODE 5 ALTERATIONS.
or 6, or during movement of irradiated A_NR N
fuel assemblies, or during CORE _
D.2 Suspend movement of immediately ALTERATIONS.
Irradiated fuel assemblies.
I E.
Two CRAVS trains E.1 Enter LCO 3.0.3.
Immediately inoperable in MODE 1, 2,3, or 4 (for reasons other than Condition G)*.
F.
_ One or more CRAVS F.1 Restore CRAVS train (s) 7 days train (s) heater heater to OPERABLE inoperable.
status.
_QB F.2 Initiate action in 7 days accordance with Specification 5.6.6.
G.*
- Two CRAVS trains G.1 Restore control room 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> i
inoperable due to-boundary to OPERABLE inoperable control room status.
boundary in MODE 1,2, 3, or 4.
l
'This is a one time only allowance to be used to complete repairs to CRAVS train B.
l l
- McGuire Units 1 and 2 3.7.9 Amendment Nos. 104/100,185/167 lu-
c CRAVS B 3.7.9 BASES LCO (continued) a.
An Outside Air Pressure Filter Train fan and a Control Room Air Handling unit are OPERABLE; b.
HEPA filters and charcoal adsorbers are not excessively restricting flow, and are capable of performing their filtration functions; and c.
Ductwork, valves, and dampers are OPERABLE, and air circulation can be maintained.
In addition, the control room boundary must be maintained, including the integrity of the walls, floors, ceilings, ductwork, and access doors.
The CRAVS is shared between the two units. The system must be OPERABLE for each unit when that unit is in the MODE of Applicability.
Additionally, both normal and emergency power must also be OPERABLE because the system is shared. If a CRAVS component becomes inoperable, or normal or emergency power to a CRAVS component becomes inoperable, then the Required Actions of this LCO l
must be entered independently for each unit that is in the MODE of applicability of the LCO.
The LCO is modified by a Note allowing the control room boundary to be opened intermittently under administrative controls. For entry and exit through doors, the administrative control of the opening is performed by the person (s) entering or exiting the area. For other openings, these controls consist of stationing a dedicated individual at the opening who is in continuous communication with the control room. This individual will have a method to rapidly close the opening when a noed for control room area isolation is indicated.*
APPLICABILITY in MODES 1,2,3,4,5, and 6, and during movement of irradiated fuel assemblies and during CORE ALTERATIONS, CRAVS must be OPERABLE to control operator exposure during and following a DBA.
During movement of irradiated fuel assemblies and CORE ALTERATIONS, the CRAVS must be OPERABLE to cope with the release from a fuel handling accident.
- This is a one time only allowance to be used tc complete repairs to CRAVS train B.
l McGuire Units 1 and 2
- B 3.7.9-3 Revision No. 0,4
7 CRAVS B 3.7.9 BASES ACTIONS -
A_d
~ When one CRAVS train is inoperable, action must be taken to restore OPERABLE status within 7 days. In this Condition, the remaining OPERABLE CRAVS train is adequate to perform the control room protection function. However, the overall reliability is reduced because a single failure in the OPERABLE CRAVS train could result in loss of CRAVS function. The 7 day Completion Time is based on the low probability of a DBA occurring during this time period, and ability of the remaining train to provide the required capability.
S.1 and B.2 In MODE 1,2,3, or.4, if the inoperable CRAVS train cannot be restored to OPERABLE status within the required Completion Time, the unit must be placed in a MODE that minimizes accident risk. To achieve this status, the unit must be placed in at least MODE 3 within 6 hours6.944444e-5 days <br />0.00167 hours <br />9.920635e-6 weeks <br />2.283e-6 months <br />, and in MODE 5 within 36 hours4.166667e-4 days <br />0.01 hours <br />5.952381e-5 weeks <br />1.3698e-5 months <br />. The allowed Completion Times are reasonable, based on operating experience, to reach the required unit conditions from full power conditions in an orderly manner and without challenging unit systems.
C.1. C.2.1. and C.2.2 In MODE 5 or 6, or during movement of irradiated fuel assemblies, or
- during CORE ALTERATIONS, if the inoperable CRAVS train cannot be restored to OPERABLE status within the required Completion Time, action must be taken to immediately place the OPERABLE CRAVS train in the emergency mode. This action ensures that the remaining train is OPERABLE, that no failures preventing automatic actuation will occur, and that any active failure would be readily detected. An alternative to Required Action C.1 is to immediately suspend activities that could result in a release of radioactivity that might require isolation of the control room. This places the unit in a condition that minimizes risk. This does not preclude the movement of fuel to a safe position.
