Text

License Amendment Request (LAR)04-010, Application for Technical Specification Improvement Regarding Steam Generator Tube Integrity
	ML053620367
Person / Time
Site:	Comanche Peak
Issue date:	12/16/2005
From:	Blevins M, Madden F; TXU Generation Co, LP, TXU Power
To:	; Document Control Desk, Office of Nuclear Reactor Regulation
References
	CPSES-20051994, TXX-05182
	Download: ML053620367 (95)
	v • d • e

TXU Power Mike Blevins Senior Vice President &

1XU Power Chief Nuclear Officer Ref: 10CFR50.90 Comanche Peak Steam Electdric Station P.O. Box 1002 (E01)

Glen Rose, TX 76043 Tel: 254 897 5209 Fax: 254 897 6652 mike.blevinsrtx.com CPSES-20051994 Log # TXX-05182 File # 00236 December 16, 2005 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555

SUBJECT:

COMANCHE PEAK STEAM ELECTRIC STATION (CPSES)

DOCKET NOS. 50-445 AND 50-446 LICENSE AMENDMENT REQUEST (LAR)04-010 APPLICATION FOR TECHNICAL SPECIFICATION IMPROVEMENT REGARDING STEAM GENERATOR TUBE INTEGRITY REF: NRC Notice of Availability published on May 6, 2005 (70 FR 24126)

Dear Sir or Madam:

Pursuant to 10CFR50.90, TXU Generation Company LP (TXU Power) hereby requests an amendment to the CPSES Unit 1 Operating License (NPF-87) and CPSES Unit 2 Operating License (NPF-89) by incorporating the attached change into the CPSES Unit 1 and 2 Technical Specifications (TS). This change request applies to both Units.

The proposed amendment would revise the TS requirements related to steam generator (SG) tube integrity. The change is generally consistent with NRC-approved Revision 4 to Technical Specification Task Force (TSTF) Standard Technical Specification Change Traveler, TSTF-449, "Steam Generator Tube Integrity." The availability of this TS improvement was announced in the Federal Register on May 6, 2005 (70 FR 24126) as part of the consolidated line item improvement process (CLIIP).

A member of the STARS (Strategic Teaming and Resource Sharing) Alliance Callaway

Comanche Peak

Diablo Canyon

Palo Verde

South Texas Project

Wolf Creek

TXX-05182 Page 2 of 3 Modification has been made to the Technical Specification 5.5.9, "Steam Generator (SG) Program" section as provided by the TSTF to allow continued use of the existing Unit 1 Alternate Repair Criteria (ARC) and repair methods for the remainder of its current operating cycle. The Unit 1 steam generators (SGs) are scheduled to be replaced at the end of the current operating cycle in the Spring of 2007, and a separate license amendment request will be submitted to remove the ARCs and repair methods which are not required for the replacement SGs, thereby making the resulting TSs fully consistent with the TSTF. provides a detailed description of the proposed changes, a technical analysis of the proposed changes, TXU Power's determination that the proposed changes do not involve a significant hazard consideration, a regulatory analysis of the proposed changes and an environmental evaluation. Attachment 2 provides the affected Technical Specification (TS) pages marked-up to reflect the proposed changes. Attachment 3 provides proposed changes to the Technical Specification Bases. Attachment 4 provides retyped Technical Specification pages which incorporate the requested changes. Attachment 5 provides retyped Technical Specification Bases pages which incorporate the proposed changes.

TXU Power requests approval of the proposed License Amendment by June 1, 2006, to be implemented within 120 days of the issuance of the license amendment. This date will allow an orderly implementation of these changes prior to the Fall 2006 refueling outage on Unit 2 (2RF09).

In accordance with IOCFR50.91(b), TXU Power is providing the State of Texas with a copy of this proposed amendment.

This communication contains no new or revised commitments.

Should you have any questions, please contact Mr. Bob Kidwell at (254) 897-5310.

TXX-05 182 Page 3 of 3 I state under penalty of perjury that the foregoing is true and correct.

Executed on 16 December, 2005 Sincerely, TXU Generation Company LP By: TXU Generation Management Company LLC Its General Partner Mike Blevins By: I2 I 2

/re W. Madden Director, Regulatory Affairs RJK Attachments 1. Description and Assessment

2. Proposed Technical Specifications Changes

3. Proposed Technical Specifications Bases Changes

4. Retyped Technical Specification Pages

5. Retyped Technical Specification Bases Pages c - B. S. Mallett, Region IV M. C. Thadani, NRR Resident Inspectors, CPSES Ms. Alice Rogers Bureau of Radiation Control Texas Department of Public Health 1100 West 49th Street Austin, Texas 78756-3189

ATTACHMENT 1 to TXX-05182 DESCRIPTION AND ASSESSMENT

Attachment I to TXX-05 182 Page 2 of 8 LICENSEE'S EVALUATION

1.0 DESCRIPTION

2.0 PROPOSED CHANGE

3.0 BACKGROUND

4.0 TECHNICAL ANALYSIS

5.0 REGULATORY ANALYSIS

5.1 Verification and Commitments 5.2 No Significant Hazards Consideration 5.3 Applicable Regulatory Requirements/Criteria

6.0 ENVIRONMENTAL CONSIDERATION

7.0 PRECEDENTS

8.0 REFERENCES

to TXX-05182 Page 3 of 8

1.0 DESCRIPTION

By this letter, TXU Generation Company LP (TXU Power) requests an amendment to the Comanche Peak Steam Electric Station (CPSES) Unit 1 Operating License (NPF-87) and Unit 2 Operating License (NPF-89) by incorporating the attached changes into the CPSES Unit 1 and 2 Technical Specifications (TS). The proposed license amendment 04-010 revises the TS requirements related to steam generator tube integrity. The changes are consistent with NRC approved Technical Specification Task Force (TSTF)

Standard Technical Specification Change Traveler, TSTF-449, "Steam Generator Tube Integrity," Revision 4 (Reference 8.3). The availability of this technical specification improvement was announced in the Federal Register on May 6, 2005 (Reference 8.2) as part of the consolidated line item improvement process (CLIIP).

2.0 PROPOSED CHANGE

Consistent with the NRC-approved Revision 4 of TSTF-449, the proposed TS changes include:

Revised TS definition of LEAKAGE

Revised TS 3.4.13, "RCS [Reactor Coolant System] Operational Leakage"

New TS 3.4.17, "Steam Generator (SG) Tube Integrity"

Revised TS 5.5.9, "Steam Generator (SG) Program"

New TS 5.6.9, "Steam Generator Tube Inspection Report"

Revised 5.6.10, "Steam Generator Tube Inspection Report" The current Comanche Peak Steam Electric Station (CPSES) Unit 1 SGs are scheduled to be replaced at the end of the current operating cycle in the Spring of 2007. For this limited duration, TXU Generation Company LP (TXU Power) is proposing to leave the existing TS 5.5.9, "Steam Generator (SG) Tube Surveillance Program" (administratively renamed TS 5.5.9.1, "Steam Generator (SG) Program") in place for the remainder of the current Unit 1 operating cycle to allow use of the approved alternate repair criteria and tube repair methods contained therein. The new TS 5.5.9.2 is fully consistent with the proposed TS 5.5.9 as provided by the TSTF and is clearly marked for its applicability only to the current Unit 2 SGs and the replacement Unit 1 SGs. In addition, TS 5.6.10 (marked as applicable only to the current Unit 1 D-4 SGs) has also been retained to ensure the current approved Unit 1 specific reporting criteria are retained until the Unit 1 SGs are replaced in 2007. This modification of TSs 5.5.9 and 5.6, as provided by the TSTF, is judged the best method of incorporating the existing approved alternate repair criteria and tube repair methods for the limited duration of their remaining applicability.

A separate license amendment request will be submitted to administratively remove TS 5.5.9.1, with its included alternate repair criteria and tube repair methods which are not required (or approved) for the replacement SGs, and TS 5.6.10 thereby making the resulting TS fully consistent with TSTF-449.

to TXX-05182 Page 4 of 8 TXU Power has reviewed the safety evaluation (SE) (Reference 8.1), the information provided to support TSTF-449, and the changes associated with Revision 4 to TSTF-449 and has concluded that the justifications presented in the TSTF-449 proposal and the SE prepared by the NRC staff are applicable to the proposed deviation from TSTF-449 as discussed above. This is considered to be a non-material deviation from TSTF-449 as noticed in the Federal Register (Reference 8.2).

Proposed revisions to the CPSES TS Bases are also included in this application. As discussed in the NRC's model safety evaluation, adoption of the revised TS Bases associated with TSTF-449, Revision 4 is an integral part of implementing this TS improvement. The changes to the affected TS Bases pages will be incorporated in accordance with CPSES TS 5.5.14 "Technical Specifications (TS) Bases Control Program."

No changes to the CPSES Final Safety Analysis Report are anticipated at this time as a result of this License Amendment Request.

3.0 BACKGROUND

The background, regulatory requirements, and guidance associated with this application is adequately addressed by the NRC Notice of Availability published on May 6, 2005 (Reference 8.2), the NRC Notice for Comment published on March 2, 2005 (Reference 8.1), and TSTF-449, Revision 4 (Reference 8.3).

4.0 TECHNICAL ANALYSIS

TXU Generation Company LP (TXU Power) has reviewed the safety evaluation (SE)

(Reference 8.1) published as part of the CLIIP Notice for Comment. This included the NRC staffs SE, the supporting information provided to support TSTF-449, and the changes associated with Revision 4 to TSTF-449. TXU Power has concluded that the justifications presented in the TSTF proposal, and the SE prepared by the NRC staff, are applicable to Comanche Peak Steam Electric Station (CPSES) Unit 1 (Operating License NPF-87) and Unit 2 (Operating License NPF-89) and justify this amendment for the incorporation of the changes to CPSES Unit 1 and 2 Technical Specifications.

Attachment I to TXX-05 182 Page 5 of 8

5.0 REGULATORY ANALYSIS

5.1 Verification and Commitments The following information is provided to support the NRC staff's review of this amendment application:

Plant Name, Unit No. Comanche Peak, Unit I (scheduled SG replacement Spring 2007)

Steam Generator Model(s): Westinghouse model D4 Effective Full Power Years -13 (EFPY) of service for currently installed SGs Tubing Material 600 MA Number of tubes per SG 4578 Number and percentage of tubes 1 - 61 (1.40%)

plugged in each SG 2 - 78 (2.01%)

3 - 97 (2.40%)

4 - 100 (2.51%)

Number of tubes repaired in each I - 78 SG 2- 379 3 - 368 4- 398 Degradation mechanism(s) Axial ODSCC in the freespan Identified Axial ODSCC in freespan dings Axial PWSCC at the hotleg TTS transition Circ ODSCC at the hotleg TTS transition Axial ODSCC at the hotleg TTS transition Axial ODSCC at hotleg TSP intersections Circ PWSCC at the hotleg TTS transition Axial PWSCC within the hotleg tubesheet below F*

Oblique PWSCC in higher row (> row 2) u-bends Current primary-to-secondary 150 gallons per day per SG, evaluated at room leakage limits: temperature.

Approved Alternate Tube Repair Criteria (ARC): 1. The use of voltage-based repair criteria was

1. Voltage-based repairs (1.OV) approved in Amendment 70 to the Tech Specs on September 30, 1999.

2. Definition of an Fi tube 2. F* tube definition was approved in Amendment 71 to the Tech Specs on September 30, 1999.

Approved SG Tube Repair Methods

1. Laser Welded Sleeves 1. Laser welded sleeves were approved in Amendment 83 to the Tech Specs on March 19, 2001. Sleeve plugging limit is 43% of the nominal wall thickness.

2. Leak Tight Sleeves 2. Leak tight sleeves were approved in Amendment 101 to the Tech Specs on October 8, 2002. Sleeve plugging limit is 20% of the nominal wall thickness.

3. Leak Limiting Alloy 800 3. Leak limiting Alloy 800 sleeves were approved in Sleeves Amendment 112 to the Tech Specs on April 7, 2004. Sleeve plugging limit is plug upon detection regardless of depth.

Performance criteria for accident I gallon per minute (GPM) leakage I to TXX-05182 Page 6 of 8 5.1 Verification and Commitments (continued)

Plant Name, Unit No. Comanche Peak, Unit 2 Steam Generator Model(s): Westinghouse model D5 Effective Full Power Years -10.5 (EFPY) of service for currently installed SGs Tubing Material 600TT Number of tubes per SG 4570 Number and percentage of tubes 1 -20 (0.44%)

plugged in each SG 2 - 14 (0.3 1%)

3-14(0.31%)

4 - 17 (0.38%)

Number of tubes repaired in each None SG Degradation mechanism(s) None Identified Current primary-to-secondary 1 gallon per minute total for all 4 SGs, and 500 gallons per leakage limits: day through any one SG, both evaluated at room temperature.

Approved Alternate Tube Repair None Criteria (ARC)

Approved SG Tube Repair n/a Methods Performance criteria for accident 1 gallon per minute (GPM) leakage Plant Name, Unit No. Comanche Peak, Unit I - Replacement SG (Scheduled to be installed Spring 2007)

Steam Generator Model(s): Westinghouse model Delta 76 Effective Full Power Years n/a, not yet installed (EFPY) of service for currently installed SGs Tubing Material 690TT Number of tubes per SG 5532 Number and percentage of tubes n/a, not yet installed plugged in each SG Number of tubes repaired in each n/a, not yet installed SG Degradation mechanism(s) n/a, not yet installed Identified Current primary-to-secondary n/a, not yet installed leakage limits:

Approved n/a Alternate Tube Repair Criteria (ARC)

Approved SG Tube Repair n/a Methods Performance criteria for accident n/a, not yet installed leakage to TXX-05 182 Page 7 of 8 5.2 No Significant Hazards Consideration TXU Generation Company LP (TXU Power) has reviewed the proposed no significant hazards consideration determination (Reference 8.1) published as part of the CLIIP. TXU Power has concluded that the proposed determination presented in the notice is applicable to Comanche Peak Steam Electric Station (CPSES) Units 1 and 2 and the determination is hereby incorporated by reference to satisfy the requirements of 10 CFR 50.91(a).

5.2 Applicable Regulatory Requirements/Criteria A description of this proposed change and its relationship to applicable regulatory requirements and guidance was provided in the NRC Notice of Availability (Reference 8.2), the NRC Notice for Comment (Reference 8.1), and TSTF-449, Revision 4 (Reference 8.3).

In conclusion, 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 Commission's regulations, and (3) the issuance of the amendment will not be inimical to the common defense and security or to the health and safety of the public.

6.0 ENVIRONMENTAL CONSIDERATION

TXU Generation Company LP (TXU Power) has reviewed the environmental evaluation included in the model SE (Reference 8.1) as part of the CLIIP. TXU Power has concluded that the staff's findings presented in that evaluation are applicable to Comanche Peak Steam Electric Station (CPSES) Units 1 and 2 and the evaluation is hereby incorporated by reference for this application.

7.0. PRECEDENTS This application is being made in accordance with the CLIIP. TXU Generation Company LP (TXU Power) is not proposing material deviations from the Technical Specification (TS) changes described in TSTF-449, Revision 4 (Reference 8.3), or the NRC staff's model SE (Reference 8.1).

to TXX-05182 Page 8 of 8

8.0 REFERENCES

8.1 Federal Register Notice, "Notice of Opportunity To Comment on Model Safety Evaluation on Technical Specification Improvement To Modify Requirements Regarding The Addition of LCO 3.4.[17] on Steam Generator Tube Integrity Using the Consolidated Line Item Improvement Process;" March 2, 2005 (70 FR 10298).

8.2 Federal Register Notice, "Notice of Availability of Model Application Concerning Technical Specification Improvement To Modify Requirements Regarding Steam Generator Tube Integrity Using the Consolidated Line Item Improvement Process;" May 6, 2005 (70 FR 24126).

8.3 Technical Specification Task Force (TSTF) Improved Standard Technical Specifications Change Traveler, TSTF-449, "Steam Generator Tube Integrity,"

Revision 4.

