View source for TSTF-09-13, Response to April 17, 2009 Request for Additional Information Regarding TSTF-508, Revision 0, Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation.

{{Adams
| number = ML091690643
| issue date = 06/18/2009
| title = Response to April 17, 2009 Request for Additional Information Regarding TSTF-508, Revision 0, Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation.
| author name = Croft W, Messina J, Raidy T, Schrader K
| author affiliation = BWR Owners Group, PWR Owners Group, Technical Specifications Task Force
| addressee name = 
| addressee affiliation = NRC/Document Control Desk, NRC/NRR
| docket = PROJ0753
| license number = 
| contact person = 
| case reference number = TSTF-09-13
| document type = Letter type:TSTF
| page count = 61
| project = 
| stage = Request
}}

=Text=
{{#Wiki_filter:TECHNICAL SPECIFICATIONS TASK FORCE TSTF                                           A JOINT OWNERS GROUP ACTIVITY June 18, 2009                                                                       TSTF-09-13 PROJ0753 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555-0001

==SUBJECT:==
Response to April 17, 2009 Request for Additional Information Regarding TSTF-508, Revision 0, "Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation"

==REFERENCE:==
Letter from Joseph F. Williams (NRC) to the Technical Specifications Task Force, "Request for Additional Information Regarding TSTF-508, Revision 0,
                    'Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation'," dated April 17, 2009.

==Dear Sir or Madam:==

In the referenced letter, the NRC provided a Request for Additional Information (RAI) regarding TSTF-508, Revision 0, "Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation." This letter responds to the NRC's request.
TSTF-508 is revised to incorporate information requested in the RAI. TSTF-508, Revision 1, is attached.
Should you have any questions, please do not hesitate to contact us.
Kenneth J. Schrader (PWROG/W)                         John Messina (BWROG)
Thomas W. Raidy (PWROG/CE)                            Wendy E. Croft (PWROG/B&W)
Enclosure cc:     Robert Elliott, Technical Specifications Branch, NRC Joseph Williams, Special Projects Branch, NRC 11921 Rockville Pike, Suite 100, Rockville, MD 20852 Phone: 301-984-4400, Fax: 301-984-7600 Administered by EXCEL Services Corporation

Response to April 17, 2009 Request for Additional Information Regarding TSTF-508, Revision 0, "Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation" The NRC provided the following Request for Additional Information:
By letter dated July 3, 2008, the Pressurized Water Reactors Owners Group (PWROG) submitted TSTF-508, Revision 0, "Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation." As discussed below, the NRC staff has determined that additional information is needed to complete the review.
The Standard Technical Specifications (STS), as amended by TSTF-448, require immediate suspension of movement of irradiated fuel and immediate suspension of Operations with a Potential for Draining the Reactor Vessel (OPDRVs) for boiling water reactors (BWRs) when one or more Control Room Emergency Ventilation System/Control Room Emergency Filtration System/Control Room Emergency Air Cleanup System/Main Control Room Environmental Control/Control Room Fresh Air [CREVS / CREFS / CREACS / MCREC /
CRFA] subsystems is inoperable due to an inoperable control room envelope (CRE) boundary.
TSTF-508 contains 3 basic changes to the STS, as amended by TSTF-448. The changes are described on page 2 of TSTF-508 (Agencywide Documents Access and Management System (ADAMS) accession number ML081850420). This request for additional information pertains to the change described in paragraph "a" on page 2 of TSTF-508. Among other things, those changes provide a relaxation of the restrictions on movement of irradiated fuel and OPDRVs when one or more [CREVS/CREFS/CREACS/MCREC/CRFA] subsystems is inoperable due to an inoperable CRE boundary. The proposed changes allow operators to continue movement of irradiated fuel and continue OPDRVs for up to 90 days when one or more [CREVS/CREFS/CREACS/MCREC/CRFA] subsystems is inoperable due to an inoperable CRE boundary.
The second paragraph on page 5 of TSTF-508 (Technical Analysis) provides justification for the relaxation of the restrictions on fuel movement and OPDRVs. The first justification states: "First, suspension of fuel movement is unnecessary if Required Action B.2 verifies that the required mitigating actions protect the CRE occupants, just as is required in the operating Modes." When one or more [CREVS/CREFS/CREACS/MCREC/CRFA]
subsystems is inoperable due to an inoperable CRE boundary, the proposed changes to the STS as written allow movement of irradiated fuel and OPDRVs to continue for up to 24 hours prior to completion of Required Action B.2. This appears to conflict with the justification given in the second paragraph on page 5 of TSTF-508, in that the justification seems to imply that fuel movement would be suspended until Required Action B.2 is complete. The NRC staff also believes that it is prudent to immediately suspend fuel handling operations or OPDRVs until after Required Action B.2 is complete. The characteristic risk of a Fuel Handling Accident (FHA), and the dynamic nature of plant maintenance, repair, testing, and other ongoing operations that could be taking place during Modes 5 and 6 is of primary concern.
In TSTF-448, Rev. 3, Required Action B.2 is applicable to MODES 1 through [4] (hot shutdown). "The 24-hour Completion Time of new Required Action B.2 is reasonable based on the low probability of a DBA occurring during this time period, and the use of mitigating Page 1

Response to April 17, 2009 Request for Additional Information Regarding TSTF-508, Revision 0, "Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation" actions as directed by Required Action B.1." Generally, the plant would be expected to remain in a steady state condition during the 24-hour verification time. However, there is the possibility of a fuel handling accident each time a fuel assembly is moved. TSTF-508 would permit continued movement of fuel, and therefore, continued risk of a fuel handling accident, for up to 24-hours before completing the verification that mitigating actions protect CRE occupants from chemical and smoke hazards and that radiological limits will not be exceeded. The NRC staff believes TSTF-508 did not provide sufficient justification based on safety for continued movement of irradiated fuel assemblies or performing OPDRVS before completion of Required Action B.2.
: 1. Explain how the proposed change in TSTF-508 will ensure CRE occupant radiological exposures will not exceed limits, and CRE occupants will be protected from chemical and smoke hazards during the period of time between the discovery of one or more [CREVS/CREFS/CREACS/MCREC/CRFA] subsystems inoperable due to an inoperable CRE and the completion of Required Action B.2 while moving irradiated fuel or performing OPDRVs.

===Response===
The Technical Specifications Task Force (TSTF), which is a jointly sponsored activity of the Pressurized Water Reactor Owners Group (PWROG) and the Boiling Water Reactor's Owners Group (BWROG), submitted TSTF-508 for NRC review. TSTF-508 is applicable to all reactor types.
The justification provided for TSTF-508 is based on the assumption that the probability of a fuel handling accident while the CRE boundary is inoperable is less than the probability of a design basis accident for the same period while in Mode 1. Therefore, allowing continued fuel movement during the 24 hour period until completion of the verification that the mitigating actions will protect the CRE occupants presents a smaller risk than utilizing the same allowance while in Mode 1. We believe this to be reasonable, but providing an analytical justification for this assumption would be cost prohibitive. Therefore, the TSTF agrees to modify TSTF-508 to require immediate suspension of the movement of [recently]
irradiated fuel assemblies, and for BWR plants immediate initiation of action to suspend OPDRVs, until completion of verification that mitigating actions protect CRE occupants from chemical and smoke hazards and that radiological limits will not be exceeded.
A revision to TSTF-508 is attached to this response.
Page 2

Response to April 17, 2009 Request for Additional Information Regarding TSTF-508, Revision 0, "Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation" On page 6 of TSTF-508, the response to the question "Does the proposed change involve a significant increase in the probability or consequences of an accident previously evaluated?"
is No.
Since the STS, as amended by TSTF-448, do not allow movement of irradiated fuel while a plants CRE boundary is inoperable, the probability of a FHA when moving irradiated fuel while a plants CRE boundary is inoperable is essentially zero. As stated above, TSTF-508 would allow irradiated fuel movement and OPDRVs to occur while a plants CRE boundary is inoperable. This causes the probability of a FHA when moving irradiated fuel while a plants CRE boundary is inoperable to be greater than zero.
Similarly, STS as amended by TSTF-448 cause the consequences of a FHA while a plants CRE boundary is inoperable to be essentially zero. Using the STS proposed by TSTF-508 could cause the consequences of a FHA while a plants CRE boundary is inoperable to be significantly greater than the consequences of a FHA when using the STS as amended by TSTF-448.
Therefore, the staff does not agree with the justification or the response to the question "Does the proposed change involve a significant increase in the probability or consequences of an accident previously evaluated?" proposed in TSTF-508.
: 2. Explain or provide further justification for the response to the question "Does the proposed change involve a significant increase in the probability or consequences of an accident previously evaluated?"

===Response===
The CRE boundary is not an initiator to a fuel handling accident as previously analyzed in licensing basis calculations. Therefore, the probability of a fuel handling accident is not related to the Operability of the CRE boundary. However, the TSTF agrees that it is possible that the proposed Required Actions in TSTF-508 could result in significantly increased consequences to CRE occupants should a fuel handling accident occur during the period that the CRE boundary is inoperable.
As stated in the response to Question 1, the TSTF agrees to modify TSTF-508 to require immediate suspension of the movement of [recently] irradiated fuel assemblies, and for BWR plants immediate initiation of action to suspend OPDRVs, until completion of the verification that mitigating actions will protect the CRE occupants from chemical and smoke hazards and that radiological limits will not be exceeded.
The No Significant Hazards Consideration determination provided in TSTF-508 is modified to reflect the change to the Required Actions.
Page 3

WOG-192, Rev. 0                   TSTF-508, Rev. 1 Technical Specification Task Force Improved Standard Technical Specifications Change Traveler Revise Control Room Habitability Actions to Address Lessons Learned from TSTF-448 Implementation NUREGs Affected:               1430           1431             1432            1433         1434 Classification 1) Technical Change                                                  Recommended for CLIIP?: Yes Correction or Improvement:            Improvement                                            NRC Fee Status:        Not Exempt Benefit:       Provides Longer Completion Time Industry

==Contact:==
Ken Schrader, (805) 545-4328, kjse@pge.com See attached.
Revision History OG Revision 0                                  Revision Status: Closed Revision Proposed by: PWROG LSC Revision

== Description:==

Original Issue Owners Group Review Information Date Originated by OG: 26-Mar-08 Owners Group Comments (No Comments)
Owners Group Resolution:            Approved          Date: 05-May-08 TSTF Review Information TSTF Received Date:          30-May-08                  Date Distributed for Review 30-May-08 OG Review Completed:               BWOG            WOG            CEOG          BWROG TSTF Comments:
(No Comments)
TSTF Resolution:         Approved                                            Date: 03-Jul-08 NRC Review Information NRC Received Date:            03-Jul-08 NRC Comments:
The NRC provided an RAI on April 17. TSTF-508 is revised to incorporate the requested changes.
Final Resolution:        Superceded by Revision TSTF Revision 1                                Revision Status: Active 18-Jun-09 Traveler Rev. 3. Copyright (C) 2006, EXCEL Services Corporation. Use by EXCEL Services associates, utility clients, and the U.S. Nuclear Regulatory Commission is granted. All other use without written permission is prohibited.