D.1 and D.2 In MODE 5 or 6, or during movement of irradiated fuel assemblies, or during CORE ALTERATIONS, with two CRAVS trains inoperable, action must be taken immediately to suspend activities that could result in a release of radioactivity that might enter the control room. This places the McGuire Units 1 and 2 B 3.7.9-4 Revision No. 0,4 I
l L
CRAVS B 3.7.9 I
BASES ACTIONS (continued) i unit in a condition that minimizes accident risk. This does not preclude the movement of fuel to a safe position.
1 El if both CRAVS trains are inoperable in MODE 1,2,3, or 4 (for reasons other than Condition G)*, the CRAVS may not be capable of performing the intended function and the unit is in a condition outside the accident analyses. Therefore, LCO 3.0.3 must be entered immediately.
F.1 and F.2 Action F.1 allows one or more CRAVS heater inoperable, with the heater restored to OPERABLE status within 7 days. Alternatively, Action F.2 requires if the heater is not returned to OPERABLE within the 7 days, a i
report to be initiated per Specification 5.6.6, which details the reason for
{
the heater's inoperability and the corrective action required to retum the
)
heater to OPERABLE status.
The heaters do not affect OPERABILITY of the CRAVS filter train 1
because charcoal absorber efficiency testing is performed at 30*C and 90
)
% relative humidity. The accident analysis shows that site boundary radiation doses are within 10 CFR 100 limits during a DBA LOCA under these conditions.
G.1 if the control room boundary is inoperable in MODES 1,2,3, or 4 such that the CRAVS trains can not establish or maintain the required pressure, action must be taken to restore an OPERABLE control room boundary within 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The 24 hour2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br /> Completion Time is reasonable based on the low probability of a DBA occurring during this time period, the availability of the CRAVS to provide a filtered environment (albeit with potential control room inleakage), and compensatory measures available i
to the operator to minimize doses (e.g. self contained breathing apparatus and alternate control room air intakes).*
i f
- This is a one time only allowance to be used to complete repairs to CRAVS train B.
I l
McGuire Units 1 and 2 B 3.7.9-5 Revision No. 0,4
m 9
I CRAVS B 3.7.9 c.
BASES 1
l SURVEILLANCE SR 3.7.9.1 REQUIREMENTS Standby systems should be checked periodically to ensure that they function properly. As the environment and normal operating conditions on this system are not too severe, testing each train once every month provides an adequate check of this system. Monthly heater operations dry out any moisture accumulated in the charcoal from humidity in the i
ambient air. Systems with heaters must be operated from the control room for 210 continuous hours with the heaters energized and flow through the HEPA filters and charcoal adsorbers. The 31 day Frequency is based on the reliability of the equipment and the two train redundancy availability.
SR 3.7.9.2 This SR verifies that the required CRAVS testing is performed in accordance with the Ventilation Filter Testing Program (VFTP). The CRAVS filter tests are in accordance with Regulatory Guide 1.52 (Ref. 4).
The VFTP includes testing the performance of the HEPA filter, charcoal adsorber efficiency, minimum flow rate, and the physical properties of the activated charcoal. Specific test Frequencies and additionalinformation are discussed in detailin the VFTP.
SR 3.7.9.3 This SR verifies that each CRAVS train starts and operates with flow
. through the HEPA filters and charcoal adsorbers on an actual or simulated actuation signal. The Frequency of 18 months is specified in
- Regulatory Guide 1.52 (Ref. 4).
SR 3.7.9.4 This SR verifies the integrity of the control room enclosure, and the assumed inleakage rates of the potentially contaminated air. The control room positive pressure, with respect to potentially contaminated adjacent areas, is periodically tested to verify proper functioning of the CRAVS.
During the emergency mode of operation, the CRAVS is designed to pressurize the control room 2 0.125 inches water gauge positive pressure with respect to atmospheric pressure in order to prevent unfiltered inleakage. The CRAVS is designed to maintain this positive pressure i
with one train at a makeup flow rate of s 2200 cfm. The Frequency of 18 months on a STAGGERED TEST BASIS is consistent with the guidance provided in NUREG-0800 (Ref. 5).
)-
McGuire Units 1 and 2 B 3.7.9-6 Revision No. 0,4
I CRAVS B 3.7.9 BASES-l REFERENCES 1.
UFSAR, Section 6.4.
i j
2.
UFSAR, Chapter 15.
3.
10 CFR 50.37, Technical Specifications, (c)(2)(ii).
4.
Regulatory Guide 1.52, Rev. 2.
5.
NUREG-0800, Section 6.4, Rev. 2, July 1981.
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McGuire Units 1 and 2 B 3.7.9-7 Revision No. 0,4