ATTACHMENT 2 to TXX-05182 PROPOSED TECHNICAL SPECIFICATION CHANGES (MIARK-UP)

Pages ii 1.1-4 3.4-33 3.4-34 3.4-48 (new page) 3.449 (new page) 5.0-13 5.0-14 5.0-15 5.0-1Sa 5.0-16 5.0-16a 5.0-17 5.0-17a 5.0-18 5.0-19 5.0-19a Insert 5.5.9.2 (page 1 of 3)

Insert 5.5.9.2 (page 2 of 3)

Insert 5.5.9.2 (page 3 of 3) 5.0-36 5.0-36a Insert 5.6.9

TXX-05182 Attachment 2 Page 2 of 24 TABLE OF CONTENTS (continued) 3.4 REACTOR COOLANT SYSTEM (RCS) ................................................ 3.4-1 3.4.1 RCS Pressure, Temperature, and Flow Departure from Nudeate Boiling (DNB) Limits ............................................ 3.4-1 3.4.2 RCS Minimum Temperature for Criticality ............................................ 3.4-4 3.4.3 RCS Pressure and Temperature (PIT) Limits ............................................ 3.4-5 3.4.4 RCS Loops - MODES I and 2............................................ 3.4-7 3.4.5 RCS Loops - MODE 3 ............................................ 3.4-8 3.4.6 RCS Loops - MODE 4 ............................................ 3.4-11 3.4.7 RCS Loops- MODE 5, Loops Filled ............................................ 3.4-14 3.4.8 RCS Loops - MODE 5, Loops Not Filled............................................ 3.4-17 3.4.9 Pressurizer ............................................ 3.4-19 3.4.10 Pressurizer Safety Valves ............................................ 3.4-21 3.4.11 Pressurizer Power Operated Relief Valves (PORVs) ........................................ 3.4-23 3.4.12 Low Temperature Overpressure Protection (LTOP) System ............................ 3.4-27 3.4.13 RCS Operational LEAKAGE ............................................ 3.4-33 3.4.14 RCS Pressure Isolation Valve (PIV) Leakage ............................................ 3.4-35 3.4.15 RCS Leakage Detection Instrumentation ............................................ 3.4-40 3.4.16 RCS Specific Activity ............................................ 3.4-44 35 EMERGENCY CORE COOLING SYSTEMS (ECCS) ..................................... 3.5-1 3.5.1 Accumulators ..................................... 3.5-1 3.5.2 ECCS - Operating ..................................... 3.5-4 3.5.3 ECCS - Shutdown ..................................... 3.5-8 3.5.4 Refueling Water Storage Tank (RWST) ..................................... 3.5-10 3.5.5 Sea Injection l Flow ..................................... 3.5-12 3.6 CONTAINMENT SYSTEMS .. ................................... 3.6-1 3.6.1 3.6.2 3.6.3

\ Containment .....................................

Containment Air Locks.3.6-2 Containment Isolation Valves .3.6-7 3.6-1 3.6.4 Containment Pressure .3.6-16 3.6.5 Containment Air Temperature. 3.6-17 3.6.6 Containment Spray System. 3.6-18 3.6.7 Spray Additive System.3.6-20 I

COMANCHE PEAK - UNITS 1 AND 2 ii Amendment No. 81, I117

TXX-05182 Attachment 2 Page 3 of 24 Definitions 1.1 1.1 Definitions (continued)

LEAKAGE LEAKAGE shall be:

a. Identified LEAKAGE

1. LEAKAGE, such as that from pump seals or valve packing (except reactor coolant pump (RCP) seal water injection or leakoff), that is captured and conducted to collection systems or a sump or collecting tank;

2. LEAKAGE into the containment atmosphere from (primary to secondary LEAKAGE) sources that are both specifically located and known either not to interfere with the operation of leakage e sytems or not to be pressure boundary LEAKG;

3. Reactor Coolant System (RCS hrough a steam generator (&G) to the Secondary Syste

b. Unidentified LEAKAGE I primary to secondary All LEAKAGE (except RCP seal water injection or leakoff) that is not identified LEAKAGE;

c. PesrBudarv LEAKAGE LEAKAGE (except LEAKAGE) through a nonisolable fault in an RCS component body, pipe wall, or vessel wall.

MASTER RELAY TEST A MASTER RELAY TEST shall consist of energizing all master relays in the channel required for channel OPERABILITY and verifying the OPERABILITY of each required master relay. The MASTER RELAY TEST shall include a continuity check of each associated required slave relay. The MASTER RELAY TEST may be performed by means of any series of sequential, overlapping or total steps.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 1.1 -4 Amendment No. 64

TXX-05182 Attachment 2 Page 4 of 24 RCS Operational LEAKAGE 3.4.13 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.13 RCS Operational LEAKAGE LCO 3.4.13 RCS operational LEAKAGE shall be limited to:

a. No pressure boundary LEAKAGE;

b. 1 gpm unidentified LEAKAGE;

c. 10 gpm identified LEAKAGE; and

. 4 4,toa, ;.I - P I CC1A f, AV t +k-aC -11 81W111 A 11 Ado Iu. l uepell IUIdI UIIIIIdIV IU bL.;bUIIUdIV LEft.BlZ IIIIUUUU An - -E ARnrAtors for U nrit 2 12r.): and E< e:- 150 gallons per day for Unit 1 and 600 gallone per day feF W~it 2 primary 1 70 to secondary LEAKAGE through any one SG.

APPLICABILITY: MODES 1, 2, 3, and 4 ACTIONS Y Y IOperational CONDITION REQUIRED ACTION COMPLETION TIME 4 4 A. RCS LEAKAGE not within A.1 Reduce LEAKAGE to 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months limits for reasons other than within limits.

pressure boundary LEAKAGES or primary to secondary LEAKAGE B. Required Action and B.1 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion Time of Condition A not met. AND OR B.2 Be in MODE 5. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months Pressure boundary LEAKAGE exists.

OR Primary to secondary LEAKAGE not within limit.

COMANCHE PEAK - UNITS 1 AND 2 3.4-33 Amendment No. 74

TXX-05182 Attachment 2 Page 5 of 24 RCS Operational LEAKAGE 3.4.13 SURVEILLANCE REQUIREMENTS COMANCHE PEAK - UNITS 1 AND 2 3.4-34 Amendment No. 64

TXX-05182 Attachment 2 Page 6 of 24 SG Tube Integrity 3.4.17 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.17 Steam Generator (SG) Tube Integrity LCO 3.4.17 SG tube integrity shall be maintained.

AND All SG tubes satisfying the tube repair criteria shall be plugged or repaired in accordance with the Steam Generator Program.

APPLICABILITY: MODES 1,2,3, and 4 ACTIONS

. , flr I

l-- n---------------------------------------------------------

Separate Condition entry is allowed for each SG tube.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more SG tubes A.1 Verify tube integrity of the 7 days satisfying the tube repair , affected tube(s) is criteria and not plugged or maintained until the next repaired in accordance with : refueling outage or SG the Steam Generator tube inspection.

Program.

AND A.2 Plug or repair the affected Prior to entering tube(s) in accordance with MODE 4 following the the Steam Generator next refueling outage Program. or SG tube inspection B. Required Action and B.1 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion Time X of Condition A not met. AND OR B.2 Be in MODE 5. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months SG tube integrity not maintained.

COMANCHE PEAK - UNITS I AND 2 3.4-48 Amendment No.

11 NEW PAGE 3.4.48

TXX-05182 Attachment 2 Page 7 of 24 SG Tube Integrity 3.4.17 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.17.1 Verify SG tube integrity in accordance with the Steam In accordance with Generator Program. the Steam Generator Program SR 3.4.17.2 Verify that each inspected SG tube that satisfies the Prior to entering tube repair criteria is plugged or repaired in MODE 4 following a accordance with the Steam Generator Program. SG tube inspection COMANCHE PEAK- UNITS 1 AND 2 3.449 Amendment No.

NEW PAGE 3.4.49

TXX-05182 Attachment 2 Page 8 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.9 Steam Generator (SG) Tube Survoillanco Program Each steam generator shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program.

The provisions of SR 3.0.2 are applicable to the SG Surveillance Program test frequencies.

a. Steam Generator Sample Selection and Inspection - Each steam generator shall be determined OPERABLE during shutdown by selecting and inspecting at least the minimum number of steam generators specified in Table 5.5-1. paired

b. Steam Generator Tube Sample Selection and Inspection - The am generator tube minimum sample size, inspection result clas cation, and the corresponding action required shall be as specifie able 5.5-2 or 5.5-3. Table 5.5-2 applies to all tubes except feapawed tubes (Unit 1 83 only) which are covered by Table 5.5-3. The inservice inspection of steam generator tubes shall be performed at the frequencies specified in Specification 5.5.9d the inspected tubes shall be verified acceptable I 71 per the acceptance criteria ecification 5.5. .The tubes selected for each inservice inspection per Table .2hall inclu least 3% of all ld the expanded tubes and at least 3% of the re f tubes in all steam generators; the tubes selected for these inspe s be selected on a random basis except:

1. Where experience in similar plants with similar water chemistry indicates critical areas to be inspected, then at least 50% of the EL tubes inspected shall be from these critical areas;

2. The first sample of tubes selected for each inservice inspection (subsequent to the preservice inspection) of each steam generator shall include:

a) All nonplugged tubes that previously had detectable wall penetrations (greater than 20%),

b) Tubes in those areas where experience has indicated potential problems, and (continued)

I 15.5.9.1 Unit I model D4 Steam Generator (SG) Program COMANCHE PEAK - UNITS 1 AND 2 5.0-1 3 Amendment No. 93

TXX)-051 82 Attachment 2 Page 9 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9 Steam Generator (SG) Tube Sur'eillance 9rocwam (continued) c) A tube inspection (pursuant to Specification 5.5.9e.1 h) I 71 shall be performed on each selected tube. If any selected tube does not permit the passage of the eddy current probe for a tube inspection, this shall be recorded and an adjacent tube shall be selected and subjected to a tube inspection.

d) Indications left in service as a result of the application of 70 the tube support plate voltage repair criteria shall be inspected by bobbin probe during all future refueling outages.

3. The tubes selected as the second and third samples (if required by Table 5.5.9-2 during each inservice inspection may be subjected to a partial tube inspection provided:

a) The tubes selected for these samples include the tubes from those areas of the tube sheet array where tubes with imperfections were previously found, and b) The inspections include those portions of the tubes where imperfections were previously found.

4. Implementation of the steam generator tube/tube support plate 70 repair criteria requires a 100% bobbin coil inspection for hot-leg and cold-leg tube support plate intersections down to the lowest cold-leg support with known outside diameter stress corrosion cracking (ODSCC) indications. The Determination of the lowest cold leg tube support plate intersections having ODSCC indications shall be based on the performance of at least a 20%

random sampling of the tubes inspected over their full length.

The results of each sample inspection shall be classified into one of the following three categories:

Category Inspection Results C-1 Less than 5% of the total tubes inspected are degraded tubes and none of the inspected tubes are defective.

5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued) (continued)

COMANCHE PEAK - UNITS I AND 2 5.0-14 Amendment No. 74

TXX-05182 Attachment 2 Page 10 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9 Steam Generator (SG) Tube Surveillance Program (continued)

C-2 One or more tubes, but not more than 1% of the total tubes inspected are defective, or between 5% and 10% of the total tubes inspected are degraded tubes.

C-3 More than 10% of the total tubes inspected are degraded tubes or more than 1% of the inspected tubes are defective.

Note: In all inspections, previously degraded tubes must exhibit significant (greater than 10%) further wall penetrations to be included in the above percentage calculations.

c. Steam Generator F* Tube Inspection (Unit 1 only) - In addition to the 71 minimum sample size as determined by Specification 5.5.9 b., all F* tubes will be inspected within the tubesheet region. The results o the inspections of F* tubes identified in previous inspections will ot be a cause for additional inspections per Tables 5.5-1 and 5.5-2.

d. InsDection Frequencies - The above required inservice inspecti ns of l 71 steam generator tubes shall be performed at the following frequ ncies:

1. The first inservice inspection shall be performed after 6 E ctive Full Power Months (EFPM) and before 12 EFPM and shall clude a special inspection of all expanded tubes in all steam gene tors.

Subsequent inservice inspections shall be performed at inte' als of not less than 12 nor more than 24 calendar months after th previous inspection. If two consecutive inspections, not includ g the preservice inspection, result in all inspection results falling i to the C-1 category or if two consecutive inspections demonstrate that previously observed degradation has not continued and no additional degradation has occurred, the inspection interval may be extended to a maximum of once per 40 months;

2. If the results of the inservice inspection of a steam gener conducted in accordance with Table 5.5-2 at 40-in tervals fall in Category C-3, the inspection frequen all be increased to at least once per 20 months. The i se in inspection frequency shall apply until th sequent inspections satisfy the criteria of Specification 5.5.9d.1; the interval may then be 71 extended to a maximum of once per 40 months; and (continued) 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued)

COMANCHE PEAK - UNITS I AND 2 5.0-1 5 Amendment No. -74

TXX-05182 Attachment 2 Page 11 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9 Steam Generator (SG) Tube Surveillance Program (continued)

3. Additional, unscheduled inservice inspections shall be performed on each steam generator in accordance with the first sample inspection specified in Table 5.5-2 during the shutdown subsequent to any of the following conditions:

a) Primary-to secondary tube leaks (not including leaks originating from tube-to-tube sheet welds) in excess of the limits of Specification 3.4.5 b) A seismic occurrence greater than the Operating Basis Earthquake, or c) A loss-of-coolant accident requiring actuation of the Engineered Safety Features, or d) A main steam line or feedwater line break.

e. Acceptance Criteria 71

1. As used in this specification:

a) Imperfection means an exception to the dimensions, finish, or contour of a tube from that required by fabrication drawings or specifications. Eddy-current testing indications below 20% of the nominal tube wall thickness, if detectable, may be considered as imperfections; b) Degradation means a service-induced cracking, wastage, wear, or general corrosion occurring on either inside or outside of a tube; c) Dearaded Tube means a tube containing imperfections greater than or equal to 20% of the nominal wall thickness caused by degradation; d) % Degradation means the percentage of the tube wall thickness affected or removed by degradation; e) Defect means an imperfection of such severity that it exceeds the plugging limit or (for Unit I only) repair limit. A tube j 83 containing a defect is defective; (continued) 5.5.9.1 Unit I model D4 Steam Generator (SG) Pro-gram (continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-1 5a Amendment No. 83

TXX-051C2 Attachment 2 Page 12 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9 Steam Generator (SG) Tube S ue Peti f) Plugging or Repair Limit means the imperfection depth at or beyond which the tube shall be removed from service by plugging 83 or (for Unit 1 only) repaired by sleeving and is equal to 40% of the wall thickness. The plugging limit for laser welded sleeves is equal to 43% of the nominal wall thickness. The plugging limit for Leak Tight sleeves is equal to 20% of the nominal wall thickness. This I definition does not apply to that portion of the Unit 1 tubing that 101 meets the definition of an F* tube. This definition does not apply to 71 tube support plate intersections for which the voltage-based plugging criteria are being applied. Refer to 5.5.9 1m)for the 70 repair limit applicable to these intersections. All tube epaired with Leak Limiting sleeves shall be plugged upon detection o degradation in the sleeve and/or pressure boundary portion the original tube wall in the sleeve/tube assembly (i.e., the sleeve- 112 tube joint) regardless of depth. The F* criteria is not applicable to the parent tube located behind the Leak Limiting sleeves installed in the tubesheet transition zone; g) Unserviceable describes the condition of a tub s or contains a defect large enough to affec ctural integrity in the event of an Operating Basis E e, a loss-of-coolant accident, or a steam eedwater line break as specified in Specification 5.5.9d. , above; 71 h) Tube Inspection means an inspection of the steam generator tube from the tube end (hot leg side) completely around the U-bend to the top support of the cold leg. For a tube repaired by sleeving (for I 83 Unit 1 only) the tube inspection shall include the sleeved portion of the tube; i) Preservice Inspection means an inspection of the full length of each tube in each steam generator performed by eddy current techniques prior to service to establish a baseline condition of the tubing. This inspection shall be performed prior to initial POWER OPERATION using the equipment and techniques expected to be used during subsequent inservice inspections; I 71 j) F* Distance (Unit 1 only) is the distance of the hardroll expanded 71 portion of a tube which provides a sufficient length of non-degraded tube expansion to resist pullout of the tube from the tubesheet.