WOG-192, Rev. 0                   TSTF-508, Rev. 1 TSTF Revision 1                                Revision Status: Active Revision Proposed by: NRC Revision

== Description:==

The NRC provided an RAI on TSTF-508 on April 17, 2009. The response to the RAIs resulted in the following changes to TSTF-508.
: 1) Condition B is revised to immediately require suspension of movement of [recently] irradiated fuel and, for BWR plants the immediate initiation of action to stop operations with the potential to drain the reactor vessel (OPDRVs), until completion of the required verification that mitigating actions ensure control room envelope (CRE) occupant radiological exposures will not exceed limits, and CRE occupants are protected from chemical and smoke hazards. This will eliminate the potential of an accident until it can be confirmed that the CRE occuptants will be protected.
: 2) The Condition B Bases are revised to reflect the changes to the specification.
: 3) The justification and No Significant Hazards Consideration Determination are revised to reflect the changes to Condition B.
Owners Group Review Information Date Originated by OG: 31-May-09 Owners Group Comments (No Comments)
Owners Group Resolution:            Approved          Date: 18-Jun-09 TSTF Review Information TSTF Received Date:          31-May-09                  Date Distributed for Review 31-May-09 OG Review Completed:               BWOG            WOG            CEOG          BWROG TSTF Comments:
(No Comments)
TSTF Resolution:         Approved                                            Date: 18-Jun-09 NRC Review Information NRC Received Date:            18-Jun-09 Affected Technical Specifications 5.5.18                     Control Room Envelope Habitability Program                           NUREG(s)- 1430 1431 1432 Only Action 3.7.10.B             CREVS                                                                NUREG(s)- 1430 Only Action 3.7.10.B Bases       CREVS                                                                NUREG(s)- 1430 Only 18-Jun-09 Traveler Rev. 3. Copyright (C) 2006, EXCEL Services Corporation. Use by EXCEL Services associates, utility clients, and the U.S. Nuclear Regulatory Commission is granted. All other use without written permission is prohibited.

WOG-192, Rev. 0                    TSTF-508, Rev. 1 Action 3.7.10.E             CREVS                                                               NUREG(s)- 1430 Only Action 3.7.10.E Bases       CREVS                                                               NUREG(s)- 1430 Only Action 3.7.10.B             CREFS                                                               NUREG(s)- 1431 Only Action 3.7.10.B Bases       CREFS                                                               NUREG(s)- 1431 Only Action 3.7.10.E             CREFS                                                               NUREG(s)- 1431 Only Action 3.7.10.E Bases       CREFS                                                               NUREG(s)- 1431 Only Action 3.7.11.B             CREACS                                                              NUREG(s)- 1432 Only Action 3.7.11.B Bases       CREACS                                                              NUREG(s)- 1432 Only Action 3.7.11.E             CREACS                                                              NUREG(s)- 1432 Only Action 3.7.11.E Bases       CREACS                                                              NUREG(s)- 1432 Only 5.5.15                     Control Room Envelope Habitability Program                          NUREG(s)- 1433 1434 Only Action 3.7.4.B              [MCREC] System                                                      NUREG(s)- 1433 Only Action 3.7.4.B Bases        [MCREC] System                                                      NUREG(s)- 1433 Only Action 3.7.4.F              [MCREC] System                                                      NUREG(s)- 1433 Only Action 3.7.4.F Bases        [MCREC] System                                                      NUREG(s)- 1433 Only Action 3.7.3.B              [CRFA] System                                                       NUREG(s)- 1434 Only Action 3.7.3.B Bases        [CRFA] System                                                       NUREG(s)- 1434 Only Action 3.7.3.F              [CRFA] System                                                       NUREG(s)- 1434 Only Action 3.7.3.F Bases        [CRFA] System                                                       NUREG(s)- 1434 Only 18-Jun-09 Traveler Rev. 3. Copyright (C) 2006, EXCEL Services Corporation. Use by EXCEL Services associates, utility clients, and the U.S. Nuclear Regulatory Commission is granted. All other use without written permission is prohibited.

TSTF-508, Rev. 1 1.0 Description TSTF-448, Revision 3, "Control Room Habitability," was approved by the NRC on January 17, 2007. Since its publication, over 20 sites have adopted the Traveler. Several inconsistencies and improvements to TSTF-448 have been identified. The purpose of this Traveler is to address these inconsistencies and to pursue improvements consistent with the justification in TSTF-448.
: a. TSTF-448 modified the Required Actions of the control room ventilation Specifications when the control room envelope (CRE) boundary is inoperable to require initiation of mitigating actions, verification that the mitigating actions ensure that CRE occupants are protected, and restoration of the control room boundary to Operable status within 90 days. This action applies when the plant is in the operating Modes (Modes 1-4 for pressurized water reactors (PWRs), Modes 1-3 for Boiling Water Reactors (BWRs)).
The Actions for an inoperable boundary in other Modes and specified Conditions in the Applicability (Modes 5 and 6 for PWRs and during movement of [recently]
irradiated fuel assemblies in the [secondary] containment and during operations with a potential for draining the reactor vessel (OPDRVs) for BWRs) require immediate suspension of movement of [recently] irradiated fuel assemblies and, for BWRs, suspension of OPDRVs. This Action is more restrictive than the similar Actions for the operating Modes.
The proposed change revises the Actions of the control room ventilation specification to apply the same actions in all Modes and other specified conditions after it has been verified that the CRE occupants are protected. If these Actions are not completed in the included Modes or other specified conditions, the existing Action is applicable.
: b. Required Action B.2 states, "Verify mitigating actions ensure CRE occupant exposures to radiological, chemical, and smoke hazards will not exceed limits." This wording is incorrect in that it refers to limits for chemical and smoke hazards but these hazards do not have quantifiable limits. The Required Action is revised to state, "Verify mitigating actions ensure CRE occupant radiological exposures will not exceed limits, and CRE occupants are protected from chemical and smoke hazards."
: c. The Control Room Envelope Habitability Program, paragraph d, requires pressure testing at a Frequency of [18] months on a STAGGERED TEST BASIS. The last sentence of the paragraph states, "The results shall be trended and used as part of the
[18] month assessment of the CRE boundary." This statement is incorrect as the assessment being referenced is required by Regulatory Guide 1.197 to be performed every 36 months, not every 18 months. This error was identified shortly before the final approval of TSTF-448 and acknowledged by the NRC and the industry. The sentence is revised to state, "The results shall be trended and used as part of the periodic assessment of the CRE boundary."
2

TSTF-508, Rev. 1 2.0 Proposed Change The Technical Specification and Bases markups for this Traveler are shown on pages modified to incorporate the NRC-approved changes in TSTF-448-A, Revision 3, "Control Room Habitability."
: a. Conditions B and E of the following Specifications are revised:
* NUREG-1430, Specification 3.7.10, "Control Room Emergency Ventilation System (CREVS),"
* NUREG-1431, Specification 3.7.10, "Control Room Emergency Filtration System (CREFS),"
* NUREG-1431, Specification 3.7.11, "Control Room Emergency Air Cleanup System (CREACS),"
* NUREG-1433, Specification 3.7.4, "[Main Control Room Environmental Control (MCREC)] System, and
* NUREG-1434, Specification 3.7.3, "[Control Room Fresh Air (CRFA)] System."
Condition B is revised to delete the Mode restriction. For example, NUREG-1430 is revised from "One or more CREVS trains inoperable due to inoperable CRE boundary in MODE 1, 2, 3, or 4" to delete the phrase "in MODE 1, 2, 3, or 4." This change applies Condition B in all Modes and other specified conditions in the Applicability.
Condition B is revised to add a new Required Action, which requires immediate suspension of movement of [recently] irradiated fuel assemblies. BWR Condition B is revised to include an addition Required Action to immediately suspend operations with the potential to drain the reactor vessel (OPDRVs). These new Required Actions are modified by Notes that state that the Required Action is not required following completion of the verification that the CRE occupants are protected.
PWR Condition E contains two conditions joined with an OR logical connector. The first states, "Two [CREVS/CREFS/CREACS] trains inoperable [in MODE 5 or 6, or]
during movement of [recently] irradiated fuel assemblies." This is changed to add "for conditions other than Condition B." The second Condition states, "One or more CREACS trains inoperable due to an inoperable CRE boundary [in MODE 5 or 6, or]
during movement of [recently] irradiated fuel assemblies." This condition is revised to state, "Required Actions and associated Completion Times of Condition B not met
[in MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies."
This becomes the default action for Condition B.
BWR Condition F is similar to PWR Condition E. Condition F contains two conditions joined with an OR logical connector. The first states, "Two 3

TSTF-508, Rev. 1
[MCREC/CRFA] subsystems inoperable during movement of [recently] irradiated fuel assemblies in the [secondary/primary or secondary containment] or during OPDRVs." This is changed to add "for conditions other than Condition B." The second Condition states, "One or more [MCREC/CRFA] subsystems inoperable due to an inoperable CRE boundary during movement of [recently] irradiated fuel assemblies in the [secondary/primary or secondary] containment or during OPDRVs."
This condition is revised to state, "Required Actions and associated Completion Times of Condition B not met during movement of [recently] irradiated fuel assemblies in the [secondary/primary or secondary] containment or during OPDRVs."
This becomes the default action for Condition B.
No changes to the Bases of Condition B are required. The Condition E Bases are revised to be consistent with the revised condition.
: b. Required Action B.2 is revised from, "Verify mitigating actions ensure CRE occupant exposures to radiological, chemical, and smoke hazards will not exceed limits," to "Verify mitigating actions ensure CRE occupant radiological exposures will not exceed limits, and CRE occupants are protected from chemical and smoke hazards."
: c. PWR Specification 5.5.18 and BWR Specification 5.5.15, "Control Room Envelope Habitability Program," paragraph d, last sentence is changed from, "The results shall be trended and used as part of the [18] month assessment of the CRE boundary," to "The results shall be trended and used as part of the periodic assessment of the CRE boundary."