The F* distance is equal to 1.13 inches, plus an allowance for eddy current measurement uncertainty, and is measured down from the top of the tubesheet, or the bottom of the roll transition, whichever is lower in elevation. The F*criteria is not applicable to the parent tube located behind the Leak Limiting sleeves installed in the 112 tubesheet transition zone; k) F* Tube (Unit 1 only) is that portion of the tubing in the area of the 71 tubesheet region below the F* distance with a) degradation below the F* distance equal to or greater than 40%, b)which has no indication of degradation within the F* distance, and c) that remains inservice; (continued) 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-16 Amendment No. 412

TXX-05182 Attachment 2 Page 13 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9 Steam Generator (SG) Tube Surer;llaRea Progr-am (coRtirued)

I) Hard Roll ExDansion (Unit 1 only) is that portion of a tube 71 which has been increased in diameter by a rolling process such that no crevice exists between the outside diameter of the tube and the hole in the tubesheet; and m) For Unit 1 only. the Tube Support Plate Plugging Limit is used 70 for the disposition of alloy 600 steam generator tubes for continued service that are experiencing predominantly axially oriented outside diameter stress corrosion cracking confined within the thickness of the tube support plates and flow distribution baffle (FDB). At tube support plate intersections (and FDB), the plugging limit is based on maintaining steam generator tube serviceability as described below:

1. Steam generator tubes, whose degradation is attributed to 70 outside diameter stress corrosion cracking within the bounds of the tube support plate with bobbin voltages less than or equal to the lower voltage repair limit (1.0 volt), will be allowed to remain in service.

2. Steam generator tubes, whose degradation is a ted to outside diameter stress corrosion cracking in the bounds of the tube support plate with eobbin voltage greater than the lower voltage re imit (1.0 volt), will be 71 repaired, except as noted in 5.5.9e.1 m)3. below.

3. Steam generator tubes with indications of potential 70 degradation attributed to outside diameter stress corrosion cracking within the bounds of the tube support plate with a bobbin voltage greater than the lower voltage repair limit (1.0 volt) but less than or equal to the upper voltage repair limit*, may remain inservice if a rotating pancake coil inspection does not detect degradation. Steam generator tubes, with indications of outside diameter stress corrosion cracking degradation with a bobbin voltage greater than the upper repair limit** will be plugged or repaired.

e 9.1 Unit I model D4 Steam Generator (SG) Program (continued) (continued)

The upper voltage repair limit is calculated according to the methodology in GL 95-05 as supplemented. 70

- VURL will differ at the TSPs and flow distribution baffle.

COMANCHE PEAK - UNITS 1 AND 2 5.0-1 6a Amendment No. -7

TXX-05182 Attachment 2 Page 14 of 24 Programs and Manuals l 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued) ! 1l5.5 5.5 Programs and Manuals

\5.5.9 Stoem Genor atei- (SG) Tube Si linveillaRGe PF49qFam (GGntiRued)

4. Certain intersections as identified in WPT-15949 will be 70 excluded from application of the voltage-based repair criteria as it is determined that these intersections may collapse or deform following a postulated LOCA + S event.

F.1

5. If an unscheduled mid-cy orfor med, e following mid-cy ar limits y instead of th imits 71 identified in 5.5.9e.1.m)1., 5.5.9e.1.m)2., and 5.5.9e.1.m)3. 70 The midcycle repair limits are determined from the following equations:

VSL VMURL 1.0 + NDE + GCL.At CL)

VtI 4 RL = V -(VURL - LRL)[CL At]

where:

VURL = upper voltage repair limit VLRL = lower voltage repair limit VMURL = mid-cycle upper voltage limit based on time into cycle VMLRL = mid-cycle lower voltage repair limit based on VMLRL and time into cycle At = length of time since last scheduled inspection during which VURL and VLRL were implemented CL = cycle length (the time between two scheduled steam generator inspections)

VSL = structural limit voltage Gr = average growth per cycle NDE = 95-percent cumulative probability allowance for nondestructive examination uncertainty (i.e., a value of 20-percent has been appro the NRC) B Implementation o m id-c p its should 71 folloeappro n TS 5.5.9e.1.m)1.,

5.5.9e.1m)2., and 5.5.9e.1.m)3.

n. Tube Repair (for Unit 1 only) refers to the process that 83 establishes tube serviceability. Acceptable tube repairs will be performed in accordance with the process described in Westinghouse WCAP-13698, Rev. 3 and Westinghouse Letter WPT-16094 dated March 20, 2000, WCAP-15090, Rev. 1, 112 CEN-630-P, Rev. 2 dated June 1997, and WCAP-15918, Rev.

1, dated January, 2004.

(continued)

COMANCHE PEAK - UNITS I AND 2 5.0-17 Amendment No. 442

TXX-05182 Attachment 2 Page 15 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9 Steam Generator (SG) Tube Surveillance Proiram-(continued)

2. The steam generator shall be determined OPERABLE after completing the corresponding actions (plug all tubes exceeding the plugging limit and all tubes containing through-wall cracks) required by Table 5.5-2 and Table 5.5-3. I 101 (continued) 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Prowram (continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-1 7a Amendment No. 404

TXX-05182 Attachment 2 Page 16 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9. Steam Genorator (SG) Tube Surveillance Program (contided)

TABLE 5.5-1 MINIMUM NUMBER OF STEAM GENERATORS TO BE INSPECTED DURING INSERVICE INSPECTION

-- I Preservice Inspection Four No. of Steam Generators per Unit Four First Inservice Inspection Two Second & Subsequent Inservice Inspections One' TABLE NOTATIONS I. The two steam generators that were not inspected during the first inservice inspection shall be inspected during the second and third inspections, one in each inspection period. For the fourth and subsequent inspections, the inservice inspection may be limited to one steam generator on a rotating schedule encompassing 12% of the tubes if the results of the previous inspections of the four steam generators indicate that all steam generators are performing in a like manner. Note that under some circumstances, the operating conditions in one or more steam generators may be found to be more severe than those in other steam generators. Under such circumstances the sample sequence shall be modified to inspect the most severe conditions.

-I (continued)

-- 1 5.5.9.1 Unit I model D4 Steam Generator (SG) Program (continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-18 Amendment No. 64

TXX-05182 Attachment 2 Paae 17 of 24 Programs and Manuals 5.5 Steam "enRea!E)F (0C i,-UDO ,-uRa:iR~ e PEFEIraM tCUEltRUHU)~

STEAM GENERATOR TUBE INSPECTION 1 ST SAMPLE 2 ND SAMPLE 3 RD SAMPLE INSPECTION INSPECTION INSPECTION Sample Result Action Result Action Result Action sieRequired Required Required A C-1 None N.A. N.A. N.A. N.A.

4 I I minimum of C-2 Plug or repair* C-1 None N.A. N.A. 83 S Tubes defective tubes per S.G. and inspect C-2 Plug or repair* C-1I None additional 2S defective tubes tubes in this S.G. and inspect C-2 Plug or repair*

additional 4S defective tubes tubes in this S.G.

C-3 Perform action for C-3 result of first sample C-3 Perform action for N.A. N.A.

C-3 result of first sample 4 I 1 4 4 C-3 Inspect all tubes All other None N.A. N.A.

in this S.G., plug S.G.s are 83 or repair* C-1 defective tubes and inspect 2S Some Perform action for N.A. N.A.

tubes in each S.G.s C-2 C-2 result of other S.G. but no second sample additional 103 S.G. C-3 Additional Inspect all tubes N.A. NA.

S.G. is in each S.G. and 83 C-3 plug or repair*

defective tubes.

103 I ___________________________________

I _____________________

_____________________ I .L

____________________ .L ____________________

(continued)

S = 12/n% Where n is the number of steam generators inspected during an inspection 1 83

for Unit 1 only COMANCHE PEAK - UNITS 1 AND 2 5.0-1 9 Amendment No. 4W

TXX-05182 Attachment 2 Page 18 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.0 Steam Generator (SG) Tubc Surveillance Proaram (continued) 83 TABLE 5.5-3 STEAM GENERATOR REPAIRED TUBE INSPECTION FOR UNIT 1 ONLY 1 ST SAMPLE INSPECTION 2ND SAMPLE INSPECTION Sample Size Result Action Required Result Action Required A minimum C-1 None N.A. N.A.

of 20% of repaired tubes (1)

C-2 Plug defective repaired C-1 None tubes and inspect 100%

of the repaired tubes in this S.G .__ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

C-2 Plug defective repaired tubes C-3 Perform action for C-3 result of first sample C-3 Inspect all repaired All other None tubes in this S.G., plug S.G.s are defective tubes and C-1 inspect 20% of the Same Perform action for C-2 result of repaired tubes in each S.G.s C-2 first sample other S.G. but no additional 103 S.G. are C-3 Additional Inspect all repaired tubes in 83 S.G is C-3 each S.G. and plug defective tubes.

103 (continued) 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Proaram (continued) I (1) Each repair method is considered a separate population for determinatie on of initial inservice inspection and scope expansion.

INSERT new section 5.5.9.2 on the next page COMANCHE PEAK - UNITS 1 AND 2 5.0-1 9a Amendment No. 403

TXX-05182 Attachment 2 Page 19 of 24 5.5.9.2 Unit 1 model D76 and Unit 2 model D5 Steam Generator (SG) Program A Steam Generator Program shall be established and implemented to ensure that SG tube integrity is maintained. In addition, the Steam Generator Program shall include the following provisions:

a. Provisions for condition monitoring assessments. Condition monitoring assessment means an evaluation of the 'as found" condition of the tubing with respect to the performance criteria for structural integrity and accident induced leakage. The "as found" condition refers to the condition of the tubing during an SG inspection outage, as determined from the inservice inspection results or by other means, prior to the plugging of tubes.

Condition monitoring assessments shall be conducted during each outage during which the SG tubes are inspected or plugged to confirm that the performance criteria are being met.

b. Performance criteria for SG tube integrity. SG tube integrity shall be maintained by meeting the performance criteria for tube structural integrity, accident induced leakage, and operational LEAKAGE.

1. Structura! integrity performance criterion: All in-service steam generator tubes shall retain structural integrity over the full range of normal operating conditions (including startup, operation in the power range, hot standby, and cool down and all anticipated transients included in the design specification) and design basis accidents. This includes retaining a safety factor of 3.0 against burst under normal steady state full power operation primary-to-secondary pressure differential and a safety factor of 1.4 against burst applied to the design basis accident primary-to-secondary pressure differentials. Apart from the above requirements, additional loading conditions associated with the design basis accidents, or combination of accidents in accordance with the design and licensing basis, shad also be evaluated to determine if the associated loads contribute significantly to burst or collapse. In the assessment of tube integrity, those loads that do significantly affect burst or collapse shall be determined and assessed in combination with the loads due to pressure with a safety factor of 1.2 on the combined primary loads and 1.0 on axial secondary loads.

2. Accident induced leakage performance criterion: The primary to secondary accident induced leakage rate for any design basis accident, other than a SG tube rupture, shall not exceed the leakage rate assumed in the accident analysis in terms of total leakage rate for all SGs and leakage rate for an individual SG . Leakage is not to exceed 1 gpm per SG.

3. The operational LEAKAGE performance criterion is specified in LCO 3.4.13, 'RCS Operational LEAKAGE."

(continued)

INSERT 5.5.9.2 Page 1 of 3

TXX-05182 Attachment 2 Page 20 of 24 5.5.9.2 Unit 1 model D76 and Unit 2 model D5 Steam Generator (SG) Program (continued)

c. Provisions for SG tube repair criteria. Tubes found by inservice inspection to contain flaws with a depth equal to or exceeding 40% of the nominal tube wall thickness shall be plugged.

d. Provisions for SG tube inspections. Periodic SG tube inspections shall be performed. The number and portions of the tubes inspected and methods of inspection shall be performed with the objective of detecting flaws of any type (e.g., volumetric flaws, axial and circumferential cracks) that may be present along the length of the tube, from the tube-to-tubesheet weld at the tube inlet to the tube-to-tubesheet weld at the tube outlet, and that may satisfy the applicable tube repair criteria. The tube-to-tubesheet weld is not part of the tube. In addition to meeting the requirements of d.1, d.2, and d.3 below, the inspection scope, inspection methods, and inspection intervals shall be such as to ensure tnat SG tube integrity is maintained until the next SG inspection. An assessment of degradation shall be performed to determine the type and location of flaws to which the tubes may be susceptible and, based on this assessment, to determine which inspection methods need to be employed and at what locations.

1. Inspect 100% of the tubes in each SG during the first refueling outage following SG replacement.

2a. For the Unit 2 model D5 steam generators (Alloy 600 thermally treated) inspect 100% of the tubes at sequential periods of 120, 90, and, thereafter, 60 effective full power months. The first sequential period shall be considered to begin after the first inservice inspection of the SGs. In addition, inspect 50% of the tubes by the refueling outage nearest th3 midpoint of the period and the remaining 50% by the refueling outage nearest the end of the period. No SG shall operate for more than 48 effective full power months or two refueling outages (whichever is less) without being inspected.]

2b. For the Unit I model Delta-76 steam generators (Alloy 690 thermally treated) inspect 100% of the tubes at sequential periods of 144, 108, 72, and, thereafter, 60 effective full power months.

The first sequential period shall be considered to begin after the first inservice inspection of the SGs. In addition, inspect 50% of the tubes by the refueling outage nearest the midpoint of the period and the remaining 50% by the refueling outage nearest the end of the period. No SG shall operate for more than 72 effective full power months or three refueling outages (whichever is less) without being inspected.

(continued)

INSERT 5.5.9.2 Page 2of 3

TXX-05182 Attachment 2 Page 21 of 24 5.5.9.2 Unit 1 model D76 and Unit 2 model D5 Steam Generator (SG) Program (continued)

3. If crack indications are found in any SG tube, then the next inspection for each SG for the degradation mechanism that caused the crack indication shall not exceed 24 effective full power months or one refueling outage (whichever is less). If definitive information, such as from examination of a pulled tube, diagnostic non-destructive testing, or engineering evaluation indicates that a crack-like indication is not associated with a crack(s), then the indication need not be treated as a crack.

e. Provisions for monitoring operational primary to secondary LEAKAGE.

INSERT 5.5.9.2 Page 3of 3

TXX-05182 Attachment 2 Page 22 of 24 Programs and Manuals 5.6 5.6 Reporting Requirements (continued) 5.6.7 Not used 5.6.8 PAM Report When a report is required by the required actions of LCO 3.3.3, "Post Accident Monitoring (PAM) Instrumentation," a report shall be submitted within the following 14 days. The report shall outline the preplanned alternate method of monitoring, the cause of the inoperability, and the plans and schedule for restoring the instrumentation channels of the Function to OPERABLE status.

5.6.9 No1ised INSERT 5.6.9 5.6.10 Sta Ge elatnnn TubeI,..In6enniR~ Renda

a. Within 15 days following the completion of each inservice inspection of steam generator tubes, the number of tubes plugged, repaired or 83 designated as an F* tube in each steam generator shall be reported to the Commission;

b. The complete results of the steam generator tube inservice inspection shall be submitted to the Commission in a report within 12 months following the completion of the inspection. This report shall include:

1) Number and extent of tubes and (for Unit 1 only) sleeves inspected, 1 83

2) Location and percent of wall-thickness penetration for each indication of an imperfection, and

3) Identification of tubes plugged or repaired. 1 83

c. Results of steam generator tube inspections which fall into Category C-3 shall be reported to the Commission in a report within 30 days and prior 1 103 to resumption of plant operation. This report shall provide a description of investigations conducted to determine cause of the tube degradation and corrective measures taken to prevent recurrence.

(continued)

Unit 1 model D4 Steam Generator Tube Inspection Report I COMANCHE PEAK - UNITS 1AND 2 5.0-36 Amendment No. 103

TXX-051 82 Attachment 2 Page 23 of 24 Reporting Requirements 5.6 5.6 Reporting Requirements (continued) 5.6.10 Stea Geeaa Tuben I m~e

.,nlR. m Repo# (GO1. u

d. For implementation of the voltage based repair criteria to tube support 70 plate intersections, notify the staff prior to returning the steam generators to service should any of the following conditions arise:

1. If estimated leakage based on the projected end-of-cycle (or if not practical, using the actual measured end-of-cycle) voltage distribution exceeds the leakage limit (determined from the licensing basis dose calculation for the postulated main steam line break) for the next operating cycle.

2. If circumferential crack-like indications are detected at the tube support plate intersections.

3. If indications are identified that extend beyond the confines of the tube support plate.

4. If indications are identified at the tube support plate elevations that are attributable to primary water stress corrosion cracking.