===3.0 Background===
TSTF-448, Revision 3, "Control Room Habitability," was approved by the NRC on January 17, 2007. Since its publication, over 20 sites have adopted the Traveler. Several inconsistencies and improvements to TSTF-448 have been identified. The purpose of this Traveler is to address these inconsistencies and to pursue improvements consistent with the justification in TSTF-448.
Under TSTF-448-A, Revision 3, licensees are required to perform periodic CRE inleakage testing and periodically evaluate the condition of the CRE boundary. Should the CRE boundary inleakage exceed that assumed in the accident analysis, the Actions require implementing mitigating actions, verification that the mitigating actions will protect the CRE occupants from radiological, chemical, and smoke hazards, and restoration of the CRE boundary to Operable status within 90 days. The 90 day Completion Time was considered reasonable based on the determination that the mitigating actions will ensure protection of CRE occupants within analyzed limits while limiting the probability that CRE occupants will have to implement protective measures that may adversely affect their ability to control the reactor and maintain it in a safe shutdown condition in the event of a DBA. In addition, the 90 day Completion Time is a reasonable time to diagnose, plan and possibly repair, and test most problems with the CRE boundary. In the shutdown Modes, the control room ventilation Required Actions require immediately suspending movement of [recently] irradiated fuel assemblies. This 4

TSTF-508, Rev. 1 action is overly restrictive once mitigating actions are taken that will assure protection of the CRE occupants should an event occur.
In addition, the need for corrections to Required Action B.2 and the Control Room Envelope Habitability Program paragraph d, has been identified.
4.0 Technical Analysis
: a. The CRE provides a protected environment from which occupants can control the unit following an uncontrolled release of radioactivity, hazardous chemicals, or smoke. In the operating Modes, the threats to the CRE occupants are the same or significantly larger than in the shutdown Modes. For example, the threat of fire or toxic chemicals is unchanged but the source term for radiological threats is significantly greater than in the shutdown Modes when the most significant radiological threat is a fuel handling accident.
The current action, which requires the immediate suspension of movement of
[recently] irradiated fuel assemblies when the CRE boundary is inoperable, is an overly restrictive and unnecessary action. First, suspension of fuel movement is unnecessary once Required Action B.2 verifies that the required mitigating actions protect the CRE occupants. Second, the proposed change is more restrictive in that the existing action to suspend [recently] irradiated fuel assemblies does nothing to mitigate the effects of a chemical or smoke hazard. Third, suspension of fuel movement until the CRE boundary is restored to Operable status can disrupt a carefully planned refueling schedule and increases the risk of a human performance error. If the Required Actions of Condition B cannot be met (i.e., if cannot be verified that the mitigating actions ensure CRE occupants are protected from radiological, chemical, and smoke hazards) the existing action to suspend movement of [recently] irradiated fuel assemblies applies. This parallels the Actions for the operating Modes. Therefore, there is an improvement in the protection provided by the Required Actions while providing additional flexibility and reducing the possibility of human performance errors.
: b. During development of Revision 3 to TSTF-448, it was agreed that smoke requirements were qualitative rather than quantitative, and the concept of smoke limits was therefore deleted from the Section 5.5 Habitability Program, item e. In the NRC meeting minutes that agreed to this change to Section 5.5 (see ADAMS accession number ML061310293, page 2 of minutes dated May 12, 2006), it was noted that this was acceptable, because general qualitative requirements for protecting CRE occupants from smoke challenges are retained in the first paragraph of the proposed Administrative Controls Control Room Envelope Habitability Program, along with a licensing basis discussion in the "Applicable Safety Analyses" section of the Bases. Together these adequately address the licensing basis requirements for protecting CRE occupants from smoke. To be consistent with this concept, Required Action B.2 is revised to refer to limits for radiological hazards, but does not include a reference to limits for smoke. The proposed wording in Required Action B.2 with 5

TSTF-508, Rev. 1 respect to smoke is consistent with the words used in Evaluation No. 2 of the NRC model safety evaluation; and with the words in the Bases for Required Action B.2.
The explicit reference to limits on chemical hazards has also been removed from Required Action B.2. The proposed wording of Required Action B.2 with respect to chemicals is consistent with the words used in the NRC model safety evaluation, Evaluation No. 2, and with the words in the Bases for Required Action B.2.
This change has been approved by the NRC for several plants, including Beaver Valley (see ADAMS #ML080370178) and Perry (see ADAMS #ML080310794).
: c. In order to be consistent with paragraph c of the Control Room Envelope Habitability Program, the last sentence of paragraph d is revised to use the term "periodic" in lieu of the bracketed phrase "18 month." The model TS indicates that periodic CRE relative pressure measurements shall "be trended and used as part of the [18 month]
assessment of the CRE boundary." However, the only periodic assessment required by the TSTF-448 model TS occurs at intervals specified in Regulatory Guide 1.197, "Demonstrating Control Room Envelope Integrity at Nuclear Power Reactors,"
Section C.l, as specified by paragraph c. This assessment is normally performed every 36 months, but the 36 month frequency appears only in the Regulatory Guide and does not appear in the TS. In discussions between the NRC and the TSTF, it was determined that the inclusion of the phrase "18 months" in this sentence was an error.
Therefore, to be consistent with the remainder of the program, the bracketed phrase
    "[18 months]" is replaced with the word "periodic." This substitution resolves the inconsistency between these two requirements in a manner consistent with the published regulatory guidance.
5.0 Regulatory Analysis 5.1 No Significant Hazards Consideration The TSTF has evaluated whether or not a significant hazards consideration is involved with the proposed generic change by focusing on the three standards set forth in 10 CFR 50.92, "Issuance of amendment," as discussed below:
: 1. Does the proposed change involve a significant increase in the probability or consequences of an accident previously evaluated?
Response: No.
The proposed changes do not adversely affect accident initiators or precursors nor alter the design assumptions, conditions, or configuration of the facility. The proposed changes do not alter or prevent the ability of structures, systems, and components (SSCs) to perform their intended function to mitigate the consequences of an initiating event within the assumed acceptance limits. This is a revision to the Technical Specifications for the control room ventilation system which is a mitigation system designed to minimize unfiltered air inleakage into the control room envelope (CRE) and to filter the CRE atmosphere to protect the 6

TSTF-508, Rev. 1 CRE occupants following accidents previously analyzed. An important part of the system is the CRE boundary. Under the proposed change, the movement of irradiated fuel and operations with the potential to drain the reactor vessel may be resumed following confirmation that the CRE occupants will be protected in the event of a DBA. This ensures that the consequences of an accident previously evaluation are not significantly increased. The CRE ventilation system is not an initiator or precursor to any accident previously evaluated. Therefore, the probability of any accident previously evaluated is not increased. The consequences of an accident during the proposed Actions are not significantly increased as the Actions require verification that the CRE occupants are protected by the required mitigating actions.
Therefore, it is concluded that this change does not involve a significant increase in the probability or consequences of an accident previously evaluated.
: 2. Does the proposed change create the possibility of a new or different kind of accident from any accident previously evaluated?
Response: No.
This revision will not impact the accident analysis. The changes will not alter the requirements of the CRE ventilation system or its function during accident conditions. No new or different accidents result from performing the new surveillance or following the new program. The changes do not involve a physical alteration of the plant (i.e., no new or different type of equipment will be installed) or a significant change in the methods governing normal plant operation. The changes do not alter assumptions made in the safety analysis. The proposed changes are consistent with the safety analysis assumptions and current plant operating practice.
Therefore, it is concluded that this change does not create the possibility of a new or different kind of accident from any accident previously evaluated.
: 3. Does the proposed change involve a significant reduction in a margin of safety?
Response: No.
The proposed changes do not alter the manner in which safety limits, limiting safety system settings or limiting conditions for operation are determined. The safety analysis acceptance criteria are not affected by these changes. The proposed changes will not result in plant operation in a configuration outside the design basis. Compensatory measures are required to be established in order to maintain plant operation in a configuration that is within the design basis. The proposed changes do not adversely affect systems that respond to safely shutdown the plant and to maintain the plant in a safe shutdown condition.
Therefore, it is concluded that this change does not involve a significant reduction in a margin of safety.
7

TSTF-508, Rev. 1 Based on the above, the TSTF concludes that the proposed change presents no significant hazards considerations under the standards set forth in 10 CFR 50.92(c), and, accordingly, a finding of "no significant hazards consideration" is justified.
5.2 Applicable Regulatory Requirements/Criteria The proposed change to the Improved Standard Technical Specifications will ensure that compliance with requirements equivalent to 10 CFR 50, Appendix A, GDC 19 is maintained. Based on the considerations discussed above, (1) there is reasonable assurance that the health and safety of the public will not be endangered by operation in the proposed manner, (2) such activities will be conducted in compliance with the Commissions regulations, and (3) the approval of the proposed change will not be inimical to the common defense and security or to the health and safety of the public.
6.0 Environmental Consideration A review has determined that the proposed change would change a requirement with respect to installation or use of a facility component located within the restricted area, as defined in 10 CFR 20, or would change an inspection or surveillance requirement.
However, the proposed change does not involve (i) a significant hazards consideration, (ii) a significant change in the types or significant increase in the amounts of any effluent that may be released offsite, or (iii) a significant increase in individual or cumulative occupational radiation exposure. Accordingly, the proposed change meets the eligibility criterion for categorical exclusion set forth in 10 CFR 51.22(c)(9). Therefore, pursuant to 10 CFR 51.22(b), no environmental impact statement or environmental assessment need be prepared in connection with the proposed change.
7.0 References
: 1. Notice of Availability for TSTF-448, Revision 3, "Control Room Habitability,"
Federal Register / Vol. 72, No. 10 / Wednesday, January 17, 2007, page 2022.
8

TSTF-508, Rev. 1 CREVS 3.7.10 3.7 PLANT SYSTEMS 3.7.10      Control Room Emergency Ventilation System (CREVS)
LCO 3.7.10            Two CREVS trains shall be OPERABLE.
                      ---------------------------------------------NOTE--------------------------------------------
The control room envelope (CRE) boundary may be opened intermittently under administrative control.
APPLICABILITY:        MODES 1, 2, 3, 4, [5, and 6],
[During movement of [recently] irradiated fuel assemblies].
ACTIONS CONDITION                            REQUIRED ACTION                            COMPLETION TIME A. One CREVS train                  A.1        Restore CREVS train to                   7 days inoperable for reasons                     OPERABLE status.
other than Condition B.
B. One or more CREVS                B.1        Initiate action to implement             Immediately trains inoperable due to                   mitigating actions.
inoperable CRE boundary in MODE 1, 2,          AND 3, or 4.
B.2        --------------NOTE--------------
Not required following completion of Required Action B.3.
Suspend movement of                      Immediately
[recently] irradiated fuel assemblies.
AND B.32       Verify mitigating actions                24 hours ensure CRE occupant radiological exposures to radiological, chemical, and smoke hazards will not exceed limits, and CRE occupants are protected BWOG STS                                           3.7.10-1                                     Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREVS 3.7.10 CONDITION                REQUIRED ACTION         COMPLETION TIME from chemical and smoke hazards.
AND B.43 Restore CRE boundary to 90 days OPERABLE status.
C. Required Action and      C.1  Be in MODE 3.           6 hours associated Completion Time of Condition A or B AND not met in MODE 1, 2, 3, or 4.                    C.2  Be in MODE 5.           36 hours BWOG STS                             3.7.10-2                  Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREVS 3.7.10 ACTIONS (continued)
CONDITION                 REQUIRED ACTION                        COMPLETION TIME D. [ Required Action and      D.1 --------------NOTE---------------
associated Completion          Place in emergency mode if Time of Condition A not        automatic transfer to met [in MODE 5 or 6, or]       emergency mode is during movement of             inoperable.
[recently] irradiated fuel     -------------------------------------
assemblies.
Place OPERABLE CREVS                  Immediately train in emergency mode.
OR D.2 Suspend movement of                   Immediately ]
[recently] irradiated fuel assemblies.
E. [ Two CREVS trains         E.1 Suspend movement of                   Immediately ]
inoperable [in MODE 5          [recently] irradiated fuel or 6, or] during               assemblies.
movement of [recently]
irradiated fuel assemblies for reasons other than Condition B.
OR Required Actions and associated Completion Times of Condition B not met One or more CREVS trains inoperable due to an inoperable CRE boundary [in MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies.
F. Two CREVS trains           F.1 Enter LCO 3.0.3.                      Immediately inoperable in MODE 1, 2, 3, or 4 for reasons other than Condition B.
BWOG STS                              3.7.10-3                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 Programs and Manuals 5.5 5.5   Programs and Manuals 5.5.17       Battery Monitoring and Maintenance Program This Program provides for battery restoration and maintenance, based on [the recommendations of IEEE Standard 450-1995, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications," or of the battery manufacturer] including the following:
: a. Actions to restore battery cells with float voltage < [2.13] V, and
: b. Actions to equalize and test battery cells that had been discovered with electrolyte level below the minimum established design limit.
5.5.18       Control Room Envelope Habitability Program A Control Room Envelope (CRE) Habitability Program shall be established and implemented to ensure that CRE habitability is maintained such that, with an OPERABLE Control Room Emergency Ventilation System (CREVS), CRE occupants can control the reactor safely under normal conditions and maintain it in a safe condition following a radiological event, hazardous chemical release, or a smoke challenge. The program shall ensure that adequate radiation protection is provided to permit access and occupancy of the CRE under design basis accident (DBA) conditions without personnel receiving radiation exposures in excess of [5 rem whole body or its equivalent to any part of the body] [5 rem total effective dose equivalent (TEDE)] for the duration of the accident. The program shall include the following elements:
: a.       The definition of the CRE and the CRE boundary.
: b.       Requirements for maintaining the CRE boundary in its design condition including configuration control and preventive maintenance.
: c.       Requirements for (i) determining the unfiltered air inleakage past the CRE boundary into the CRE in accordance with the testing methods and at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, "Demonstrating Control Room Envelope Integrity at Nuclear Power Reactors," Revision 0, May 2003, and (ii) assessing CRE habitability at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0.
[The following are exceptions to Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0:
: 1. ;and]
: d.       Measurement, at designated locations, of the CRE pressure relative to all external areas adjacent to the CRE boundary during the pressurization mode of operation by one train of the CREVS, operating at the flow rate required by the VFTP, at a Frequency of [18] months on a STAGGERED BWOG STS                                      5.5-18                             Rev. 3.1, 12/01/05

TSTF-508, Rev. 1 Programs and Manuals 5.5 TEST BASIS. The results shall be trended and used as part of the periodic [18] month assessment of the CRE boundary.
: e. The quantitative limits on unfiltered air inleakage into the CRE. These limits shall be stated in a manner to allow direct comparison to the unfiltered air inleakage measured by the testing described in paragraph c.
The unfiltered air inleakage limit for radiological challenges is the inleakage flow rate assumed in the licensing basis analyses of DBA consequences. Unfiltered air inleakage limits for hazardous chemicals must ensure that exposure of CRE occupants to these hazards will be within the assumptions in the licensing basis.
: f. The provisions of SR 3.0.2 are applicable to the Frequencies for assessing CRE habitability, determining CRE unfiltered inleakage, and measuring CRE pressure and assessing the CRE boundary as required by paragraphs c and d, respectively.
BWOG STS                             5.5-19                            Rev. 3.1, 12/01/05

TSTF-508, Rev. 1 CREVS B 3.7.10 BASES ACTIONS  A.1 With one CREVS train inoperable, for reasons other than an inoperable CRE boundary, action must be taken to restore OPERABLE status within 7 days. In this Condition, the remaining OPERABLE CREVS train is adequate to perform the CRE occupant protection function. However, the overall reliability is reduced because a failure in the OPERABLE CREVS train could result in loss of CREVS 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, B.2, B.3, and B.34 If the unfiltered inleakage of potentially contaminated air past the CRE boundary and into the CRE can result in CRE occupant radiological dose greater than the calculated dose of the licensing basis analyses of DBA consequences (allowed to be up to [5 rem whole body or its equivalent to any part of the body] [5 rem TEDE]), or inadequate protection of CRE occupants from hazardous chemicals or smoke, the CRE boundary is inoperable. Actions must be taken to restore an OPERABLE CRE boundary within 90 days.
During the period that the CRE boundary is considered inoperable, action must be initiated to implement mitigating actions to lessen the effect on CRE occupants from the potential hazards of a radiological or chemical event or a challenge from smoke. If [recently] irradiated fuel assemblies are being moved, fuel movement must be immediately suspended to eliminate the possibility of a fuel handling accident. Actions must be taken within 24 hours to verify that in the event of a DBA, the mitigating actions will ensure that CRE occupant radiological exposures will not exceed the calculated dose of the licensing basis analyses of DBA consequences, and that CRE occupants are protected from hazardous chemicals and smoke. These mitigating actions (i.e., actions that are taken to offset the consequences of the inoperable CRE boundary) should be preplanned for implementation upon entry into the condition, regardless of whether entry is intentional or unintentional. The 24 hour Completion Time is reasonable based on the low probability of a DBA occurring during this time period, and the use of mitigating actions.
Following verification that the CRE occupants are protected, movement of
[recently] irradiated fuel assemblies may be resumed. The 90 day Completion Time is reasonable based on the determination that the mitigating actions will ensure protection of CRE occupants within analyzed limits while limiting the probability that CRE occupants will have to implement protective measures that may adversely affect their ability to control the reactor and maintain it in a safe shutdown condition in the event of a DBA. In addition, the 90 day Completion Time is a reasonable BWOG STS                      B 3.7.10-5                           Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREVS B 3.7.10 time to diagnose, plan and possibly repair, and test most problems with the CRE boundary.
BWOG STS                  B 3.7.10-6                             Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREVS B 3.7.10 C.1 and C.2 In MODE 1, 2, 3, or 4, if the inoperable CREVS train or the CRE boundary 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 hours, and in MODE 5 within 36 hours. 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.
BWOG STS                  B 3.7.10-7                              Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREVS B 3.7.10 BASES ACTIONS (continued)
[ D.1 and D.2
[ In MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies, if the inoperable CREVS train cannot be restored to OPERABLE status within the required Completion Time, the OPERABLE CREVS train must immediately be placed 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 will be readily detected.
An alternative to Required Action D.1 is to immediately suspend activities that could release radioactivity that might require isolation of the CRE.
This places the unit in a condition that minimizes the accident risk. This does not preclude the movement of fuel to a safe position.
Required Action D.1 is modified by a Note indicating to place the system in the emergency mode if automatic transfer to the emergency mode is inoperable. ]
[ E.1
[In MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies, when two CREVS trains are inoperable for reasons other than Condition B or with the Required Actions and associated Completion Times of Condition B not met, one or more CREVS trains inoperable due to an inoperable CRE boundary, action must be taken immediately to suspend activities that could result in a release of radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk. This does not preclude the movement of fuel to a safe position. ]
F.1 If both CREVS trains are inoperable in MODE 1, 2, 3, or 4 for reasons other than an inoperable CRE boundary (i.e., Condition B), the CREVS may not be capable of performing the intended function and the unit is in a condition outside the accident analysis. Therefore, LCO 3.0.3 must be entered immediately.
BWOG STS                             B 3.7.10-8                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREFS 3.7.10 3.7 PLANT SYSTEMS 3.7.10      Control Room Emergency Filtration System (CREFS)
LCO 3.7.10            Two CREFS trains shall be OPERABLE.
                      ---------------------------------------------NOTE--------------------------------------------
The control room envelope (CRE) boundary may be opened intermittently under administrative control.
APPLICABILITY:        MODES 1, 2, 3, 4, [5, and 6],
During movement of [recently] irradiated fuel assemblies.
ACTIONS CONDITION                            REQUIRED ACTION                            COMPLETION TIME A. One CREFS train                  A.1        Restore CREFS train to                   7 days inoperable for reasons                     OPERABLE status.
other than Condition B.
B. One or more CREFS                B.1        Initiate action to implement             Immediately trains inoperable due to                   mitigating actions.
inoperable CRE boundary in MODE 1, 2,          AND 3, or 4.
B.2        --------------NOTE--------------
Not required following completion of Required Action B.3.
Suspend movement of                      Immediately
[recently] irradiated fuel assemblies.
AND B.23       Verify mitigating actions                24 hours ensure CRE occupant radiological exposures to radiological, chemical, and smoke hazards will not exceed limits, and CRE WOG STS                                            3.7.10-1                                     Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREFS 3.7.10 CONDITION                REQUIRED ACTION         COMPLETION TIME occupants are protected from chemical and smoke hazards.
AND B.34 Restore CRE boundary to 90 days OPERABLE status.
C. Required Action and      C.1  Be in MODE 3.           6 hours associated Completion Time of Condition A or B AND not met in MODE 1, 2, 3, or 4.                    C.2  Be in MODE 5.           36 hours WOG STS                              3.7.10-2                  Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREFS 3.7.10 ACTIONS (continued)
CONDITION                 REQUIRED ACTION                        COMPLETION TIME D. Required Action and        D.1 --------------NOTE--------------
associated Completion          [ Place in toxic gas Time of Condition A not        protection mode if met [in MODE 5 or 6, or]       automatic transfer to toxic during movement of             gas protection mode is
[recently] irradiated fuel     inoperable. ]
assemblies.                    -------------------------------------
Place OPERABLE CREFS                  Immediately train in emergency mode.
OR D.2 Suspend movement of                   Immediately
[recently] irradiated fuel assemblies.
E. Two CREFS trains           E.1 Suspend movement of                   Immediately inoperable [in MODE 5          [recently] irradiated fuel or 6, or] during               assemblies.
movement of [recently]
irradiated fuel assemblies for reasons other than Condition B.
OR Required Actions and associated Completion Times of Condition B not met One or more CREFS trains inoperable due to an inoperable CRE boundary [in MODE 5 or 6, or] during movement of [recently]
irradiated fuel assemblies.
F. Two CREFS trains           F.1 Enter LCO 3.0.3.                      Immediately inoperable in MODE 1, 2, 3, or 4 for reasons other than Condition B.
WOG STS                               3.7.10-3                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.16  Containment Leakage Rate Testing Program (continued)
: 1. Containment leakage rate acceptance criterion is  1.0 La. During the first unit startup following testing in accordance with this program, the leakage rate acceptance criteria are < 0.60 La for the Type B and C tests and [< 0.75 La for Option A Type A tests] [ 0.75 La for Option B Type A tests].
: 2. Air lock testing acceptance criteria are:
a)     Overall air lock leakage rate is  [0.05 La] when tested at  Pa.
b)     For each door, leakage rate is  [0.01 La] when pressurized to
[ 10 psig].
: e. The provisions of SR 3.0.3 are applicable to the Containment Leakage Rate Testing Program.
: f. Nothing in these Technical Specifications shall be construed to modify the testing Frequencies required by 10 CFR 50, Appendix J.
5.5.17      Battery Monitoring and Maintenance Program This Program provides for battery restoration and maintenance, based on [the recommendations of IEEE Standard 450-1995, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications," or of the battery manufacturer] including the following:
: a. Actions to restore battery cells with float voltage < [2.13] V, and
: b. Actions to equalize and test battery cells that had been discovered with electrolyte level below the minimum established design limit.
5.5.18      Control Room Envelope Habitability Program A Control Room Envelope (CRE) Habitability Program shall be established and implemented to ensure that CRE habitability is maintained such that, with an OPERABLE Control Room Emergency Filtration System (CREFS), CRE occupants can control the reactor safely under normal conditions and maintain it in a safe condition following a radiological event, hazardous chemical release, or a smoke challenge. The program shall ensure that adequate radiation protection is provided to permit access and occupancy of the CRE under design basis accident (DBA) conditions without personnel receiving radiation exposures in excess of [5 rem whole body or its equivalent to any part of the body] [5 rem total effective dose equivalent (TEDE)] for the duration of the accident. The program shall include the following elements:
: a.       The definition of the CRE and the CRE boundary.
WOG STS                                         5.5-18                           Rev. 3.1, 12/01/05