5. If the calculated conditional burst probability based on the projected end-of-cycle (or if not practical, using the actual measured end-of-cycle) voltage distribution exceeds 1 x 10-2, notify the NRC and provide an assessment of the safety significance of the occurrence.

i I

l Unit I model D4 Steam Generator Tube Inspection Report (continued) I COMANCHE PEAK- UNITS 1 AND 2 5.0-36a Amendment No. 493

TXX-05182 Attachment 2 Page 24 of 24 5.6.9 Unit 1 model D76 and Unit 2 model D5 Steam Generator Tube Inspection Report A report shall be submitted within 180 days after the initial entry into MODE 4 following completion of an inspection performed in accordance with the Specification 5.5.9.2, Steam Generator (SG) Program. The report shall include:

a. The scope of inspections performed on each SG,

b. Active degradation mechanisms found,

c. Nondestructive examination techniques utilized for each degradation mechanism,

d. Location, orientation (if linear), and measured sizes (if available) of service induced indications,

e. Number of tubes plugged [or repaired] during the inspection outage for each active degradation mechanism,

f. Total number and percentage of tubes plugged to date, and

9. The results of condition monitoring, including the results of tube pulls and in-situ testing, Insert 5.6.9

ATTACHMENT 3 to TXX-05182 PROPOSED TECHNICAL SPECIFICATIONS BASES CHANGES Pages B ii B 3.4-21 B 3.4-25 B 3.4-31 B 3.4-36 B 3.4-80 B 3.4-81 B 3.4-82 B 3.4-83 B 3.4-84 B 3.4-85 B 3.4-107 (new page)

B 3.4-108 (new page)

B 3.4-109 (new page)

B 3.4-110 (new page)

B 3.4-111 (new page)

B 3.4-112 (new page)

TXX-05182 Attachment 3 Page 2 of 18 TABLE OF CONTENTS (continued)

B 3.4 REACTOR COOLANT SYSTEM (RCS) (continued)

B 3.4.6 RCS Loops C MODE 4 ................................................ B 3.4-29 B 3.4.7 RCS Loops C MODE 5, Loops Filled ................................................ B 3.4-34 B 3.4.8 RCS Loops C MODE 5, Loops Not Filled ................................................ B 3.4-40 B 3.4.9 Pressurizer ................................................ B 3.4-44 B 3.4.10 Pressurizer Safety Valves ................................................ B 3.4-49 B 3.4.11 Pressurizer Power Operated Relief Valves (PORVs) ..................................... B 3.4-54 B 3.4.12 Low Temperature Overpressure Protection (LTOP) System ......................... B 3.4-63 B 3.4.13 RCS Operational LEAKAGE ................................................ B 3.4-79 B 3.4.14 RCS Pressure Isolation Valve (PIV) Leakage ................................................ B 3.4-86 B 3.4.15 RCS Leakage Detection Instrumentation ................................................ B 3.4-93 B 3.4.16 RCS Specific Activity................................................ B 3.4-101 EMERGENCY CORE COOLING SYSTEMS (ECCS) ...................................... B 3.5-1 I

B3.5 B 3.5.1 Accumulators ................................................ B 3.5-1 B 3.5.2 ECCS C Operating ................................................ B 3.5-10 B 3.5.3 ECCS C Shutdown ................................................ B 3.5-23 B 3.5.4 Refueling Water Storage Tank (RWST) ................................................ B 3.5-28 B 3.5.5 Seal Injection Flow ................................................ B 3.5-36 B 3.6 CONTAINMENT SYSTEMS ................................................ B 3.6-1 B 3.6.1 Containment ................................................ B 3.6-1 B 3.6.2 Containment Air Locks ................................................ B 3.6-5 B 3.6.3 Containment Isolation Valves ................................................. B 3.6-13 B 3.6.4 Containment Pressure ................................................ B 3.6-31 B 3.6.5 Containment Air Temperature ................................................ B 3.6-34 B 3.6.6 Containment Spray System ................................................ B 3.6-38 B 3.6.7 Spray Additive System ................................................ B 3.6-46 B 3.6.8 Hydrogen Recombiners ................................................ B 3.6-52 B3.7 PLANT SYSTEMS ................................................ B 3.7-1 B 3.7.1 Main Steam Safety Valves (MSSVs) ................................................ B 3.7-1 B 3.7.2 Main Steam Isolation Valves (MSIVs) ................................................ B 3.7-9 B 3.7.3 Feedwater Isolation Valves (FIVs) and Associated Bypass Valves ................ B 3.7-15 B 3.7.4 Steam Generator Atmospheric Relief Valves (ARVs) ..................................... B 3.7-21 B 3.7.5 Auxiliary Feedwater (AFW) System ................................................ B 3.7-26 B 3.7.6 Condensate Storage Tank (CST) ................................................ B 3.7-35 B 3.7.7 Component Cooling Water (CCW) System ................................................ B 3.7-39 B 3.7.8 Station Service Water System (SSWS) ................................................ B 3.7-44 B 3.7.9 Ultimate Heat Sink (UHS) ................................................ B 3.7-50 (continued) l B 3.4.17 Steam Generator (SG) Tube Integrity ..................................... B.3.4-107 I COMANCHE PEAK - UNITS 1 AND 2 B ii NIA 64 Revision

TXX-05182 Attachment 3 Page 3 of 18 RCS Loops-MODES 1 and 2 B 3.4.4 BASES (continued)

LCO The purpose of this LCO is to require an adequate forced flow rate for core heat removal. Flow is represented by the number of RCPs in operation for removal of heat by the SGs. To meet safety analysis acceptance criteria for DNB, four pumps are required to be in operation at power.

An OPERABLE RCS loop consists of an OPERABLE RCP in operation providing forced flow for heat transport and an OPERABLE SG-if aGcordancc with the Staam Gcncrator Tubc Sur'cillance Program. An RCP I is OPERABLE if it is capable of being powered and is able to provide forced flow.

APPLICABILITY In MODES 1 and 2, the reactor is critical and thus has the potential to produce maximum THERMAL POWER. Thus, to ensure that the assumptions of the accident analyses remain valid, all RCS loops are required to be OPERABLE and in operation in these MODES to prevent DNB and core damage.

The decay heat production rate is much lower than the full power heat rate.

As such, the forced circulation flow and heat sink requirements are reduced for lower, noncritical MODES as indicated by the LCOs for MODES 3, 4, and 5.

Operation in other MODES is covered by:

LCO 3.4.5, "RCS Loops-MODE 3";

LCO 3.4.6, 'RCS Loops-MODE 4";

LCO 3.4.7, "RCS Loops - MODE 5, Loops Filled";

LCO 3.4.8, "RCS Loops-MODE 5, Loops Not Filled";

LCO 3.9.5, "Residual Heat Removal (RHR) and Coolant Circulation - High Water Level" (MODE 6); and LCO 3.9.6, 'Residual Heat Removal (RHR) and Coolant Circulation - Low Water Level" (MODE 6).

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-21 A.m.And_.m.ARt hip RWRevision

TXX-05182 Attachment 3 Page 4 of 18 RCS Loops - MODE 3 B 3.4.5 BASES LCO is validation of the pump coastdown curve used as input to a number of (continued) accident analyses including a loss of flow accident. This test is generally performed in MODE 3 during the initial startup testing program, and as such should only be performed once. If, however, changes are made to the RCS that would cause a change to the flow characteristics of the RCS, the input values of the coastdown curve must be revalidated by conducting the test again.

Utilization of the Note is permitted provided the following conditions are met, along with any other conditions imposed by test procedures:

a. No operations are permitted that would dilute the RCS boron concentration with coolant at boron concentrations less than required to assure the SDM of LCO 3.1.1, thereby maintaining the margin to criticality. Boron dilution with coolant at boron concentrations less than required to assure the SDM is maintained is prohibited because a uniform concentration distribution throughout the RCS cannot be ensured when in natural circulation; and

b. Core outlet temperature is maintained at least 100 F below saturation temperature, so that no vapor bubble may form and possibly cause a natural circulation flow obstruction.

An OPERABLE RCS loop consists of one OPERABLE RCP and one OPERABLE SG in 3c18%dance %ith theo Stoam Gonrr Tublo SuR9Aill;1Ano Pfegram,-which has the minimum water level specified in SR 3.4.5.2. An RCP is OPERABLE if it is capable of being powered and is able to provide forced flow if required.

APPLICABILITY In MODE 3, this LCO ensures forced circulation of the reactor coolant to remove decay heat from the core and to provide proper boron mixing. The most stringent condition of the LCO, that is, two RCS loops OPERABLE and two RCS loops in operation, applies to MODE 3 with Rod Control System capable of rod withdrawal. The least stringent condition, that is, two RCS loops OPERABLE and one RCS loop in operation, applies to MODE 3 with the Rod Control System not capable of rod withdrawal.

(continued)

COMANCHE PEAK- UNITS 1 AND 2 B 3.4-25 Revision 29

TXX-05182 Attachment 3 Page 5 of 18 RCS Loops- MODE 4 B 3.4.6 BASES LCO An OPERABLE RCS loop comprises an OPERABLE RCP and an (continued) OPERABLE SG in accordanco with the Stoam Gon orator Tub9 Surpcillaace Pregram,-which has the minimum water level specified in SR 3.4.6.2.

Similarly for the RHR System, an OPERABLE RHR loop comprises an OPERABLE RHR pump capable of providing forced flow to an OPERABLE RHR heat exchanger. RCPs and RHR pumps are OPERABLE if they are capable of being powered and are able to provide forced flow if required.

APPLICABILITY In MODE 4, this LCO ensures forced circulation of the reactor coolant to remove decay heat from the core and to provide proper boron mixing. One loop of either RCS or RHR provides sufficient circulation for these purposes.

However, two loops consisting of any combination of RCS and RHR loops are required to be OPERABLE to meet single failure considerations.

Operation in other MODES is covered by:

LCO 3.4.4, 'RCS Loops-MODES 1 and 2";

LCO 3.4.5, "RCS Loops-MODE 3";

LCO 3.4.7, NRCS Loops-MODE 5, Loops Filled";

LCO 3.4.8, ARCS Loops-MODE 5, Loops Not Filled";

LCO 3.9.5, 'Residual Heat Removal (RHR) and Coolant Circulation - High Water Level" (MODE 6); and LCO 3.9.6, "Residual Heat Removal (RHR) and Coolant Circulation - Low Water Level" (MODE 6).

ACTIONS A.1 and A.2 If one required loop is inoperable, redundancy for heat removal is lost.

Action must be initiated to restore a second RCS or RHR loop to OPERABLE status. The immediate Completion Time reflects the importance of maintaining the availability of two paths for heat removal.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-31 AMARd_.Mt9Rt No. 64 Revision

TXX-35182 Attachment 3 Page 6 of 18 RCS Loops-MODE 5, Loops Filled B 3.4.7 BASES LCO Utilization of Note 1 is permitted provided the following conditions are (continued) met, along with any other conditions imposed by test procedures:

a. No operations are permitted that would dilute the RCS boron concentration with coolant at boron concentrations less than required to assure the SDM of LCO 3.1.1, thereby maintaining the margin to criticality. Boron dilution with coolant at boron concentrations less than required to assure the SDM is maintained is prohibited because a uniform concentration distribution throughout the RCS cannot be ensured when in natural circulation; and

b. Core outlet temperature is maintained at least 10F below saturation temperature, so that no vapor bubble may form and possibly cause a natural circulation flow obstruction.

Note 2 allows one RHR loop to be inoperable for a period of up to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , provided that the other RHR loop is OPERABLE and in operation. This permits periodic surveillance tests to be performed on the inoperable loop during the only time when such testing is safe and possible.

Note 3 requires that the secondary side water temperature of each SG be

= 50'F above each of the RCS cold leg temperatures before the start of a reactor coolant pump (RCP) with an RCS cold leg temperature = 350F.

This restriction is to prevent a low temperature overpressure event due to a thermal transient when an RCP is started.

Note 4 provides for an orderly transition from MODE 5 to MODE 4 during a planned heatup by permitting removal of RHR loops from operation when at least one RCS loop is in operation. This Note provides for the transition to MODE 4 where an RCS loop is permitted to be in operation and replaces the RCS circulation function provided by the RHR loops.

RHR pumps are OPERABLE if they are capable of being powered and are able to provide flow if required. An OPERABLE SG can perform as a heat sink via natural circulation when it has an adequate water level and is OPERABLE in accordaincE with the Stoam Gonorator Tubo Survoillanca Pr(otam.nud (continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-36 Revision ;&8

TXX-05182 Attachment 3 Page 7 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

APPLICABLE This LCO deals with protection of the reactor coolant pressure boundary SAFETY (RCPB) from degradation and the core from inadequate cooling, in ANALYSES addition to preventing the accident analyses radiation release assumptions from being exceeded. The consequences of violating this LCO include the possibility of a loss of coolant accident (LOCA). Except for primary to secondary LEAKAGE, the safety analyses do not address operational LEAKAGE. However, other operational LEAKAGE is related to the safety analyses for LOCA; the amount of leakage can affect the probability of such an event. The safety analysis for an event resulting in steam discharge to the atmosphere assumes a 1 gpm primary to sorondanr LEAK-AGE as the initial Gendi4kmti Primary to secondary LEA 'isa factor in the dose releases outside containment resultin steam line break (SLB) accident. To a lesser extent, accidents or transients involve secondary steam release eatmosphere, such as a steam generator tube rupture

). The leakage contaminates the scondary fluid. safety analysis asssumption l The FSAR (Ref. 3) analysis for SGTR assumes the the s ary fluid i.3 released to the atmosphere via the atmospheric rel ves on the affected steam generator. This valve is assu to fail to close. The release continues until the reactor op rs close the associated block valve. The 1 gpm primary to secondary LEAKAGE is relatively inconsequential. i The safety analysis for the SLB accident assumes4-g m primary to secondary LEAKA.GE enerator as an initial condition. The dose consequenc ting from the SLB accident are within the limits def 0 CFR 100 (Ref. 6) as described in the accident analyses if e 3) is through the affected The safety analysis for RCS main loop piping for GDC-4 (Ref. 1) assumes 1 gpm unidentified leakage and monitoring per RG 1.45 (Ref. 2) are maintained (Ref. 4 and 5).

The RCS operational LEAKAGE satisfies Criterion 2 of 10CFR50.36(c)(2)(ii).

(continued) that primary to secondary LEAKAGE from all steam generators (SGs) is one gallon per minute or increases to one gallon per minute as a result of accident induced conditions. The LCO requirement to limit primary to secondary LEAKAGE through any one SG to less than or equal to 150 gallons per day is significantly less than the conditions assumed in the safety analysis.

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-80 Amendmei:it No. 64 Revision

TXX-05182 Attachment 3 Page 8 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

LCO RCS operational LEAKAGE shall be limited to:

a. Pressure Boundary LEAKAGE No pressure boundary LEAKAGE is allowed, being indicative of material deterioration. LEAKAGE of this type is unacceptable as the leak itself could cause further deterioration, resulting in higher LEAKAGE. Violation of this LCO could result in continued degradation of the RCPB. LEAKAGE past seals and gaskets is not pressure boundary LEAKAGE. Seals and gaskets include the canopy seals downstream of ACME threaded connections and Canopy Seal Clamp Assemblies. Therefore, leakage past the canopy seal or CSCAs is not pressure boundary leakage.

b. Unidentified LEAKAGE One gallon per minute (gpm) of unidentified LEAKAGE is allowed as a reasonable minimum detectable amount that the containment air monitoring and Containment Sump Level and Flow Monitoring System can detect within a reasonable time period. Violation of this LCO could result in continued degradation of the RCPB, if the LEAKAGE is from the pressure boundary.

c. Identified LEAKAGE Up to 10 gpm of identified LEAKAGE is considered allowable because LEAKAGE is from known sources that do not interfere with detection of unidentified LEAKAGE and is well within the capability of the RCS Makeup System. Identified LEAKAGE includes LEAKAGE to the containment from specifically known and located sources, but does not include pressure boundary LEAKAGE or controlled reactor coolant pump (RCP) seal leakoff (a normal function not considered LEAKAGE). Violation of this LCO could result in continued degradation of a component or system.

d. Primary to Secondaw LEAKAGE through All Steam Gerator6 (SGs) (Unri 2to ono Total primary to rseGondary LEAKAGE amounting to 1 qgpm through all SGC proedUce aconptablo offcsite dosce iRthe ac;GieF4 analysis. Violation of this LCO could exceed the ofite dos( ,imts for thi6 accident. PriFAra to secondary LEAKAGE must be in-lr.A- ;i th, #.-+I -I-I s h .,.,i f£r irAn;f.^i [=4A LAtI-2C (continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-81 Revision 24

TXX-05182 Attachment 3 Page 9 of 18 RCS Operational LEAKAGE B 3.4.13 BASES LCO e. Primarv to Secondar LEAKAGE through AnY One SG (continued)

For Unit 2, the 500 gallons por day limit oR one S iS based on the asrumption that a single crack leaking this amount would not propagate to undcr the stroes conditions of a LGA or a in steam linc rupture. If leaked through many cracks, thc cracks are vermnall, and the above assumption i6 Gonser.ative.