TSTF-508, Rev. 1 Programs and Manuals 5.5
: b. Requirements for maintaining the CRE boundary in its design condition including configuration control and preventive maintenance.
: c. Requirements for (i) determining the unfiltered air inleakage past the CRE boundary into the CRE in accordance with the testing methods and at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, "Demonstrating Control Room Envelope Integrity at Nuclear Power Reactors," Revision 0, May 2003, and (ii) assessing CRE habitability at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0.
[The following are exceptions to Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0:
: 1. ;and]
: d. Measurement, at designated locations, of the CRE pressure relative to all external areas adjacent to the CRE boundary during the pressurization mode of operation by one train of the CREFS, operating at the flow rate required by the VFTP, at a Frequency of [18] months on a STAGGERED TEST BASIS. The results shall be trended and used as part of the periodic [18] month assessment of the CRE boundary.
: e. The quantitative limits on unfiltered air inleakage into the CRE. These limits shall be stated in a manner to allow direct comparison to the unfiltered air inleakage measured by the testing described in paragraph c.
The unfiltered air inleakage limit for radiological challenges is the inleakage flow rate assumed in the licensing basis analyses of DBA consequences. Unfiltered air inleakage limits for hazardous chemicals must ensure that exposure of CRE occupants to these hazards will be within the assumptions in the licensing basis.
: f. The provisions of SR 3.0.2 are applicable to the Frequencies for assessing CRE habitability, determining CRE unfiltered inleakage, and measuring CRE pressure and assessing the CRE boundary as required by paragraphs c and d, respectively.
WOG STS                             5.5-19                            Rev. 3.1, 12/01/05

TSTF-508, Rev. 1 CREFS B 3.7.10 BASES ACTIONS (continued)
B.1, B.2, B.3, and B.43 If the unfiltered inleakage of potentially contaminated air past the CRE boundary and into the CRE can result in CRE occupant radiological dose greater than the calculated dose of the licensing basis analyses of DBA consequences (allowed to be up to [5 rem whole body or its equivalent to any part of the body] [5 rem TEDE]), or inadequate protection of CRE occupants from hazardous chemicals or smoke, the CRE boundary is inoperable. Actions must be taken to restore an OPERABLE CRE boundary within 90 days.
During the period that the CRE boundary is considered inoperable, action must be initiated to implement mitigating actions to lessen the effect on CRE occupants from the potential hazards of a radiological or chemical event or a challenge from smoke. If [recently] irradiated fuel assemblies are being moved, fuel movement must be immediately suspended to eliminate the possibility of a fuel handling accident. Actions must be taken within 24 hours to verify that in the event of a DBA, the mitigating actions will ensure that CRE occupant radiological exposures will not exceed the calculated dose of the licensing basis analyses of DBA consequences, and that CRE occupants are protected from hazardous chemicals and smoke. These mitigating actions (i.e., actions that are taken to offset the consequences of the inoperable CRE boundary) should be preplanned for implementation upon entry into the condition, regardless of whether entry is intentional or unintentional. The 24 hour Completion Time is reasonable based on the low probability of a DBA occurring during this time period, and the use of mitigating actions.
Following verification that the CRE occupants are protected, movement of
[recently] irradiated fuel assemblies may be resumed. The 90 day Completion Time is reasonable based on the determination that the mitigating actions will ensure protection of CRE occupants within analyzed limits while limiting the probability that CRE occupants will have to implement protective measures that may adversely affect their ability to control the reactor and maintain it in a safe shutdown condition in the event of a DBA. In addition, the 90 day Completion Time is a reasonable time to diagnose, plan and possibly repair, and test most problems with the CRE boundary.
WOG STS                                  B 3.7.10-5                         Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREFS B 3.7.10 BASES ACTIONS (continued)
C.1 and C.2 In MODE 1, 2, 3, or 4, if the inoperable CREFS train or the CRE boundary 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 hours, and in MODE 5 within 36 hours. 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.
D.1 and D.2
[In MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies, if the inoperable CREFS train cannot be restored to OPERABLE status within the required Completion Time, action must be taken to immediately place the OPERABLE CREFS 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 D.1 is to immediately suspend activities that could result in a release of radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk. This does not preclude the movement of fuel to a safe position.
[ Required Action D.1 is modified by a Note indicating to place the system in the toxic gas protection mode if automatic transfer to the toxic gas protection mode is inoperable. ]
WOG STS                                  B 3.7.10-6                           Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREFS B 3.7.10 BASES ACTIONS (continued)
E.1
[In MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies, with two CREFS trains inoperable for reaons other than Condition B or with the Required Actions and associated Completion Times of Condition B not met, one or more CREVS trains inoperable due to an inoperable CRE boundary, action must be taken immediately to suspend activities that could result in a release of radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk. This does not preclude the movement of fuel to a safe position.
F.1 If both CREFS trains are inoperable in MODE 1, 2, 3, or 4 for reasons other than an inoperable CRE boundary (i.e., Condition B), the CREFS 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.
SURVEILLANCE      SR 3.7.10.1 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 for 10 continuous hours with the heaters energized. Systems without heaters need only be operated for 15 minutes to demonstrate the function of the system.] The 31 day Frequency is based on the reliability of the equipment and the two train redundancy.
SR 3.7.10.2 This SR verifies that the required CREFS testing is performed in accordance with the [Ventilation Filter Testing Program (VFTP)]. 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 additional information are discussed in detail in the [VFTP].
WOG STS                                  B 3.7.10-7                         Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREACS 3.7.11 3.7 PLANT SYSTEMS 3.7.11      Control Room Emergency Air Cleanup System (CREACS)
LCO 3.7.11            Two CREACS trains shall be OPERABLE.
                      ---------------------------------------------NOTE--------------------------------------------
The control room envelope (CRE) boundary may be opened intermittently under administrative control.
APPLICABILITY:        MODES 1, 2, 3, 4, [5, and 6,]
During movement of [recently] irradiated fuel assemblies.
ACTIONS CONDITION                            REQUIRED ACTION                            COMPLETION TIME A. One CREACS train                 A.1        Restore CREACS train to                  7 days inoperable for reasons                     OPERABLE status.
other than Condition B.
B. One or more CREACS               B.1        Initiate action to implement             Immediately trains inoperable due to                   mitigating actions.
inoperable CRE boundary in MODE 1, 2,          AND 3, or 4.
B.2        --------------NOTE--------------
Not required following completion of Required Action B.3.
Suspend movement of                      Immediately
[recently] irradiated fuel assemblies.
AND B.32       Verify mitigating actions                24 hours ensure CRE occupant radiological exposures to radiological, chemical, and smoke hazards will not exceed limits, and CRE CEOG STS                                           3.7.11-1                                     Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREACS 3.7.11 CONDITION                REQUIRED ACTION         COMPLETION TIME occupants are protected from chemical and smoke hazards.
AND B.43 Restore CRE boundary to 90 days OPERABLE status.
C. Required Action and      C.1  Be in MODE 3.           6 hours associated Completion Time of Condition A or B AND not met in MODE 1, 2, 3, or 4.                    C.2  Be in MODE 5.           36 hours CEOG STS                             3.7.11-2                  Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREACS 3.7.11 ACTIONS (continued)
CONDITION                 REQUIRED ACTION                        COMPLETION TIME D. Required Action and        D.1 ---------------NOTE--------------
associated Completion          Place in toxic gas Time of Condition A not        protection mode if met [in MODE 5 or 6, or]       automatic transfer to toxic during movement of             gas protection mode is
[recently] irradiated fuel     inoperable.
assemblies.                    -------------------------------------
Place OPERABLE                        Immediately CREACS train in emergency radiation protection mode.
OR D.2 Suspend movement of                   Immediately
[recently] irradiated fuel assemblies.
E. Two CREACS trains          E.1 Suspend movement of                   Immediately inoperable [in MODE 5          [recently] irradiated fuel or 6, or] during               assemblies.
movement of [recently]
irradiated fuel assemblies for reasons other than Condition B.
OR Required Actions and associated Completion Times of Condition B not met One or more CREACS trains inoperable due to an inoperable CRE boundary [in MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies.
CEOG STS                              3.7.11-3                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREACS 3.7.11 F. Two CREACS trains            F.1     Enter LCO 3.0.3.                Immediately inoperable in MODE 1, 2, 3, or 4 for reasons other than Condition B.
SURVEILLANCE REQUIREMENTS SURVEILLANCE                                     FREQUENCY SR 3.7.11.1         Operate each CREACS train for [ 10 continuous         31 days hours with heaters operating or (for systems without heaters)  15 minutes].
CEOG STS                                     3.7.11-4                        Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 Programs and Manuals 5.5 5.5   Programs and Manuals 5.5.17       Battery Monitoring and Maintenance Program This Program provides for battery restoration and maintenance, based on [the recommendations of IEEE Standard 450-1995, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications," or of the battery manufacturer] including the following
: a. Actions to restore battery cells with float voltage < [2.13] V, and
: b. Actions to equalize and test battery cells that had been discovered with electrolyte level below the minimum established design limit.
5.5.18       Control Room Envelope Habitability Program A Control Room Envelope (CRE) Habitability Program shall be established and implemented to ensure that CRE habitability is maintained such that, with an OPERABLE Control Room Emergency Air Cleanup System (CREACS), CRE occupants can control the reactor safely under normal conditions and maintain it in a safe condition following a radiological event, hazardous chemical release, or a smoke challenge. The program shall ensure that adequate radiation protection is provided to permit access and occupancy of the CRE under design basis accident (DBA) conditions without personnel receiving radiation exposures in excess of [5 rem whole body or its equivalent to any part of the body] [5 rem total effective dose equivalent (TEDE)] for the duration of the accident. The program shall include the following elements:
: a.       The definition of the CRE and the CRE boundary.
: b.       Requirements for maintaining the CRE boundary in its design condition including configuration control and preventive maintenance.
: c.       Requirements for (i) determining the unfiltered air inleakage past the CRE boundary into the CRE in accordance with the testing methods and at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, "Demonstrating Control Room Envelope Integrity at Nuclear Power Reactors," Revision 0, May 2003, and (ii) assessing CRE habitability at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0.
[The following are exceptions to Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0:
: 1. ;and]
: d.       Measurement, at designated locations, of the CRE pressure relative to all external areas adjacent to the CRE boundary during the pressurization mode of operation by one train of the CREACS, operating at the flow rate required by the VFTP, at a Frequency of [18] months on a STAGGERED CEOG STS                                      5.5-18                             Rev. 3.1, 12/01/05

TSTF-508, Rev. 1 Programs and Manuals 5.5 TEST BASIS. The results shall be trended and used as part of the periodic [18] month assessment of the CRE boundary.
: e. The quantitative limits on unfiltered air inleakage into the CRE. These limits shall be stated in a manner to allow direct comparison to the unfiltered air inleakage measured by the testing described in paragraph c.
The unfiltered air inleakage limit for radiological challenges is the inleakage flow rate assumed in the licensing basis analyses of DBA consequences. Unfiltered air inleakage limits for hazardous chemicals must ensure that exposure of CRE occupants to these hazards will be within the assumptions in the licensing basis.
: f. The provisions of SR 3.0.2 are applicable to the Frequencies for assessing CRE habitability, determining CRE unfiltered inleakage, and measuring CRE pressure and assessing the CRE boundary as required by paragraphs c and d, respectively.
CEOG STS                             5.5-19                            Rev. 3.1, 12/01/05

TSTF-508, Rev. 1 CREACS B 3.7.11 BASES ACTIONS  A.1 With one CREACS train inoperable, for reasons other than an inoperable CRE boundary, action must be taken to restore OPERABLE status within 7 days. In this Condition, the remaining OPERABLE CREACS train is adequate to perform the CRE occupant protection function. However, the overall reliability is reduced because a failure in the OPERABLE CREACS train could result in loss of CREACS function. The 7 day Completion Time is based on the low probability of a DBA occurring during this time period, and the ability of the remaining train to provide the required capability.
B.1, B.2, B.3, and B.43 If the unfiltered inleakage of potentially contaminated air past the CRE boundary and into the CRE can result in CRE occupant radiological dose greater than the calculated dose of the licensing basis analyses of DBA consequences (allowed to be up to [5 rem whole body or its equivalent to any part of the body] [5 rem TEDE]), or inadequate protection of CRE occupants from hazardous chemicals or smoke, the CRE boundary is inoperable. Actions must be taken to restore an OPERABLE CRE boundary within 90 days.
During the period that the CRE boundary is considered inoperable, action must be initiated to implement mitigating actions to lessen the effect on CRE occupants from the potential hazards of a radiological or chemical event or a challenge from smoke. If [recently] irradiated fuel assemblies are being moved, fuel movement must be immediately suspended to eliminate the possibility of a fuel handling accident. Actions must be taken within 24 hours to verify that in the event of a DBA, the mitigating actions will ensure that CRE occupant radiological exposures will not exceed the calculated dose of the licensing basis analyses of DBA consequences, and that CRE occupants are protected from hazardous chemicals and smoke. These mitigating actions (i.e., actions that are taken to offset the consequences of the inoperable CRE boundary) should be preplanned for implementation upon entry into the condition, regardless of whether entry is intentional or unintentional. The 24 hour Completion Time is reasonable based on the low probability of a DBA occurring during this time period, and the use of mitigating actions.
Following verification that the CRE occupants are protected, movement of
[recently] irradiated fuel assemblies may be resumed. The 90 day Completion Time is reasonable based on the determination that the mitigating actions will ensure protection of CRE occupants within analyzed limits while limiting the probability that CRE occupants will have to implement protective measures that may adversely affect their ability to control the reactor and maintain it in a safe shutdown condition in the event of a DBA. In addition, the 90 day Completion Time is a reasonable CEOG STS                      B 3.7.11-6                            Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREACS B 3.7.11 time to diagnose, plan and possibly repair, and test most problems with the CRE boundary.
CEOG STS                  B 3.7.11-7                             Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREACS B 3.7.11 C.1 and C.2 In MODE 1, 2, 3, or 4, if the inoperable CREACS or the CRE boundary cannot be restored to OPERABLE status within the required Completion Time, the unit must be placed in a MODE that minimizes the accident risk. To achieve this status, the unit must be placed in at least MODE 3 within 6 hours, and in MODE 5 within 36 hours. 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.
CEOG STS                  B 3.7.11-8                              Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 CREACS B 3.7.11 BASES ACTIONS (continued)
D.1 and D.2
[ In MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies, if Required Action A.1 cannot be completed within the required Completion Time, the OPERABLE CREACS train must be immediately placed in the emergency mode of operation. This action ensures that the remaining train is OPERABLE, that no failures preventing automatic actuation will occur, and that any active failure will be readily detected.
An alternative to Required Action D.1 is to immediately suspend activities that could result in a release of radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk. This does not preclude the movement of fuel assemblies to a safe position.
Required Action D.1 is modified by a Note indicating to place the system in the toxic gas protection mode if the automatic transfer to the toxic gas protection mode is inoperable.
E.1 When [in MODE 5 or 6, or] during movement of [recently] irradiated fuel assemblies, with two CREACS trains inoperable or with the Required Actions and associated Completion Times of Condition B not met, one or more CREACS trains inoperable due to an inoperable CRE boundary, action must be taken immediately to suspend activities that could result in a release of radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk. This does not preclude the movement of fuel to a safe position.
F.1 If both CREACS trains are inoperable in MODE 1, 2, 3, or 4 for reasons other than an inoperable CRE boundary (i.e., Condition B), the CREACS 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.
CEOG STS                             B 3.7.11-9                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[MCREC] System 3.7.4 3.7 PLANT SYSTEMS 3.7.4        [Main Control Room Environmental Control (MCREC)] System LCO 3.7.4              Two [MCREC] subsystems shall be OPERABLE.
                       ---------------------------------------------NOTE--------------------------------------------
The main control room envelope (CRE) boundary may be opened intermittently under administrative control.
APPLICABILITY:         MODES 1, 2, and 3, During movement of [recently] irradiated fuel assemblies in the
[secondary] containment, During operations with a potential for draining the reactor vessel (OPDRVs).
ACTIONS CONDITION                            REQUIRED ACTION                            COMPLETION TIME A. One [MCREC]                       A.1        Restore [MCREC]                          7 days subsystem inoperable                       subsystem to OPERABLE for reasons other than                     status.
Condition B.
B. One or more [MCREC]               B.1        Initiate action to implement             Immediately subsystems inoperable                      mitigating actions.
due to inoperable CRE boundary in MODE 1, 2,          AND or 3.
B.2        --------------NOTE--------------
Not required following completion of Required Action B.4.
Suspend movement of                      Immediately
[recently] irradiated fuel assemblies in the
[secondary] containment.
AND B.3        --------------NOTE--------------
Not required following BWR/4 STS                                            3.7.4-1                                     Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[MCREC] System 3.7.4 CONDITION                REQUIRED ACTION                        COMPLETION TIME completion of Required Action B.4.
Initiate action to suspend            Immediately OPDRVs.
AND B.24 Verify mitigating actions             24 hours ensure CRE occupant radiological exposures to radiological, chemical, and smoke hazards will not exceed limits, and CRE occupants are protected from chemical and smoke hazards.
AND B.35 Restore CRE boundary to               90 days OPERABLE status.
C. Required Action and      C.1  Be in MODE 3.                         12 hours associated Completion Time of Condition A or B AND not met in MODE 1, 2, or 3.                    C.2  Be in MODE 4.                         36 hours BWR/4 STS                             3.7.4-2                                Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[MCREC] System 3.7.4 ACTIONS (continued)
CONDITION                        REQUIRED ACTION                         COMPLETION TIME D. Required Action and        --------------------NOTE-------------------
associated Completion      LCO 3.0.3 is not applicable.
Time of Condition A not    ------------------------------------------------
met during movement of
[recently] irradiated fuel D.1        ---------------NOTE--------------
assemblies in the                     [ Place in toxic gas
[secondary] containment               protection mode if or during OPDRVs.                     automatic transfer to toxic gas protection mode is inoperable. ]
Place OPERABLE                        Immediately
[MCREC] subsystem in
[pressurization] mode.
OR D.2.1      Suspend movement of                   Immediately
[recently] irradiated fuel assemblies in the
[secondary] containment.
AND D.2.2      Initiate action to suspend            Immediately OPDRVs.
E. Two [MCREC]                E.1        Enter LCO 3.0.3.                      Immediately subsystems inoperable in MODE 1, 2, or 3 for reasons other than Condition B.
BWR/4 STS                                     3.7.4-3                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[MCREC] System 3.7.4 ACTIONS (continued)
CONDITION                          REQUIRED ACTION                         COMPLETION TIME F. Two [MCREC]                   --------------------NOTE-------------------
subsystems inoperable         LCO 3.0.3 is not applicable.
during movement of            ------------------------------------------------
[recently] irradiated fuel assemblies in the             F.1        Suspend movement of                   Immediately
[secondary] containment                  [recently] irradiated fuel or during OPDRVs for                     assemblies in the reasons other than                       [secondary] containment.
Condition B.
AND OR F.2        Initiate action to suspend            Immediately Required Actions and                     OPDRVs.
associated Completion Times of Condition B not met One or more
[MCREC] subsystems inoperable due to an inoperable CRE boundary during movement of [recently]
irradiated fuel assemblies in the
[secondary] containment or during OPDRVs.
SURVEILLANCE REQUIREMENTS SURVEILLANCE                                              FREQUENCY SR 3.7.4.1          Operate each [MCREC] subsystem for [ 10                         31 days continuous hours with the heaters operating or (for systems without heaters)  15 minutes].
SR 3.7.4.2          Perform required [MCREC] filter testing in                       In accordance accordance with the [Ventilation Filter Testing                  with the [VFTP]
Program (VFTP)].
SR 3.7.4.3          Verify each [MCREC] subsystem actuates on an                     [18] months actual or simulated initiation signal.
BWR/4 STS                                        3.7.4-4                                Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 Programs and Manuals 5.5 5.5   Programs and Manuals 5.5.14       Battery Monitoring and Maintenance Program This Program provides for battery restoration and maintenance, based on [the recommendations of IEEE Standard 450-1995, "IEEE Recommended Practice for Maintenance, Testing, and Replacement of Vented Lead-Acid Batteries for Stationary Applications," or of the battery manufacturer] of the following:
: a. Actions to restore battery cells with float voltage < [2.13] V, and
: b. Actions to equalize and test battery cells that had been discovered with electrolyte level below the minimum established design limit.
5.5.15       Control Room Envelope Habitability Program A Control Room Envelope (CRE) Habitability Program shall be established and implemented to ensure that CRE habitability is maintained such that, with an OPERABLE [Main Control Room Environmental Control (MCREC)] System, CRE occupants can control the reactor safely under normal conditions and maintain it in a safe condition following a radiological event, hazardous chemical release, or a smoke challenge. The program shall ensure that adequate radiation protection is provided to permit access and occupancy of the CRE under design basis accident (DBA) conditions without personnel receiving radiation exposures in excess of [5 rem whole body or its equivalent to any part of the body] [5 rem total effective dose equivalent (TEDE)] for the duration of the accident. The program shall include the following elements:
: a.       The definition of the CRE and the CRE boundary.
: b.       Requirements for maintaining the CRE boundary in its design condition including configuration control and preventive maintenance.
: c.       Requirements for (i) determining the unfiltered air inleakage past the CRE boundary into the CRE in accordance with the testing methods and at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, "Demonstrating Control Room Envelope Integrity at Nuclear Power Reactors," Revision 0, May 2003, and (ii) assessing CRE habitability at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0.
[The following are exceptions to Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0:
: 1. ;and]
: d.       Measurement, at designated locations, of the CRE pressure relative to all external areas adjacent to the CRE boundary during the pressurization mode of operation by one subsystem of the [MCREC] System, operating at the flow rate required by the VFTP, at a Frequency of [18] months on a BWR/4 STS                                     5.5-14                             Rev. 3.1, 12/01/05