For Urit 1, marntairing anoperating leakage of 150 gpd pFr steam generator (0.1 gpm at room temperature) (600 gpd total) minimiezes the poteRtial for a large leaagoe event durRng a main steam line break. Based on the non dostructve examination UnRoetainties, bobbiR coil voltage distributioR anrd crak gmmth rate from the previous inspection, the expected leak rate following a steam line break is limited to below 27.70 gpm (calculated at room temperature cOnditiens) fForComanch Peak UInt I in the faulted loop. Maintaining leakage within the 27.79 gpm limit will eRsure that ofeite doses will remain within 10 CFR Part 100 guidelines and within control room dose (GDC 19) guidelines.

, eakage.to then in_^ 19P Wilb ..,a,, limnited to _a,A^_R rate eA I -5 gpd. If the projected end of cycle distribution of crack indications results in primar,' to seondary lea-kage greater than 27.7 in the faulted loop during a postulated steam line break event, additioRal4t)s mnustb removedromAserce in orde-r to redduce steam line break leakaGe to belew thiz-imit.

The leakage limits #teefpe ated-56. are- -more restrictive than the sta do g and antondod to provide an additioral margin to accommodate a G--ck which might grow at a greater than oxpected rate opF-uxpcted!y oxend outside the thikSnce of e lhotubosupport-plate.

HenGe, *thereduced leakage limit, wheR GGmb1Red WIt leak rate monitoring program, prov,'des addeitaRal -asUan^e that sheould4a 4 ig-.fu~

Ieak be experienced in scrvicc, it will be detected, and the plant Rishutdon ina timely m4a4nner APPLIC ILITY In MODES 1, 2, 3, and 4, the potential for RCPB LEAKAGE is greatest when the RCS is pressurized.

In MODES 5 and 6, LEAKAGE limits are not required because the reactor coolant pressure is far lower, resulting in lower stresses and reduced potentials for LEAKAGE.

(continued)

d. The limit of 150 gallons per day per SG is based on the operational LEAKAGE performance criterion in NEI 97-06, Steam Generator Program Guidelines (Ref.

7). The Steam Generator Program operational LEAKAGE performance criterion in NEI 97-06 states, 'The RCS operational primary to secondary leakage through any one SG shall be limited to 150 gallons per day." The limit is based on operating experience with SG tube degradation mechanisms that result in tube leakage. The operational leakage rate criterion in conjunction with the implementation of the Steam Generator Program is an effective measure for minimizing the frequency of steam generator tube ruptures.

COMANCHE PEAK - UNITS 1AND 2 B 3.4-82 Revision 6

TXX-05182 Attachment 3 Page 10 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

APPLICABILITY LCO 3.4.14, "RCS Pressure Isolation Valve (PIV) Leakage," measures (continued) leakage through each individual PIV and can impact this LCO. Of the two PIVs in series in each isolated line, leakage measured through one PIV does not result in RCS LEAKAGE when the other is leak tight. If both valves leak and result in a loss of mass from the RCS, the loss must be included in the allowable identified LEAKAGE.

ACTIONS A.1 Unidentified LEAKAGE, identified LEAKAGE, or primary to socondary IEAKAGF in excess of the LCO limits must be reduced to within limits within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . This Completion Time allows time to verify leakage rates and either identify unidentified LEAKAGE or reduce LEAKAGE to within limits before the reactor must be shut down. This action is necessary to prevent further deterioration of the RCPB.

B.1 and B.2 or primary to secondary LEAKAGE is not within limit, If any pressure boundary LEAKAGE exists- or if unidentified identified LEAKAGE,-er primary to secondary LEAKAGE cannot be reduced to within limits within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , the reactor must be brought to lower pressure conditions to reduce the severity of the LEAKAGE and its potential consequences. It should be noted that LEAKAGE past seals and gaskets is not pressure boundary LEAKAGE. The reactor must be brought to MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and MODE 5 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . This action reduces the LEAKAGE and also reduces the factors that tend to degrade the pressure boundary.

The allowed Completion Times are reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems.

In MODE 5, the pressure stresses acting on the RCPB are much lower, and further deterioration is much less likely.

(GG3t4""4 (continued COMANCHE PEAK - UNITS 1 AND 2 B 3.4-83 AFReRdment Ne. 64Revision

TXX-051 82 Attachment 3 Page 11 of 18 RCS Operational LEAKAGE B 3.4.13 This surveillance is modified by two Notes.

BASES (continued) I SURVEILLANCE SR 3.4.13.1 1 states REQUIREMENTS Verifying RCS LEAKAGE t be within t LCO limits ensures the integrity of the RCPB is maintaine. Pressure boundary LEAKAGE would at first appear as unidentified L KAGE and n only be positively identified by inspection. It should be oted that L GE past seals and gaskets is not pressure boundary KAGE. Uni entified LEAKAGE and identified LEAKAGE are determi d by performa ce of an RCS water inventory baane. Pl uti~ter) We - sor }n .u___._..

d e porfornnc fmanRCe - ------ inenoac 4n conPjunction with and foodwator systems.

The RCS water inventory balance mu be met with the reactor at steady state operating conditions (stable tem rature, power level, pressurizer and makeup tank lovels, makeup and etdown, and RCP seal injection and return flows). Uhrefoe, a Note dded allowing that this SR is not required to be performed until 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months after establishing steady state operation near operating pressure. The 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months allowance provides sufficient time to collect and process necessary data after stable plant conditions are established.

Steady state operation is required to perform a proper inventory balance since calculations during maneuvering are not useful. For RCS operational LEAKAGE determination by water inventory balance, steady state is defined as stable RCS pressure, temperature (Tvg changing by less than 50 F/hour), power level, pressurizer and makeup tank levels, makeup and letdown, and RCP seal injection and return flows. An early warning of pressure boundary LEAKAGE or unidentified LEAKAGE is provided by the automatic systems that monitor the containment atmosphere radioactivity and the containment sump level. It should be noted that LEAKAGE past seals and gaskets is not pressure boundary LEAKAGE. These leakage detection systems are specified in LCO 3.4.15, "RCS Leakage Detection Instrumentation."

The 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months Frequency is a reasonable interval to trend LEAKAGE and recognizes the importance of early leakage detection in the prevention of accidents. When non steady state operation precludes surveillance performance, the surveillance should be performed in a reasonable time period commensurate with the surveillance performance length, once steady state operation has been achieved, provided greater than 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months have elapsed since the last performance.

r a(continued)

Note 2 states that this SR is not applicable to primary to secondary LEAKAGE because LEAKAGE of 150 gallons per day cannot be measured accurately by an RCS water inventory balance.

COMANCHE PEAK - UNITS 1 AND 2 B 3.4844 Septembeit 30, 199ORevision

TXX-05182 Attachment 3 Page 12 of 18 RCS Operational LEAKAGE B 3.4.13 BASES SUVEILLANCE SR 3.4.13.2 REQUIREMENTS (continued) This SR pro-vides the means nocessary to determine SG OPERA'BILITY in an operational MODE. Tho requirement to demonstrate SG tube intriteg in cordanRe with the Steam Generator Tubo Surveillance Program emphasizes the impo'ance of SG tube integrity, even though this Surveillance cannot be pcrformcd at normal operating conditions.

This surveillance does not tie directly to any of the Icalage criteria in the

[LCO or of the CONDITIONS; theroforo failure to meet this surveillanco is considered failure to mcot the intey geals of the [CO and [CO 3.0.3

/ pl L~e REFERENCE 1. 10 CFR 50, Appendix A, GDC 4 and 30.

2. Regulatory Guide 1.45, May 1973.

3. FSAR, Section 15.

4. FSAR, Section 3.6B.

5. NUREG-1061, Volume 3, November 1984.

6. 10 CFR 100.

I NEI 97-06, 'Steam Generator Program Guidelines".

EPRI, 'Pressurized Water Reactor Primary-to-Secondary Leak

/

This SR verifies that primary to secondary LEAKAGE is less than or equal to 150 gallons per day through any one SG. Satisfying the primarl to secondary LEAKAGE limit ensures that the operational LEAKAGE performance criterion in the Steam Generator Program is met. If this SR is not met, the performance criterion is not met and LCO 3.4.17, "Steam Generator Tube Integrity,"

should be entered. The 150 gallons per d&y limit is measured at room temperature as described in Reference 8. The operational LEAKAGE rate limit applies to LEAKAGE through any one SG. If it is not practical to assign the LEAKAGE to an individual SG, all the primary to secondary LEAKAGE should be conservatively assumed to be from one SG.

The Surveillance is modified by a Note which states that the Surveillance is not required to be performed until 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months after establishment of steady state operation. For RCS primary to secondary LEAKAGE determination, steady state is defined as stable RCS pressure, temperature (Tag changing by less than 50F/hour), power level, pressurizer and makeup tank levels, makeup and letdown, and RCP seal injection and return flows.

The Surveillance Frequency of 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months is a reasonable interval to trend primary to secondary LEAKAGE and recognizes the importance of early leakage detection in the prevention of accidents.

The primary to secondary LEAKAGE is determined using continuous process radiation monitors or radiochemical grab sampling in accordance with the EPRI guidelines (Ref. 8).

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-85 Amendment No. 64Revision

TXX-05182 Attachment 3 Page 13 of 18 SG Tube Integrity B 3.4.17 B 3.4 REACTOR COOLANT SYSTEM (RCS)

B 3.4.17 SG Tube Integrity BASES BACKGROUND Steam generator (SG) tubes are small diameter, thin walled tubes that carry primary coolant through the primary to secondary heat exchangers. The SG tubes have a number of important safety functions. Steam generator tubes are an integral part of the reactor coolant pressure boundary (RCPB) and, as such, are relied on to maintain the primary system's pressure and inventory. The SG tubes isolate the radioactive fission products in the primary coolant from the secondary system. In addition, as part of the RCPB, the SC tubes are unique in that they act as the heat transfer surface between the primary and secondary systems to remove heat from the primary system. This Specification addresses only the RCPB integrity function of the SG. The SG heat removal function is addressed by LCO 3.4.4, "RCS Loops - MODES 1 and 2," LCO 3.4.5, "RCS Loops - MODE 3,"

LCO 3.4.6, "RCS Loops - MODE 4," and LCO 3.4.7, 'RCS Loops - MODE 5, Loops Filled."

SG tube integrity means that the tubes are capable of performing their intended RCPB safety function consistent with the licensing basis, including applicable regulatory requirements.

Steam generator tubing is subject to a variety of degradation mechanisms.

Steam generator tubes may experience tube degradation related to corrosion phenomena, such as wastage, pitting, intergranular attack, and stress corrosion cracking, along with other mechanically induced phenomena such as denting and wear. These degradation mechanisms can impair tube integrity if they are not managed effectively. The SG performance criteria are used to manage SG tube degradation.

Specification 5.5.9, 'Steam Generator (SG) Program," requires that a program be established and implemented to ensure that SG tube integrity is maintained. Pursuant to Specification 5.5.9, tube integrity is maintained when the SG performance criteria are met. There are three SG performance criteria: structural integrity, accident induced leakage, and operational LEAKAGE. The SG performance criteria are described in Specification 5.5.9. Meeting the SG performance criteria provides reasonable assurance of maintaining tube integrity at normal and accident conditions.

The processes used to meet the SG performance criteria are defined by the Steam Generator Program Guidelines (Ref. 1).

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-107 Revision 11NEW PAGE B 3.4-107

TXX-35182 Attachment 3 Page 14 of 18 SG Tube Integrity B 3.4.17 BASES (continued)

APPLICABLE The steam generator tube rupture (SGTR) accident is the limiting design SAFErT basis event for SG tubes and avoiding an SGTR is the basis for ANALYSES this Specification. The analysis of a SGTR event assumes a bounding primary to secondary LEAKAGE rate equal to the operational LEAKAGE rate limits in LCO 3.4.13, 'RCS Operational LEAKAGE," plus the leakage rate associated with a double-ended rupture of a single tube. The accident analysis for a SGTR assumes the contaminated secondary fluid is only briefly released to the atmosphere via safety valves and the majority is discharged to the main condenser.

The analysis for design basis accidents and transients other than a SGTR assume the SG tubes retain their structural integrity (i.e., they are assumed not to rupture.) In these analyses, the steam discharge to the atmosphere is based on the total primary to secondary LEAKAGE from all SGs of 1 gallon per minute or is assumed to increase to 1 gallon per minute as a result of accident induced conditions. For accidents that do not involve fuel damage, the primary coolant activity level of DOSE EQUIVALENT 1-131 is assumed to be equal to the LCO 3.4.16, "RCS Specific Activity," iimits. For accidents that assume fuel damage, the primary coolant activity is a function of the amount of activity released from the damaged fuel. The dose consequences of these events are within the limits of GDC 19 (Ref. 2), 10 CFR 100 (Ref. 3) or the NRC approved licensing basis (e.g., a small fraction of these limits).

Steam generator tube integrity satisfies Criterion 2 of 10 CFR 50.36(c)(2)(ii).

LCO The LCO requires that SG tube integrity be maintained. The LCO also requires that all SG tubes that satisfy the repair criteria be plugged or repaired in accordance with the Steam Generator Program.

During an SG inspection, any inspected tube that s3tisfies the Steam Generator Program repair criteria is repaired or removed from service by plugging. If a tube was determined to satisfy the repair criteria but was not plugged or repaired, the tube may still have tube integrity.

In the context of this Specification, a SG tube is defined as the entire length of the tube, including the tube wall and any repairs made to it, between the tube-to-tubesheet weld at the tube inlet and the tube-to-tubesheet weld at the tube outlet. The tube-to-tubesheet weld is not considered part of the tube.

A SG tube has tube integrity when it satisfies the SG performance criteria.

The SG performance criteria are defined in Specification 5.5.9, 'Steam Generator Program," and describe acceptable SG tube performance. The Steam Generator Program also provides the evaluation process for determining conformance with the SG performance criteria.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-108 Revision I

NEW PAGE B 3.4-108 l

TXX-05182 Attachment 3 Page 15 of 18 SG Tube Integrity B 3.4.17 BASES LCO There are three SG performance criteria: structural integrity, accident (continued) induced leakage, and operational LEAKAGE. Failure to meet any one of these criteria is considered failure to meet the LCO.

The structural integrity performance criterion provides a margin of safety against tube burst or collapse under normal and accident conditions, and ensures structural integrity of the SG tubes under all anticipated transients included in the design specification. Tube burst is defined as, 'The gross structural failure of the tube wall. The condition typically corresponds to an unstable opening displacement (e.g., opening area increased in response to constant pressure) accompanied by ductile (plastic) tearing of the tube material at the ends of the degradation." Tube collapse is defined as, 'For the load displacement curve for a given structure, collapse occurs at the top of the load versus displacement curve where the slope of the curve becomes zero." The structural integrity performance criterion provides guidance on assessing loads that have a significant effect on burst or collapse. In that context, the term "significant" is defined as 'An accident loading condition other than differential pressure is considered significant when the addition of such loads in the assessment of the structural integrity performance criterion could cause a lower structural limit or limiting burst/collapse condition to be established." For tube integrity evaluations, except for circumferential degradation, axial thermal loads are classified as secondary loads. For circumferential degradation, the classification of axial thermal loads as primary or secondary loads will be evaluated on a case-by-case basis. The division between primary and secondary classifications will be based on detailed analysis and/or testing.

Structural integrity requires that the primary membrane stress intensity in a tube not exceed the yield strength for all ASME Code,Section III, Service Level A (normal operating conditions) and Service Level B (upset or abnormal conditions) transients included in the design specification. This includes safety factors and applicable design basis loads based on ASME Code, Section 1II,Subsection NB (Ref. 4) and Draft Regulatory Guide 1.121 (Ref. 5).

The accident induced leakage performance criterion ensures that the primary to secondary LEAKAGE caused by a design basis accident, other than a SGTR, is within the accident analysis assumptions. The accident analysis assumes that accident induced leakage does not exceed 1 gpm per SG, except for specific types of degradation at specific locations where the NRC has approved greater accident induced leakage. The accident induced leakage rate includes any primary to secondary LEAKAGE existing prior to the accident in addition to primary to secondary LEAKAGE induced during the accident.

(continued)

COMANCHE PEAK - UNITS I AND 2 B 3.4-109 Revision ll NEW PAGE B 3.4-109 ll

TXX-05182 Attachment 3 Page 16 of 18 SG Tube Integrity B 3.4.17 BASES LCO The operational LEAKAGE performance criterion provides an observable (continued) indication of SG tube conditions during plant operation. The limit on operational LEAKAGE is contained in LCO 3.4.13, 'RCS Operational LEAKAGE," and limits primary to secondary LEAKAGE through any one SG to 150 gallons per day. This limit is based on the assumption that a single crack leaking this amount would not propagate to a SGTR under the stress conditions of a LOCA or a main steam line break. If this amount of LEAKAGE is due to more than one crack, the cracks are very small, and the above assumption is conservative.