TSTF-508, Rev. 1 Programs and Manuals 5.5 STAGGERED TEST BASIS. The results shall be trended and used as part of the periodic [18] month assessment of the CRE boundary.
: e. The quantitative limits on unfiltered air inleakage into the CRE. These limits shall be stated in a manner to allow direct comparison to the unfiltered air inleakage measured by the testing described in paragraph c.
The unfiltered air inleakage limit for radiological challenges is the inleakage flow rate assumed in the licensing basis analyses of DBA consequences. Unfiltered air inleakage limits for hazardous chemicals must ensure that exposure of CRE occupants to these hazards will be within the assumptions in the licensing basis.
: f. The provisions of SR 3.0.2 are applicable to the Frequencies for assessing CRE habitability, determining CRE unfiltered inleakage, and measuring CRE pressure and assessing the CRE boundary as required by paragraphs c and d, respectively.
BWR/4 STS                             5.5-15                            Rev. 3.1, 12/01/05

TSTF-508, Rev. 1
[MCREC] System B 3.7.4 BASES ACTIONS (continued)
B.1, B.2, B.3, B.4, and B.53 If the unfiltered inleakage of potentially contaminated air past the CRE boundary and into the CRE can result in CRE occupant radiological dose greater than the calculated dose of the licensing basis analyses of DBA consequences (allowed to be up to [5 rem whole body or its equivalent to any part of the body] [5 rem TEDE]), or inadequate protection of CRE occupants from hazardous chemicals or smoke, the CRE boundary is inoperable. Actions must be taken to restore an OPERABLE CRE boundary within 90 days.
During the period that the CRE boundary is considered inoperable, action must be initiated to implement mitigating actions to lessen the effect on CRE occupants from the potential hazards of a radiological or chemical event or a challenge from smoke. If [recently] irradiated fuel assemblies are being moved in the [secondary] containment or OPDRVs are being conducted, these activities must be immediately suspended to eliminate the possibility of a DBA. Actions must be taken within 24 hours to verify that in the event of a DBA, the mitigating actions will ensure that CRE occupant radiological exposures will not exceed the calculated dose of the licensing basis analyses of DBA consequences, and that CRE occupants are protected from hazardous chemicals and smoke. These mitigating actions (i.e., actions that are taken to offset the consequences of the inoperable CRE boundary) should be preplanned for implementation upon entry into the condition, regardless of whether entry is intentional or unintentional. The 24 hour Completion Time is reasonable based on the low probability of a DBA occurring during this time period, and the use of mitigating actions. Following verification that the CRE occupants are protected, movement of [recently] irradiated fuel assemblies in the [secondary] containment and OPDRVs may be resumed. The 90 day Completion Time is reasonable based on the determination that the mitigating actions will ensure protection of CRE occupants within analyzed limits while limiting the probability that CRE occupants will have to implement protective measures that may adversely affect their ability to control the reactor and maintain it in a safe shutdown condition in the event of a DBA. In addition, the 90 day Completion Time is a reasonable time to diagnose, plan and possibly repair, and test most problems with the CRE boundary.
C.1 and C.2 In MODE 1, 2, or 3, if the inoperable [MCREC] subsystem or the CRE boundary 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 BWR/4 STS                              B 3.7.4-6                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[MCREC] System B 3.7.4 MODE 3 within 12 hours and in MODE 4 within 36 hours. 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.
D.1, D.2.1 and D.2.2 The Required Actions of Condition D are modified by a Note indicating that LCO 3.0.3 does not apply. If moving [recently] irradiated fuel assemblies while in MODE 1, 2, or 3, the fuel movement is independent of reactor operations. Therefore, inability to suspend movement of
[recently] irradiated fuel assemblies is not sufficient reason to require a reactor shutdown.
BWR/4 STS                     B 3.7.4-7                              Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[MCREC] System B 3.7.4 BASES ACTIONS (continued)
During movement of [recently] irradiated fuel assemblies in the
[secondary] containment or during OPDRVs, if the inoperable [MCREC]
subsystem cannot be restored to OPERABLE status within the required Completion Time, the OPERABLE [MCREC] subsystem may be placed in the pressurization mode. This action ensures that the remaining subsystem is OPERABLE, that no failures that would prevent automatic actuation will occur, and that any active failure will be readily detected.
[ Required Action D.1 is modified by a Note alerting the operator to [place the system in the toxic gas protection mode if the toxic gas protection mode automatic transfer capability is inoperable. ]
An alternative to Required Action D.1 is to immediately suspend activities that present a potential for releasing radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk.
If applicable, movement of [recently] irradiated fuel assemblies in the
[secondary] containment must be suspended immediately. Suspension of these activities shall not preclude completion of movement of a component to a safe position. Also, if applicable, actions must be initiated immediately to suspend OPDRVs to minimize the probability of a vessel draindown and the subsequent potential for fission product release.
Actions must continue until the OPDRVs are suspended.
E.1 If both [MCREC] subsystems are inoperable in MODE 1, 2, or 3 for reasons other than an inoperable CRE boundary (i.e., Condition B), the
[MCREC] System may not be capable of performing the intended function and the unit is in a condition outsideof the accident analyses. Therefore, LCO 3.0.3 must be entered immediately.
F.1 and F.2 The Required Actions of Condition F are modified by a Note indicating that LCO 3.0.3 does not apply. If moving [recently] irradiated fuel assemblies while in MODE 1, 2, or 3, the fuel movement is independent of reactor operations. Therefore, inability to suspend movement of
[recently] irradiated fuel assemblies is not sufficient reason to require a reactor shutdown.
BWR/4 STS                             B 3.7.4-8                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[MCREC] System B 3.7.4 BASES ACTIONS (continued)
During movement of [recently] irradiated fuel assemblies in the
[secondary] containment or during OPDRVs, with two [MCREC]
subsystems inoperable for reasons other than Condition B or with the Required Actions and associated Completion Times of Condition B not metone or more [MCREC] subsystems inoperable due to an inoperable CRE boundary, action must be taken immediately to suspend activities that present a potential for releasing radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk.
If applicable, movement of [recently] irradiated fuel assemblies in the
[secondary] containment must be suspended immediately. Suspension of these activities shall not preclude completion of movement of a component to a safe position. If applicable, actions must be initiated immediately to suspend OPDRVs to minimize the probability of a vessel draindown and subsequent potential for fission product release. Actions must continue until the OPDRVs are suspended.
SURVEILLANCE      SR 3.7.4.1 REQUIREMENTS This SR verifies that a subsystem in a standby mode starts on demand and continues to operate. Standby systems should be checked periodically to ensure that they start and function properly. As the environmental and normal operating conditions of this system are not severe, testing each subsystem once every month provides an adequate check on this system. Monthly heater operation dries out any moisture that has accumulated in the charcoal as a result of humidity in the ambient air. [Systems with heaters must be operated for  10 continuous hours with the heaters energized. Systems without heaters need only be operated for  15 minutes to demonstrate the function of the system.]
Furthermore, the 31 day Frequency is based on the known reliability of the equipment and the two subsystem redundancy available.
SR 3.7.4.2 This SR verifies that the required [MCREC] testing is performed in accordance with the [Ventilation Filter Testing Program (VFTP)]. The
[VFTP] includes testing HEPA filter performance, charcoal adsorber efficiency, minimum system flow rate, and the physical properties of the activated charcoal (general use and following specific operations).
Specific test Frequencies and additional information are discussed in detail in the [VFTP].
BWR/4 STS                            B 3.7.4-9                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[CRFA] System 3.7.3 3.7 PLANT SYSTEMS 3.7.3        [Control Room Fresh Air (CRFA)] System LCO 3.7.3              Two [CRFA] subsystems shall be OPERABLE.
                       ---------------------------------------------NOTE--------------------------------------------
The control room envelope (CRE) boundary may be opened intermittently under administrative control.
APPLICABILITY:         MODES 1, 2, and 3, During movement of [recently] irradiated fuel assemblies in the [primary or secondary containment],
During operations with a potential for draining the reactor vessel (OPDRVs).
ACTIONS CONDITION                            REQUIRED ACTION                            COMPLETION TIME A. One [CRFA] subsystem              A.1        Restore [CRFA] subsystem                 7 days inoperable for reasons                     to OPERABLE status.
other than Condition B.
B. One or more [CRFA]                B.1        Initiate action to implement             Immediately subsystems inoperable                      mitigating actions.
due to inoperable CRE boundary in MODE 1, 2,          AND or 3.
B.2        --------------NOTE--------------
Not required following completion of Required Action B.4.
Suspend movement of                      Immediately
[recently] irradiated fuel assemblies in the [primary and secondary containment].
AND B.3        --------------NOTE--------------
BWR/6 STS                                            3.7.3-1                                     Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[CRFA] System 3.7.3 CONDITION                REQUIRED ACTION                        COMPLETION TIME Not required following completion of Required Action B.4.
Initiate action to suspend            Immediately OPDRVs.
AND B.42 Verify mitigating actions             24 hours ensure CRE occupant radiological exposures to radiological, chemical, and smoke hazards will not exceed limits, and CRE occupants are protected from chemical and smoke hazards.
AND B.53 Restore CRE boundary to               90 days OPERABLE status.
C. Required Action and      C.1  Be in MODE 3.                         12 hours associated Completion Time of Condition A or B AND not met in MODE 1, 2, or 3.                    C.2  Be in MODE 4.                         36 hours BWR/6 STS                             3.7.3-2                                Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[CRFA] System 3.7.3 ACTIONS (continued)
CONDITION                       REQUIRED ACTION                         COMPLETION TIME D. Required Action and        --------------------NOTE-------------------
associated Completion      LCO 3.0.3 is not applicable.
Time of Condition A not    ------------------------------------------------
met during movement of
[recently] irradiated fuel D.1        ---------------NOTE--------------
assemblies in the                     [ Place in toxic gas
[primary or secondary                 protection mode if containment] or during                automatic transfer to toxic OPDRVs.                               gas protection mode is inoperable. ]
Place OPERABLE [CRFA]                 Immediately subsystem in [isolation]
mode.
OR D.2.1      Suspend movement of                   Immediately
[recently] irradiated fuel assemblies in the [primary and secondary containment].
AND D.2.2      Initiate action to suspend            Immediately OPDRVs.
E. Two [CRFA] subsystems      E.1        Enter LCO 3.0.3.                      Immediately inoperable in MODE 1, 2, or 3 for reasons other than Condition B.
BWR/6 STS                                     3.7.3-3                               Rev. 3.0, 03/31/04