APPLICABILITY Steam generator tube integrity is challenged when the pressure differential across the tubes is large. Large differential pressures across SG tubes can only be experienced in MODE 1, 2, 3, or 4.

RCS conditions are far less challenging in MODES 5 and 6 than during MODES 1, 2, 3, and 4. In MODES 5 and 6, primary to secondary differential pressure is low, resulting in lower stresses and reduced potential for LEAKAGE.

ACTIONS The ACTIONS are modified by a Note clarifying that the Conditions may be entered independently for each SG tube. This is acceptable because the Required Actions provide appropriate compensatory actions for each affected SG tube. Complying with the Required Actions may allow for continued operation, and subsequent affected SG tubes are governed by subsequent Condition entry and application of associated Required Actions.

A.1 and A.2 Condition A applies if it is discovered that one or more SG tubes examined in an inservice inspection satisfy the tube repair criteria but were not plugged or repaired in accordance with the Steam Generator Program as required by SR 3.4.17.2. An evaluation of SG tube integrity of the affected tube(s) must be made. Steam generator tube integrity is based on meeting the SG performance criteria described in the Steam Generator Program.

The SG repair criteria define limits on SG tube degradation that allow for flaw growth between inspections while still providing assurance that the SG performance criteria will continue to be met. In order to determine if a SG tube that should have been plugged or repaired has tube integrity, an evaluation must be completed that demonstrates that the SG performance criteria will continue to be met until the next refueling outage or SG tube inspection. The tube integrity determination is based on the estimated condition of the tube at the time the situation is discovered and the estimated growth of the degradation prior to the next SG tube inspection. If it is determined that tube integrity is not being maintained, Condition B applies.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-1 10 Revision I NEW PAGE B 3.4-110 I I

TXX-05182 Attachment 3 Page 17 of 18 SG Tube Integrity B 3.4.17 BASES ACTIONS A Completion Time of 7 days is sufficient to complete the evaluation while (continued) minimizing the risk of plant operation with a SG tube that may not have tube integrity.

If the evaluation determines that the affected tube(s) have tube integrity, Required Action A.2 allows plant operation to continue until the next refueling outage or SG inspection provided the inspection interval continues to be supported by an operational assessment that reflects the affected tubes. However, the affected tube(s) must be plugged or repaired prior to entering MODE 4 following the next refueling outage or SG inspection. This Completion Time is acceptable since operation until the next inspection is supported by the operational assessment.

B.1 and B.2 If the Required Actions and associated Completion Times of Condition A are not met or if SG tube integrity is not being maintained, the reactor must be brought to MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and MODE 5 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . The allowed Completion Times are reasonable, based on operating experience, to reach the desired plant conditions from full power conditions in an orderly manner and without challenging plant systems.

SURVEILLANCE SR 3.4.17.t REQUIREMENTS During shutdown periods the SGs are inspected as required by this SR and the Steam Generator Program. NEI 97-06, Steam Generator Program Guidelines (Ref. 1), and its referenced EPRI Guidelines, establish the content of the Steam Generator Program. Use of the Steam Generator Program ensures that the inspection is appropriate and consistent with accepted industry practices.

During SG inspections a condition monitoring assessment of the SG tubes is performed. The condition monitoring assessment determines the 'as found" condition of the SG tubes. The purpose of the condition monitoring assessment is to ensure that the SG performance criteria have been met for the previous operating period.

The Steam Generator Program determines the scope of the inspection and the methods used to determine whether the tubes contain flaws satisfying the tube repair criteria. Inspection scope (i.e., which tubes or areas of tubing within the SG are to be inspected) is a function of existing and potential degradation locations. The Steam Generator Program also specifies the inspection methods to be used to find potential degradation.

Inspection methods are a function of degradation morphology, non-destructive examination (NDE) technique capabilities, and inspection locations.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-111 Revision NEW PAGE B 3.4-111 l

TXX-05182 Attachment 3 Page 18 of 18 SG Tube Integrity B 3.4.17 BASES SUVEILLANCE The Steam Generator Program defines the Frequency of SR 3.4.17.1. The REQUIREMENTS Frequency is determined by the operational assessment and other limits in (continued) the SG examination guidelines (Ref. 6). The Steam Generator Program uses information on existing degradations and growth rates to determine an inspection Frequency that provides reasonable assurance that the tubing will meet the SG performance criteria at the next scheduled inspection. In addition, Specification 5.5.9 contains prescriptive requirements concerning inspection intervals to provide added assurance that the SG performance criteria will be met between scheduled inspections.

SR 3.4.17.2 During an SG inspection, any inspected tube that satisfies the Steam Generator Program repair criteria is repaired or removed from service by plugging. The tube repair criteria delineated in Specification 5.5.9 are intended to ensure that tubes accepted for continued service satisfy the SG performance criteria with allowance for error in the flaw size measurement and for future flaw growth. In addition, the tube repaircriteria, in conjunction with other elements of the Steam Generator Program, ensure that the SG performance criteria will continue to be met until the next inspection of the subject tube(s). Reference I provides guidance for performing operational assessments to verify that the tubes remaining in service will continue to meet the SG performance criteria.

Steam generator tube repairs are only performed using approved repair methods as described in the Steam Generator Program.

The Frequency of prior to entering MODE 4 following a SG inspection ensures that the Surveillance has been completed and all tubes meeting the repair criteria are plugged or repaired prior to subjecting the SG tubes to significant primary to secondary pressure differential.

REFERENCES 1. NEI 97-06, "Steam Generator Program Guidelines."

2. 10 CFR 50 Appendix A, GDC 19.

3. 10CFR100.

4. ASME Boiler and Pressure Vessel Code,Section III, Subsection NB.

5. Draft Regulatory Guide 1.121, 'Basis for Plugging Degraded Steam Generator Tubes," August 1976.

6. EPRI, 'Pressurized Water Reactor Steam Generator Examination Guidelines."

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-112 Revision I NEW PAGE B 3.4-112 It

ATTACLIMENT 4 to TXX-05182 RETYPED TECHNICAL SPECIFICATION PAGES Pages ii 1.1-4 3.4-33 3.4-34 3.4-48 3.4-49 5.0-13 5.0-14 5.0-15 5.0-iSa 5.0-16 5.0-16a 5.0-17 5.0-17a 5.0-18 5.0-19 5.0-19a 5.0-19b 5.0-19c 5.0-19d 5.0-36 5.0-36a 5.0-36b

TXX-05182 Attachment 4 Page 2 of 24 TABLE OF CONTENTS (continued) 3.4 REACTOR COOLANT SYSTEM (RCS) .................. ............................ 3.4-1 3.4.1 RCS Pressure, Temperature, and Flow Departure from Nucleate Boiling (DNB) Limits .............................................. 3.4-1 3.4.2 RCS Minimum Temperature for Criticality .......................................... .... 3.4-4 3.4.3 RCS Pressure and Temperature (PIT) Limits .............................................. 3.4-5 3.4.4 RCS Loops -MODES 1 and 2.............................................. 3.4-7 3.4.5 RCS Loops - MODE 3 .............................................. 3.4-8 3.4.6 RCS Loops- MODE 4 .............................................. 3.4-11 3.4.7 RCS Loops -MODE 5, Loops Filled ................... ........................... 3.4-14 3.4.8 RCS Loops -MODE 5, Loops Not Filled ............................... ............... 3.4-17 3.4.9 Pressurizer .............................................. 3.4-19 3.4.10 Pressurizer Safety Valves .............................................. 3.4-21 3.4.11 Pressurizer Power Operated Relief Valves (PORVs) ..................................... 3.4-23 3.4.12 Low Temperature Overpressure Protection (LTOP) System ............... ........... 3.4-27 3.4.13 RCS Operational LEAKAGE .............................................. 3.4-33 3.4.14 RCS Pressure Isolation Valve (PIV) Leakage .............................................. 3.4-35 3.4.15 RCS Leakage Detection Instrumentation .............................................. 3.4-40 3.4.16 RCS Specific Activity .............................................. 3.4-44 3.4.17 Steam Generator (SG) Tube Integrity .............................................. 3.4-48 3.5 EMERGENCY CORE COOLING SYSTEMS (ECCS) ........................................... 3.5-1 3.5.1 Accumulators .............................................. 3.5-1 3.5.2 ECCS -Operating .............................................. 3.5-4 3.5.3 ECCS - Shutdown .............................................. 3.5-8 3.5.4 Refueling Water Storage Tank (RWST) ............................... ............... 3.5-10 3.5.5 Seal Injection Flow .............................................. 3.5-12 3.6 CONTAINMENT SYSTEMS .............................................. 3.6-1 3.6.1 Containment .............................................. 3.6-1 3.6.2 Containment Air Locks .............................................. 3.6-2 3.6.3 Containment Isolation Valves .............................................. 3.6-7 3.6.4 Containment Pressure .............................................. 3.6-16 3.6.5 Containment Air Temperature .............................................. 3.6-17 3.6.6 Containment Spray System .............................................. 3.6-18 3.6.7 Spray Additive System .............................................. 3.6-20 (continued)

COMANCHE PEAK - UNITS 1 AND 2 .. Amendment No.

TXX-05182 Attachment 4 Page 3 of 24 Definitions 1.1 1.1 Definitions (continued)

LEAKAGE LEAKAGE shall be:

a. Identified LEAKAGE

1. LEAKAGE, such as that from pump seals or valve packing (except reactor coolant pump (RCP) seal water injection or leakoff), that is captured and conducted to collection systems or a sump or collecting tank;

2. LEAKAGE into the containment atmosphere from sources that are both specifically located and known either not to interfere with the operation of leakage detection systems or not to be pressure boundary LEAKAGE; or

3. Reactor Coolant System (RCS) LEAKAGE through a steam generator to the Secondary System (primary to secondary LEAKAGE);

b. Unidentified LEAKAGE All LEAKAGE (except RCP seal water injection or leakoff) that is not identified LEAKAGE;

c. Pressure Boundary LEAKAGE LEAKAGE (except primary to secondary LEAKAGE) through a nonisolable fault in an RCS component body, pipe wall, or vessel wall.

MASTER RELAY TEST A MASTER RELAY TEST shall consist of energizing all master relays in the channel req uired for channel OPERABILITY and verifying the OPERABILITY of each req uired master relay. The MASTER RELAY TEST shall include a continuity check of each associated req uired slave relay. The MASTER RELAY TEST may be performed by means of any series of seq uential, overlapping or total steps.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 1 .1-4 Amendment No.

TXX-05182 Attachment 4 Page 4 of 24 RCS Operational LEAKAGE 3.4.13 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.13 RCS Operational LEAKAGE LCO 3.4.13 RCS operational LEAKAGE shall be limited to:

a. No pressure boundary LEAKAGE;

b. I gpm unidentified LEAKAGE;

c. 10 gpm identified LEAKAGE; and

d. 150 gallons per day primary to secondary LEAKAGE through any one steam generator (SG).

APPLICABILITY: MODES 1, 2, 3, and 4 ACTIONS CONDITION REQUIRED ACTION COMPLETION TIME A. RCS operational LEAKAGE A.1 Reduce LEAKAGE to 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months not within limits for reasons within limits.

other than pressure boundary LEAKAGE or primary to secondary LEAKAGE.

B. Required Action and B.1 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion Time of Condition A not met. AND OR B.2 Be in MODE 5. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months Pressure boundary LEAKAGE exists.

Primary to secondary LEAKAGE not within limits COMANCHE PEAK - UNITS 1 AND 2 3.4-33 Amendment No.

TXX-(5182 Attachment 4 Page 5 of 24 RCS Operational LEAKAGE 3.4.13 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.13.1 -------------------------------- NOTES---------------------------------

1. Not required to be performed until 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months after establishment of steady state operation.

2. Not applicable to primary to secondary LEAKAGE.

Perform RCS water inventory balance. 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months SR 3.4.13.2 -------------------------------- NOTE----------------------------------

Not required to be performed until 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months after establishment of steady state operation.

Verify primary to secondary LEAKAGE is <150 gallons per 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months day through any one SG.

COMANCHE PEAK - UNITS 1 AND 2 3.4-34 Amendment No.

, XX-05182 Attachment 4 Page 6 of 24 SG Tube Integrity 3.4.17 3.4 REACTOR COOLANT SYSTEM (RCS) 3.4.17 Steam Generator (SG) Tube Integrity LCO 3.4.17 SG tube integrity shall be maintained.

All SG tubes satisfying the tube repair criteria shall be plugged or repaired in accordance with the Steam Generator Program.

APPLICABILITY: MODES 1, 2, 3, and 4 ACTIONS NMt

&Iam r----------------------------------------------------------

I Separate Condition entry is allowed for each SG tube.

CONDITION REQUIRED ACTION COMPLETION TIME A. One or more SG tubes A.1 Verify tube integrity of the 7 days satisfying the tube repair affected tube(s) is criteria and not plugged or maintained until the next repaired in accordance with refueling outage or SG the Steam Generator tube inspection.

Program.

AND A.2 Plug or repair the affected Prior to entering tube(s) in accordance with MODE 4 following the the Steam Generator next refueling outage Program. or SG tube inspection B. Required Action and B.1 Be in MODE 3. 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months associated Completion Time of Condition A not met. AND OR B.2 Be in MODE 5. 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months SG tube integrity not maintained. _

COMANCHE PEAK - UNITS 1 AND 2 3.4-48 Amendment No.

TXX-05182 Attachment 4 Page 7 of 24 SG Tube Integrity 3.4.17 SURVEILLANCE REQUIREMENTS SURVEILLANCE FREQUENCY SR 3.4.17.1 Verify SG tube integrity in accordance with the Steam In accordance with Generator Program. the Steam Generator Program SR 3.4.17.2 Verify that each inspected SG tube that satisfies the Prior to entering tube repair criteria is plugged or repaired in MODE 4 following a accordance with the Steam Generator Program. SG tube inspection COMANCHE PEAK - UNITS 1 AND 2 3.4-49 Amendment No.

TXX-05182 Attachment 4 Page 8 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.9 Steam Generator (SG) Proaram 5.5.9.1 Unit I model D4 Steam Generator (SG) Proaram Each steam generator shall be demonstrated OPERABLE by performance of the following augmented inservice inspection program.

The provisions of SR 3.0.2 are applicable to the SG Surveillance Program test frequencies.

a. Steam Generator Sample Selection and Inspection - Each steam generator shall be determined OPERABLE during shutdown by selecting and inspecting at least the minimum number of steam generators specified in Table 5.5-1.

b. Steam Generator Tube Sample Selection and Inspection - The steam generator tube minimum sample size, inspection result classification, and the corresponding action required shall be as specified in Table 5.5-2 or 5.5-3. Table 5.5-2 applies to all tubes except repaired tubes (Unit 1 only) which are covered by Table 5.5-3. The inservice inspection of steam generator tubes shall be performed at the frequencies specified in Specification 5.5.9.1d., and the inspected tubes shall be verified acceptable per the acceptance criteria of Specification 5.5.9.1e. The tubes selected for each inservice inspection per Table 5.5-2 shall include at least 3% of all the expanded tubes and at least 3% of the remaining number of tubes in all steam generators; the tubes selected for these inspections shall be selected on a random basis except:

1. Where experience in similar plants with similar water chemistry indicates critical areas to be inspected, then at least 50% of the tubes inspected shall be from these critical areas;

2. The first sample of tubes selected for each inservice inspection (subsequent to the preservice inspection) of each steam generator shall include:

a) All nonplugged tubes that previously had detectable wall penetrations (greater than 20%),

b) Tubes in those areas where experience has indicated potential problems, and (continued)

COMANCHE PEAK - UNITS 1AND 2 5.0-1 3 Amendment No.

TXX-05182 Attachment 4 Page 9 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued)

C) A tube inspection (pursuant to Specification 5.5.9.1e.1 .h) shall be performed on each selected tube. If any selected tube does not permit the passage of the eddy current probe for a tube inspection, this shall be recorded and an adjacent tube shall be selected and subjected to a tube inspection.

d) Indications left in service as a result of the application of the tube support plate voltage repair criteria shall be inspected by bobbin probe during all future refueling outages.

3. The tubes selected as the second and third samples (if required by Table 5.5-2 during each inservice inspection may be subjected to a partial tube inspection provided:

a) The tubes selected for these samples include the tubes from those areas of the tube sheet array where tubes with imperfections were previously found, and b) The inspections include those portions of the tubes where imperfections were previously found.

4. Implementation of the steam generator tube/tube support plate repair criteria requires a 100% bobbin coil inspection for hot-leg and cold-leg tube support plate intersections down to the lowest cold-leg support with known outside diameter stress corrosion cracking (ODSCC) indications. The Determination of the lowest cold leg tube support plate intersections having ODSCC indications shall be based on the performance of at least a 20%

random sampling of the tubes inspected over their full length.

The results of each sample inspection shall be classified into one of the following three categories:

Category Inspection Results C-1 Less than 5% of the total tubes inspected are degraded tubes and none of the inspected tubes are defective.

(continued)

COMANCHE PEAK - UNITS 1AND 2 5.0-14 Amendment No.

TXX-05182 Attachment 4 Page 10 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued)

C-2 One or more tubes, but not more than 1%of the total tubes inspected are defective, or between 5% and 10% of the total tubes inspected are degraded tubes.

C-3 More than 10% of the total tubes inspected are degraded tubes or more than 1% of the inspected tubes are defective.

Note: In all inspections, previously degraded tubes must exhibit significant (greater than 10%) further wall penetrations to be included in the above percentage calculations.

c. Steam Generator F* Tube Inspection (Unit 1 only) - In addition to the minimum sample size as determined by Specification 5.5.9.1b., all F*

tubes will be inspected within the tubesheet region. The results of the inspections of F* tubes identified in previous inspections will not be a cause for additional inspections per Tables 5.5-1 and 5.5-2.

d. Inspection Frequencies - The above required inservice inspections of steam generator tubes shall be performed at the following frequencies:

1. The first inservice inspection shall be performed after 6 Effective Full Power Months (EFPM) and before 12 EFPM and shall include a special inspection of all expanded tubes in all steam generators.

Subsequent inservice inspections shall be performed at intervals of not less than 12 nor more than 24 calendar months after the previous inspection. If two consecutive inspections, not including the preservice inspection, result in all inspection results falling into the C-1 category or if two consecutive inspections demonstrate that previously observed degradation has not continued and no additional degradation has occurred, the inspection interval may be extended to a maximum of once per 40 months;

2. If the results of the inservice inspection of a steam generator conducted in accordance with Table 5.5-2 at 40-month intervals fall in Category C-3, the inspection frequency shall be increased to at least once per 20 months. The increase in inspection frequency shall apply until the subsequent inspections satisfy the criteria of Specification 5.5.9.1d.1; the interval may then be extended to a maximum of once per 40 months; and (continued)

COMANCHE PEAK- UNITS 1 AND 2 5.0-15 Amendment No.

TXX-05182 Attachment 4 Page 11 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Proaram (continued)

3. Additional, unscheduled inservice inspections shall be performed on each steam generator in accordance with the first sample inspection specified in Table 5.5-2 during the shutdown subsequent to any of the following conditions:

a) Primary-to secondary tube leaks (not including leaks originating from tube-to-tube sheet welds) in excess of the I limits of Specification 3.4.13, or b) A seismic occurrence greater than the Operating Basis Earthquake, or c) A loss-of-coolant accident requiring actuation of the Engineered Safety Features, or d) A main steam line or feedwater line break.

e. Acceptance Criteria

1. As used in this specification:

a) Imperfection means an exception to the dimensions, finish, or contour of a tube from that required by fabrication drawings or specifications. Eddy-current testing indications below 20% of the nominal tube wall thickness, if detectable, may be considered as imperfections; b) Degradation means a service-induced cracking, wastage, wear, or general corrosion occurring on either inside or outside of a tube; c) Degraded Tube means a tube containing imperfections greater than or equal to 20% of the nominal wall thickness caused by degradation; d) % Degradation means the percentage of the tube wall thickness affected or removed by degradation; e) Defect means an imperfection of such severity that it exceeds the plugging limit or (for Unit 1 only) repair limit. A tube containing a defect is defective; (continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-15a Amendment No.

TXX-C5182 Attachment 4 Page 12 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued) f) Plugging or Repair Limit means the imperfection depth at or beyond which the tube shall be removed from service by plugging or (for Unit 1 only) repaired by sleeving and is equal to 40% of the wall thickness. The plugging limit for laser welded sleeves is equal to 43% of the nominal wall thickness.

The plugging limit for Leak Tight sleeves is equal to 20% of the nominal wall thickness. This definition does not apply to that portion of the Unit 1 tubing that meets the definition of an F* tube. This definition does not apply to tube support plate intersections for which the voltage-based plugging criteria are being applied. Refer to 5.5.9.1e.1m) for the repair limit applicable to these intersections. All tubes repaired with Leak Limiting sleeves shall be plugged upon detection of degradation in the sleeve and/or pressure boundary portion of the original tube wall in the sleeve/tube assembly (i.e., the sleeve-to-tube joint) regardless of depth. The F* criteria is not applicable to the parent tube located behind the Leak Limiting sleeves installed in the tubesheet transition zone; g) Unserviceable describes the condition of a tube if it leaks or contains a defect large enough to affect its structural integrity in the event of an Operating Basis Earthquake, a loss-of-coolant accident, or a steam line or feedwater line break as specified in Specification 5.5.9.1d.3, above; h) Tube Insgection means an inspection of the steam generator tube from the tube end (hot leg side) completely around the U-bend to the top support of the cold leg. For a tube repaired by sleeving (for Unit 1 only) the tube inspection shall include the sleeved portion of the tube; i) Preservice Inspection means an inspection of the full length of each tube in each steam generator performed by eddy current techniques prior to service to establish a baseline condition of the tubing. This inspection shall be performed prior to initial POWER OPERATION using the equipment and techniques expected to be used during subsequent inservice inspections; j) F* Distance (Unit 1 only) is the distance of the hardroll expanded portion of a tube which provides a sufficient length of non-degraded tube expansion to resist pullout of the tube from the tubesheet. The F* distance is equal to 1.13 inches, plus an allowance for eddy current measurement uncertainty, and is measured down from the top of the tubesheet, or the bottom of the roll transition, whichever is lower in elevation.

The F* criteria is not applicable to the parent tube located behind the Leak Limiting sleeves installed in the tubesheet transition zone; k) F* Tube (Unit 1 only) is that portion of the tubing in the area of the tubesheet region below the F* distance with a) degradation below the F* distance equal to or greater than 40%, b) which has no indication of degradation within the F*

distance, and c) that remains inservice; (continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-16 Amendment No.

TXX-05182 Attachment 4 Page 13 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued)

I) Hard Roll ExDansion (Unit 1 only) is that portion of a tube which has been increased in diameter by a rolling process such that no crevice exists between the outside diameter of the tube and the hole in the tubesheet; and m) For Unit 1 only. the Tube Support Plate Plugging Limit is used for the disposition of alloy 600 steam generator tubes for continued service that are experiencing predominantly axially oriented outside diameter stress corrosion cracking confined within the thickness of the tube support plates and flow distribution baffle (FDB). At tube support plate intersections (and FDB), the plugging limit is based on maintaining steam generator tube serviceability as described below:

1. Steam generator tubes, whose degradation is attributed to outside diameter stress corrosion cracking within the bounds of the tube support plate with bobbin voltages less than or equal to the lower voltage repair limit (1.0 volt), will be allowed to remain in service.

2. Steam generator tubes, whose degradation is attributed to outside diameter stress corrosion cracking within the bounds of the tube support plate with the bobbin voltage greater than the lower voltage repair limit (1.0 volt), will be repaired, except as noted in 5.5.9.1e.1 m)3. below.

3. Steam generator tubes with indications of potential degradation attributed to outside diameter stress corrosion cracking within the bounds of the tube support plate with a bobbin voltage greater than the lower voltage repair limit (1.0 volt) but less than or equal to the upper voltage repair limit*, may remain inservice if a rotating pancake coil inspection does not detect degradation. Steam generator tubes, with indications of outside diameter stress corrosion cracking degradation with a bobbin voltage greater than the upper repair limit** will be plugged or repaired.

(continued)

The upper voltage repair limit is calculated according to the methodology in GL 95-05 as supplemented.

- VURL will differ at the TSPs and flow distribution baffle.

COMANCHE PEAK - UNITS 1AND 2 5.0-16a Amendment No.

TXX-05182 Attachment 4 Page 14 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued)

4. Certain intersections as identified in WPT-15949 will be excluded from application of the voltage-based repair criteria as it is determined that these intersections may collapse or deform following a postulated LOCA + SSE event.

5. If an unscheduled mid-cycle inspection is performed, the following mid-cycle repair limits apply instead of the limits identified in 5.5.9.1e.1.m)1., 5.5.9.1e.1.m)2., and 5.5.9.1e.1.m)3. The midcycle repair limits are determined from the following equations:

VMURL = VSL 1.0+NDE+Gr (CL-At)

VMLRL= VMURL (VURL - VLRL)[ CL-At]

where:

VUR = upper voltage repair limit VLRL= lower voltage repair limit VMURL = mid-cycle upper voltage limit based on time into cycle VMLRL = mid-cycle lower voltage repair limit based on VMLRL and time into cycle

)t = length of time since last scheduled inspection during which VURL and VLRL were implemented CL = cycle length (the time between two scheduled steam generator inspections)

VSL = structural limit voltage Gr = average growth per cycle NDE = 95-percent cumulative probability allowance for nondestructive examination uncertainty (i.e., a value of 20-percent has been approved by the NRC)

Implementation of these mid-cycle repair limits should follow the same approach as in TS 5.5.9.1e.1.m)1.,

5.5.9.1e.1m)2., and 5.5.9.1e.1.m)3.

n. Tube ReDair (for Unit 1 only) refers to the process that establishes tube serviceability. Acceptable tube repairs will be performed in accordance with the process described in Westinghouse WCAP-1 3698, Rev. 3 and Westinghouse Letter WPT-16094 dated March 20, 2000, WCAP-1 5090, Rev. 1, CEN-630-P, Rev. 2 dated June 1997, and WCAP-15918, Rev. 1, dated January, 2004.

(continued)

COMANCHE PEAK- UNITS 1 AND 2 5.0-17 Amendment No.

TXX-05182 Attachment 4 Page 15 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit I model D4 Steam Generator (SG) Program (continued) l

2. The steam generator shall be determined OPERABLE after completing the corresponding actions (plug all tubes exceeding the plugging limit and all tubes containing through-wall cracks) required by Table 5.5-2 and Table 5.5-3.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-1 7a Amendment No.

TXX-05182 Attachment 4 Page 16 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued)

TABLE 5.5-1 MINIMUM NUMBER OF STEAM GENERATORS TO BE INSPECTED DURING INSERVICE INSPECTION Preservice Inspection Four No. of Steam Generators per Unit Four First Inservice Inspection Two Second & Subsequent Inservice Inspections One' TABLE NOTATIONS The two steam generators that were not inspected during the first inservice inspection shall be inspected during the second and third inspections, one in each inspection period. For the fourth and subsequent inspections, the inservice inspection may be limited to one steam generator on a rotating schedule encompassing 12% of the tubes if the results of the previous inspections of the four steam generators indicate that all steam generators are performing in a like manner. Note that under some circumstances, the operating conditions in one or more steam generators may be found to be more severe than those in other steam generators. Under such circumstances the sample sequence shall be modified to inspect the most severe conditions.

(continued)

COMANCHE PEAK - UNITS 1AND 2 5.0-18 Amendment No.

TXX-05182 Attachment 4 Page 17 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued) I TABLE 5.5-2 STEAM GENERATOR TUBE INSPECTION 1 sT SAMPLE 2ND SAMPLE 3 RD SAMPLE INSPECTION INSPECTION INSPECTION Sample Result Action Result Action Result Action size Required Required Required A C-1 None N.A. N.A. N.A. N.A.

I .L .4 .4 4 minimum of C-2 Plug or repair* C-1 None N.A. N.A.

S Tubes defective tubes per S.G. and inspect C-2 Plug or repair' C-1 None additional 2S defective tubes tubes in this S.G. and inspect C-2 Plug or repair*

additional 4S defective tubes tubes in this S.G.

C-3 Perform action for C-3 result of first sample C-3 Perform action for N.A. N.A.

C-3 result of first sample

.4 4 4 4. 4 C-3 Inspect all tubes All other None N.A. N.A.

in this S.G., plug S.G.s are or repair* C-1 defective tubes and Inspect 2S Some Perform action for N.A. N.A.

tubes in each S.G.s C-2 C-2 result of other S.G. but no second sample additional S.G. C-3 Additional Inspect all tubes N.A. N.A.

S.G. is in each S.G. and C-3 plug or repair*

defective tubes.

(continued)

S = 12/n% Where n is the number of steam generators inspected during an inspection

for Unit I only COMANCHE PEAK - UNITS 1 AND 2 5.0-1 9 Amendment No.

TXX-05182 Attachment 4 Page 18 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals 5.5.9.1 Unit 1 model D4 Steam Generator (SG) Program (continued) I TABLE 5.5-3 STEAM GENERATOR REPAIRED TUBE INSPECTION FOR UNIT I ONLY 1 ST SAMPLE INSPECTION 2 ND SAMPLE INSPECTION Sample Size Result Action Required Result Action Required A minimum C-1 None N.A. N.A.

of 20% of repaired tubes (1) .

C-2 Plug defective repaired C-1 None tubes and inspect 100%

of the repaired tubes in this S.G.

C-2 Plug defective repaired tubes C-3 Perform action for C-3 result of first sample C-3 Inspect all repaired tubes All other None in this S.G., plug S.G.s are defective tubes and C-1 inspect 20% of the repaired tubes in each Same Perform action for C-2 result of other S.G. S.G.s C-2 first sample but no additional S.G. are

_____ 0~~~~~-3 _ _ _ _ _ _ _ _ _ _

Additional Inspect all repaired tubes in S.G is C-3 each S.G. and plug defective tubes.

(continued) I (1) Each repair method is considered a separate population for determination of initial inservice inspection and scope expansion.

COMANCHE PEAK- UNITS 1 AND 2 5.0-19a Amendment No.

TXX-05182 Attachment 4 Page 19 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.9.2 Unit 1 model D76 and Unit 2 model D5 Steam Generator (SG) Program A Steam Generator Program shall be established and implemented to ensure that SG tube integrity is maintained. In addition, the Steam Generator Program shall include the following provisions:

a. Provisions for condition monitoring assessments. Condition monitoring assessment means an evaluation of the was found" condition of the tubing with respect to the performance criteria for structural integrity and accident induced leakage. The was found" condition refers to the condition of the tubing during an SG inspection outage, as determined from the inservice inspection results or by other means, prior to the plugging of tubes.

Condition monitoring assessments shall be conducted during each outage during which the SG tubes are inspected or plugged to confirm that the performance criteria are being met.

b. Performance criteria for SG tube integrity. SG tube integrity shall be maintained by meeting the performance criteria for tube structural integrity, accident induced leakage, and operational LEAKAGE.

1. Structural integrity performance criterion: All in-service steam generator tubes shall retain structural integrity over the full range of normal operating conditions (including startup, operation in the power range, hot standby, and cool down and all anticipated transients included in the design specification) and design basis accidents. This includes retaining a safety factor of 3.0 against burst under normal steady state full power operation primary-to-secondary pressure differential and a safety factor of 1.4 against burst applied to the design basis accident primary-to-secondary pressure differentials. Apart from the above requirements, additional loading conditions associated with the design basis accidents, or combination of accidents in accordance with the design and licensing basis, shall also be evaluated to determine if the associated loads contribute significantly to burst or collapse. In the assessment of tube integrity, those loads that do significantly affect burst or collapse shall be determined and assessed in combination with the loads due to pressure with a safety factor of 1.2 on the combined primary loads and 1.0 on axial secondary loads.

2. Accident induced leakage performance criterion: The primary to secondary accident induced leakage rate for any design basis accident, other than a SG tube rupture, shall not exceed the leakage rate assumed in the accident analysis in terms of total leakage rate for all SGs and leakage rate for an individual SG. Leakage is not to exceed 1 gpm per SG.

3. The operational LEAKAGE performance criterion is specified in LCO 3.4.13, "RCS Operational LEAKAGE."

(continued)

COMANCHE PEAK - UNITS I AND 2 5.0-1 9b Amendment No.