TSTF-508, Rev. 1
[CRFA] System 3.7.3 ACTIONS (continued)
CONDITION                         REQUIRED ACTION                         COMPLETION TIME F. Two [CRFA] subsystems        --------------------NOTE-------------------
inoperable during            LCO 3.0.3 is not applicable.
movement of [recently]       ------------------------------------------------
irradiated fuel assemblies in the            F.1        Suspend movement of                   Immediately
[primary or secondary                   [recently] irradiated fuel containment] or during                  assemblies in the [primary OPDRVs for reasons                      and secondary other than Condition B.                 containment].
OR                              AND Required Actions and         F.2        Initiate action to suspend            Immediately associated Completion                   OPDRVs.
Times of Condition B not met One or more
[CRFA] subsystems inoperable due to inoperable CRE boundary during movement of [recently]
irradiated fuel assemblies in the
[primary or secondary containment] or during OPDRVs.
SURVEILLANCE REQUIREMENTS SURVEILLANCE                                               FREQUENCY SR 3.7.3.1         Operate each [CRFA] subsystem for [ 10                          31 days continuous hours with the heaters operating or (for systems without heaters)  15 minutes].
SR 3.7.3.2         Perform required [CRFA] filter testing in accordance             In accordance with the [Ventilation Filter Testing Program (VFTP)].            with the [VFTP]
SR 3.7.3.3         Verify each [CRFA] subsystem actuates on an                      [18] months actual or simulated initiation signal.
BWR/6 STS                                       3.7.3-4                                Rev. 3.0, 03/31/04

TSTF-508, Rev. 1 Programs and Manuals 5.5 5.5.15    Control Room Envelope Habitability Program A Control Room Envelope (CRE) Habitability Program shall be established and implemented to ensure that CRE habitability is maintained such that, with an OPERABLE [Control Room Fresh Air (CRFA)] System, CRE occupants can control the reactor safely under normal conditions and maintain it in a safe condition following a radiological event, hazardous chemical release, or a smoke challenge. The program shall ensure that adequate radiation protection is provided to permit access and occupancy of the CRE under design basis accident (DBA) conditions without personnel receiving radiation exposures in excess of [5 rem whole body or its equivalent to any part of the body] [5 rem total effective dose equivalent (TEDE)] for the duration of the accident. The program shall include the following elements:
: a.      The definition of the CRE and the CRE boundary.
: b.      Requirements for maintaining the CRE boundary in its design condition including configuration control and preventive maintenance.
: c.      Requirements for (i) determining the unfiltered air inleakage past the CRE boundary into the CRE in accordance with the testing methods and at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, "Demonstrating Control Room Envelope Integrity at Nuclear Power Reactors," Revision 0, May 2003, and (ii) assessing CRE habitability at the Frequencies specified in Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0.
[The following are exceptions to Sections C.1 and C.2 of Regulatory Guide 1.197, Revision 0:
: 1. ;and]
: d.      Measurement, at designated locations, of the CRE pressure relative to all external areas adjacent to the CRE boundary during the pressurization mode of operation by one subsystem of the [CRFA] System, operating at the flow rate required by the VFTP, at a Frequency of [18] months on a STAGGERED TEST BASIS. The results shall be trended and used as part of the periodic [18] month assessment of the CRE boundary.
: e.      The quantitative limits on unfiltered air inleakage into the CRE. These limits shall be stated in a manner to allow direct comparison to the unfiltered air inleakage measured by the testing described in paragraph c.
The unfiltered air inleakage limit for radiological challenges is the inleakage flow rate assumed in the licensing basis analyses of DBA consequences. Unfiltered air inleakage limits for hazardous chemicals must ensure that exposure of CRE occupants to these hazards will be within the assumptions in the licensing basis.
: f.      The provisions of SR 3.0.2 are applicable to the Frequencies for assessing CRE habitability, determining CRE unfiltered inleakage, and BWR/6 STS                                  5.5-14                            Rev. 3.1, 12/01/05

TSTF-508, Rev. 1 Programs and Manuals 5.5 measuring CRE pressure and assessing the CRE boundary as required by paragraphs c and d, respectively.
BWR/6 STS                      5.5-15                      Rev. 3.1, 12/01/05

TSTF-508, Rev. 1
[CRFA] System B 3.7.3 BASES APPLICABILITY (continued)
: a. During operations with a potential for draining the reactor vessel (OPDRVs) and
: b. During movement of [recently] irradiated fuel assemblies in the
[primary or secondary containment]. [Due to radioactive decay, the CRFA System is only required to be OPERABLE during fuel handling involving handling recently irradiated fuel (i.e., fuel that has occupied part of a critical reactor core within the previous [X] days).]
ACTIONS           A.1 With one [CRFA] subsystem inoperable for reasons other than an inoperable CRE boundary, the inoperable [CRFA] subsystem must be restored to OPERABLE status within 7 days. With the unit in this condition, the remaining OPERABLE [CRFA] subsystem is adequate to perform the CRE occupant protection function. However, the overall reliability is reduced because a failure in the OPERABLE subsystem could result in loss of [CRFA] System function. The 7 day Completion Time is based on the low probability of a DBA occurring during this time period, and that the remaining subsystem can provide the required capabilities.
B.1, B.2, B.3, B.4, and B.53 If the unfiltered inleakage of potentially contaminated air past the CRE boundary and into the CRE can result in CRE occupant radiological dose greater than the calculated dose of the licensing basis analyses of DBA consequences (allowed to be up to [5 rem whole body or its equivalent to any part of the body] [5 rem TEDE]), or inadequate protection of CRE occupants from hazardous chemicals or smoke, the CRE boundary is inoperable. Actions must be taken to restore an OPERABLE CRE boundary within 90 days.
During the period that the CRE boundary is considered inoperable, action must be initiated to implement mitigating actions to lessen the effect on CRE occupants from the potential hazards of a radiological or chemical event or a challenge from smoke. If [recently] irradiated fuel assemblies are being moved in the [primary or secondary] containment or OPDRVs are being conducted, these activities must be immediately suspended to eliminate the possibility of a DBA. Actions must be taken within 24 hours to verify that in the event of a DBA, the mitigating actions will ensure that CRE occupant radiological exposures will not exceed the calculated dose of the licensing basis analyses of DBA consequences, and that CRE occupants are protected from hazardous chemicals and smoke. These mitigating actions (i.e., actions that are taken to offset the consequences BWR/6 STS                               B 3.7.3-5                               Rev. 3.0, 03/31/04

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[CRFA] System B 3.7.3 of the inoperable CRE boundary) should be preplanned for implementation upon entry into the condition, regardless of whether entry is intentional or unintentional. The 24 hour Completion Time is reasonable based on the low probability of a DBA occurring during this time period, and the use of mitigating actions. Following verification that the CRE occupants are protected, movement of [recently] irradiated fuel assemblies in the [primary and secondary] containment and OPDRVs may be resumed. The 90 day Completion Time is reasonable based on the determination that the mitigating actions will ensure protection of CRE occupants within analyzed limits while limiting the probability that CRE occupants will have to implement protective measures that may adversely affect their ability to control the reactor and maintain it in a safe shutdown condition in the event of a DBA. In addition, the 90 day Completion Time is a reasonable time to diagnose, plan and possibly repair, and test most problems with the CRE boundary.
BWR/6 STS                      B 3.7.3-6                               Rev. 3.0, 03/31/04

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[CRFA] System B 3.7.3 BASES ACTIONS (continued)
C.1 and C.2 In MODE 1, 2, or 3, if the inoperable [CRFA] subsystem or the CRE boundary 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 12 hours and in MODE 4 within 36 hours. 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.
D.1, D.2.1 and D.2.2 The Required Actions of Condition D are modified by a Note indicating that LCO 3.0.3 does not apply. If moving [recently] irradiated fuel assemblies while in MODE 1, 2, or 3, the fuel movement is independent of reactor operations. Therefore, inability to suspend movement of
[recently] irradiated fuel assemblies is not sufficient reason to require a reactor shutdown.
During movement of [recently] irradiated fuel assemblies in the [primary or secondary containment] or during OPDRVs, if the inoperable [CRFA]
subsystem cannot be restored to OPERABLE status within the required Completion Time, the OPERABLE [CRFA] subsystem may be placed in the isolation mode. This action ensures that the remaining subsystem is OPERABLE, that no failures that would prevent automatic actuation will occur, and that any active failure will be readily detected.
[ Required Action D.1 is modified by a Note alerting the operator to place the system in the toxic gas protection mode if the toxic gas protection mode automatic transfer capability is inoperable. ]
An alternative to Required Action D.1 is to immediately suspend activities that present a potential for releasing radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk.
If applicable, movement of [recently] irradiated fuel assemblies in the
[primary and secondary containment] must be suspended immediately.
Suspension of these activities shall not preclude completion of movement of a component to a safe position. Also, if applicable, actions must be initiated immediately to suspend OPDRVs to minimize the probability of a vessel draindown and subsequent potential for fission product release.
Actions must continue until the OPDRVs are suspended.
BWR/6 STS                             B 3.7.3-7                              Rev. 3.0, 03/31/04

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[CRFA] System B 3.7.3 BASES ACTIONS (continued)
E.1 If both [CRFA] subsystems are inoperable in MODE 1, 2, or 3 for reasons other than an inoperable CRE boundary (i.e., Condition B), the [CRFA]
System may not be capable of performing the intended function and the unit is in a condition outside of the accident analyses. Therefore, LCO 3.0.3 must be entered immediately.
F.1 and F.2 The Required Actions of Condition F are modified by a Note indicating that LCO 3.0.3 does not apply. If moving [recently] irradiated fuel assemblies while in MODE 1, 2, or 3, the fuel movement is independent of reactor operations. Therefore, inability to suspend movement of
[recently] irradiated fuel assemblies is not sufficient reason to require a reactor shutdown.
During movement of [recently] irradiated fuel assemblies in the [primary or secondary containment] or during OPDRVs, with two [CRFA]
subsystems inoperable for reaons other than Condition B or with the Required Actions and associated Completion Times of Condition B not metone or more [CRFA] subsystems inoperable due to an inoperable CRE boundary, action must be taken immediately to suspend activities that present a potential for releasing radioactivity that might require isolation of the CRE. This places the unit in a condition that minimizes the accident risk.
If applicable, movement of [recently] irradiated fuel assemblies in the
[primary and secondary containment] must be suspended immediately.
Suspension of these activities shall not preclude completion of movement of a component to a safe position. If applicable, actions must be initiated immediately to suspend OPDRVs to minimize the probability of a vessel draindown and subsequent potential for fission product release. Actions must continue until the OPDRVs are suspended.
SURVEILLANCE      SR 3.7.3.1 REQUIREMENTS This SR verifies that a subsystem in a standby mode starts on demand and continues to operate. Standby systems should be checked periodically to ensure that they start and function properly. As the environmental and normal operating conditions of this system are not severe, testing each subsystem once every month provides an adequate check on this system. Monthly heater operation dries out any moisture accumulated in the charcoal from humidity in the ambient air. [Systems BWR/6 STS                             B 3.7.3-8                              Rev. 3.0, 03/31/04}}