TXX-05182 Attachment 4 Page 20 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.9.2 Unit 1 model D76 and Unit 2 model D5 Steam Generator (SG) Program (continued)

c. Provisions for SG tube repair criteria. Tubes found by inservice inspection to contain flaws with a depth equal to or exceeding 40% of the nominal tube wall thickness shall be plugged.

d. Provisions for SG tube inspections. Periodic SG tube inspections shall be performed. The number and portions of the tubes inspected and methods of inspection shall be performed with the objective of detecting flaws of any type (e.g., volumetric flaws, axial and circumferential cracks) that may be present along the length of the tube, from the tube-to-tubesheet weld at the tube inlet to the tube-to-tubesheet weld at the tube outlet, and that may satisfy the applicable tube repair criteria. The tube-to-tubesheet weld is not part of the tube. In addition to meeting the requirements of d.1, d.2, and d.3 below, the inspection scope, inspection methods, and inspection intervals shall be such as to ensure that SG tube integrity is maintained until the next SG inspection.

An assessment of degradation shall be performed to determine the type and location of flaws to which the tubes may be susceptible and, based on this assessment, to determine which inspection methods need to be employed and at what locations.

1. Inspect 100% of the tubes in each SG during the first refueling outage following SG replacement.

2a. For the Unit 2 model D5 steam generators (Alloy 600 thermally treated) inspect 100% of the tubes at sequential periods of 120, 90, and, thereafter, 60 effective full power months. The first sequential period shall be considered to begin after the first inservice inspection of the SGs. In addition, inspect 50% of the tubes by the refueling outage nearest the midpoint of the period and the remaining 50% by the refueling outage nearest the end of the period. No SG shall operate for more than 48 effective full power months or two refueling outages (whichever is less) without being inspected.]

2b. For the Unit 1 model Delta-76 steam generators (Alloy 690 thermally treated) inspect 100% of the tubes at sequential periods of 144, 108, 72, and, thereafter, 60 effective full power months. The first sequential period shall be considered to begin after the first inservice inspection of the SGs. In addition, inspect 50% of the tubes by the refueling outage nearest the midpoint of the period and the remaining 50% by the refueling outage nearest the end of the period. No SG shall operate for more than 72 effective full power months or three refueling outages (whichever is less) without being inspected.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-19c Amendment No.

TXX-05182 Attachment 4 Page 21 of 24 Programs and Manuals 5.5 5.5 Programs and Manuals (continued) 5.5.9.2 Unit I model D76 and Unit 2 model D5 Steam Generator (SG) Program (continued)

3. If crack indications are found in any SG tube, then the next inspection for each SG for the degradation mechanism that caused the crack indication shall not exceed 24 effective full power months or one refueling outage (whichever is less). If definitive information, such as from examination of a pulled tube, diagnostic non-destructive testing, or engineering evaluation indicates that a crack-like Indication is not associated with a crack(s), then the indication need not be treated as a crack.

e. Provisions for monitoring operational primary to secondary LEAKAGE.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-1 9d Amendment No.

TXX-05182 Attachment 4 Page 22 of 24 Programs and Manuals 5.6 5.6 Reporting Requirements (continued) 5.6.7 Not used 5.6.8 PAM Reort When a report is required by the required actions of LCO 3.3.3, 'Post Accident Monitoring (PAM) Instrumentation," a report shall be submitted within the following 14 days. The report shall outline the preplanned alternate method of monitoring, the cause of the inoperability, and the plans and schedule for restoring the instrumentation channels of the Function to OPERABLE status.

5.6.9 Unit I model D76 and Unit 2 model D5 Steam Generator Tube Inspection Report A report shall be submitted within 180 days after the initial entry into MODE 4 following completion of an inspection performed in accordance with the Specification 5.5.9.2, Steam Generator (SG) Program. The report shall include:

a. The scope of inspections performed on each SG,

b. Active degradation mechanisms found,

c. Nondestructive examination techniques utilized for each degradation mechanism,

d. Location, orientation (if linear), and measured sizes (if available) of service induced indications,

e. Number of tubes plugged [or repaired] during the inspection outage for each active degradation mechanism,

f. Total number and percentage of tubes plugged to date, and

9. The results of condition monitoring, including the results of tube pulls and in-situ testing, (continued)

COMANCHE PEAK - UNITS 1 AND 2 5.0-36 Amendment No.

TXX-05182 Attachment 4 Page 23 of 24 Programs and Manuals 5.6 5.6 Reporting Requirements (continued) 5.6.10 Unit I model D4 Steam Generator Tube Inspection Report

a. Within 15 days following the completion of each inservice inspection of steam generator tubes, the number of tubes plugged, repaired or designated as an F* tube in each steam generator shall be reported to the Commission;

b. The complete results of the steam generator tube inservice inspection shall be submitted to the Commission in a report within 12 months following the completion of the inspection. This report shall include:

1) Number and extent of tubes and (for Unit 1 only) sleeves inspected,

2) Location and percent of wall-thickness penetration for each indication of an imperfection, and

3) Identification of tubes plugged or repaired.

c. Results of steam generator tube inspections which fall into Category C-3 shall be reported to the Commission in a report within 30 days and prior to resumption of plant operation. This report shall provide a description of investigations conducted to determine cause of the tube degradation and corrective measures taken to prevent recurrence.

(continued)

COMANCHE PEAK - UNITS I AND 2 5.0-36a Amendment No.

TXX-05182 Attachment 4 Page 24 of 24 Programs and Manuals 5.6 5.6 Reporting Requirements (continued) 5.6.10 Unit 1 model D4 Steam Generator Tube Inspection Report (continued)

d. For implementation of the voltage based repair criteria to tube support plate intersections, notify the staff prior to returning the steam generators to service should any of the following conditions arise:

1. If estimated leakage based on the projected end-of-cycle (or if not practical, using the actual measured end-of-cycle) voltage distribution exceeds the leakage limit (determined from the licensing basis dose calculation for the postulated main steam line break) for the next operating cycle.

2. If circumferential crack-like indications are detected at the tube support plate intersections.

3. If indications are identified that extend beyond the confines of the tube support plate.

4. If indications are identified at the tube support plate elevations that are attributable to primary water stress corrosion cracking.

5. If the calculated conditional burst probability based on the projected end-of-cycle (or if not practical, using the actual measured end-of-cycle) voltage distribution exceeds 1 x 10-2, notify the NRC and provide an assessment of the safety significance of the occurrence.

COMANCHE PEAK- UNITS 1 AND 2 5.0-36b Amendment No.

ATTACHMENT 5 to TXX-05182 RETYPED TECHNICAL SPECIFICATION BASES PAGES Pages B ii B 3.4-21 B 3.4-25 B 3.4-31 B 3.4-36 B 3.4-80 B 3.4-81 B 3.4-82 B 3.4-83 B 3.4-84 B 3.4-85 B 3.4-107 B 3.4-108 B 3.4-109 B 3.4-110 B 3.4-111 B 3.4-112

TXX-05182 Attachment 5 Page 2 of 18 TABLE OF CONTENTS (continued)

B 3.4 REACTOR COOLANT SYSTEM (RCS) (continued)

B 3.4.6 RCS Loops C MODE 4 ............................................... B 3.4-29 B 3.4.7 RCS Loops C MODE 5, Loops Filled ............................ ................... B 3.4-34 B 3.4.8 RCS Loops C MODE 5, Loops Not Filled ............................................... B 3.4-40 B 3.4.9 Pressurizer ............................................... B 3.4-44 B 3.4.10 Pressurizer Safety Valves ............................................... B 3.4-49 B 3.4.11 Pressurizer Power Operated Relief Valves (PORVs) ..................... ............ B 3.4-54 B 3.4.12 Low Temperature Overpressure Protection (LTOP) System ............. ......... B 3.4-63 B 3.4.13 RCS Operational LEAKAGE ............................................... B 3.4-79 B 3.4.14 RCS Pressure Isolation Valve (PIV) Leakage ............................................. B 3.4-86 B 3.4.15 RCS Leakage Detection Instrumentation ............................................... B 3.4-93 B 3.4.16 RCS Specific Activity ............................................... B 3.4-101 B 3.4.17 Steam Generator (SG) Tube Integrity ................................................ B.3.4-107 B 3.5 EMERGENCY CORE COOLING SYSTEMS (ECCS) ................................. B 3.5-1 B 3.5.1 Accumulators ............................................... B 3.5-1 B 3.5.2 ECCS COperating ............................................... B 3.5-10 B 3.5.3 ECCS CShutdown ............................................... B 3.5-23 B 3.5.4 Refueling Water Storage Tank (RWST) ............................................... B 3.5-28 B 3.5.5 Seal Injection Flow ............................................... B 3.5-36 B 3.6 CONTAINMENT SYSTEMS ............................................... B 3.6-1 B 3.6.1 Containment ............................................... B 3.6-1 B 3.6.2 Containment Air Locks............................................... B 3.6-5 B 3.6.3 Containment Isolation Valves ............... ................................ B 3.6-13 B 3.6.4 Containment Pressure ............................................... B 3.6-31 B 3.6.5 Containment Air Temperature ............... ................................ B 3.6-34 B 3.6.6 Containment Spray System ............................................... B 3.6-38 B 3.6.7 Spray Additive System ............................................... B 3.6-46 B 3.6.8 Hydrogen Recombiners ............................................... B 3.6-52 B 3.7 PLANT SYSTEMS ............................................... B 3.7-1 B 3.7.1 Main Steam Safety Valves (MSSVs) ............................ ................... B 3.7-1 B 3.7.2 Main Steam Isolation Valves (MSIVs) ................................. .............. B 3.7-9 B 3.7.3 Feedwater Isolation Valves (FlVs) and Associated Bypass Valves ............ B 3.7-15 B 3.7.4 Steam Generator Atmospheric Relief Valves (ARVs) ..................... ............ B 3.7-21 B 3.7.5 Auxiliary Feedwater (AFW) System ............................................... B 3.7-26 B 3.7.6 Condensate Storage Tank (CST) ............................................... B 3.7-35 B 3.7.7 Component Cooling Water (CCW) System ............................................... B 3.7-39 B 3.7.8 Station Service Water System (SSWS) ............................................... B 3.7-44 B 3.7.9 Ultimate Heat Sink (UHS) ............................................... B 3.7-50 (continued)

COMANCHE PEAK- UNITS 1AND 2 B ii Revision

TXX-05182 Attachment 5 Page 3 of 18 RCS Loops-MODES 1 and 2 B 3.4.4 BASES (continued)

LCO The purpose of this LCO is to require an adequate forced flow rate for core heat removal. Flow is represented by the number of RCPs in operation for removal of heat by the SGs. To meet safety analysis acceptance criteria for DNB, four pumps are required to be in operation at power.

An OPERABLE RCS loop consists of an OPERABLE RCP in operation providing forced flow for heat transport and an OPERABLE SG. An RCP is OPERABLE if it is capable of being powered and is able to provide forced flow.

APPLICABILITY In MODES I and 2, the reactor is critical and thus has the potential to produce maximum THERMAL POWER. Thus, to ensure that the assumptions of the accident analyses remain valid, all RCS loops are required to be OPERABLE and in operation in these MODES to prevent DNB and core damage.

The decay heat production rate is much lower than the full power heat rate. As such, the forced circulation flow and heat sink requirements are reduced for lower, noncritical MODES as indicated by the LCOs for MODES 3, 4, and 5.

Operation in other MODES is covered by:

LCO 3.4.5, "RCS Loops-MODE 3";

LCO 3.4.6, "RCS Loops-MODE 4";

LCO 3.4.7, "RCS Loops -MODE 5, Loops Filled";

LCO 3.4.8, "RCS Loops-MODE 5, Loops Not Filled";

LCO 3.9.5, "Residual Heat Removal (RHR) and Coolant Circulation -

High Water Level" (MODE 6); and LCO 3.9.6, "Residual Heat Removal (RHR) and Coolant Circulation -

Low Water Level" (MODE 6).

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-21 Revision

TXX-05182 Attachment 5 Page 4 of 18 RCS Loops -MODE 3 B 3.4.5 BASES LCO is validation of the pump coastdown curve used as input to a number of (continued) accident analyses including a loss of flow accident. This test is generally performed in MODE 3 during the initial startup testing program, and as such should only be performed once. If, however, changes are made to the RCS that would cause a change to the flow characteristics of the RCS, the input values of the coastdown curve must be revalidated by conducting the test again.

Utilization of the Note is permitted provided the following conditions are met, along with any other conditions imposed by test procedures:

a. No operations are permitted that would dilute the RCS boron concentration with coolant at boron concentrations less than required to assure the SDM of LCO 3.1.1, thereby maintaining the margin to criticality. Boron dilution with coolant at boron concentrations less than required to assure the SDM is maintained is prohibited because a uniform concentration distribution throughout the RCS cannot be ensured when in natural circulation; and

b. Core outlet temperature is maintained at least 10F below saturation temperature, so that no vapor bubble may form and possibly cause a natural circulation flow obstruction.

An OPERABLE RCS loop consists of one OPERABLE RCP and one OPERABLE SG which has the minimum water level specified in I SR 3.4.5.2. An RCP is OPERABLE if it is capable of being powered and is able to provide forced flow if required.

APPLICABILITY In MODE 3, this LCO ensures forced circulation of the reactor coolant to remove decay heat from the core and to provide proper boron mixing.

The most stringent condition of the LCO, that is, two RCS loops OPERABLE and two RCS loops in operation, applies to MODE 3 with Rod Control System capable of rod withdrawal. The least stringent condition, that is, two RCS loops OPERABLE and one RCS loop in operation, applies to MODE 3 with the Rod Control System not capable of rod withdrawal.

(continued)

COMANCHE PEAK- UNITS 1 AND 2 B 3.4-25 Revision

TXX-05182 Attachment 5 Page 5 of 18 RCS Loops-MODE 4 B 3.4.6 BASES LCO An OPERABLE RCS loop comprises an OPERABLE RCP and an (continued) OPERABLE SG which has the minimum water level specified in I SR 3.4.6.2.

Similarly for the RHR System, an OPERABLE RHR loop comprises an OPERABLE RHR pump capable of providing forced flow to an OPERABLE RHR heat exchanger. RCPs and RHR pumps are OPERABLE if they are capable of being powered and are able to provide forced flow if required.

APPLICABILITY In MODE 4, this LCO ensures forced circulation of the reactor coolant to remove decay heat from the core and to provide proper boron mixing.

One loop of either RCS or RHR provides sufficient circulation for these purposes. However, two loops consisting of any combination of RCS and RHR loops are required to be OPERABLE to meet single failure considerations.

Operation in other MODES is covered by:

LCO 3.4.4, "RCS Loops-MODES 1 and 2";

LCO 3.4.5, "RCS Loops-MODE 3";

LCO 3.4.7, "RCS Loops-MODE 5, Loops Filled";

LCO 3.4.8, "RCS Loops- MODE 5, Loops Not Filled";

LCO 3.9.5, "Residual Heat Removal (RHR) and Coolant Circulation-High Water Level" (MODE 6); and LCO 3.9.6, "Residual Heat Removal (RHR) and Coolant Circulation-Low Water Level" (MODE 6).

ACTIONS A.1 and A.2 If one required loop is inoperable, redundancy for heat removal is lost.

Action must be initiated to restore a second RCS or RHR loop to OPERABLE status. The immediate Completion Time reflects the importance of maintaining the availability of two paths for heat removal.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B3.4-31 Revision

TXX-05182 Attachment 5 Page 6 of 18 RCS Loops -MODE 5, Loops Filled B 3.4.7 BASES LCO Utilization of Note 1 is permitted provided the following conditions are (continued) met, along with any other conditions imposed by test procedures:

a. No operations are permitted that would dilute the RCS boron concentration with coolant at boron concentrations less than required to assure the SDM of LCO 3.1.1, thereby maintaining the margin to criticality. Boron dilution with coolant at boron concentrations less than required to assure the SDM is maintained is prohibited because a uniform concentration distribution throughout the RCS cannot be ensured when in natural circulation; and

b. Core outlet temperature is maintained at least 10OF below saturation temperature, so that no vapor bubble may form and possibly cause a natural circulation flow obstruction.

Note 2 allows one RHR loop to be inoperable for a period of up to 2 hours2.314815e-5 days 5.555556e-4 hours 3.306878e-6 weeks 7.61e-7 months , provided that the other RHR loop is OPERABLE and in operation. This permits periodic surveillance tests to be performed on the inoperable loop during the only time when such testing is safe and possible.

Note 3 requires that the secondary side water temperature of each SG be

< 50OF above each of the RCS cold leg temperatures before the start of a reactor coolant pump (RCP) with an RCS cold leg temperature < 350 0F.

This restriction is to prevent a low temperature overpressure event due to a thermal transient when an RCP is started.

Note 4 provides for an orderly transition from MODE 5 to MODE 4 during a planned heatup by permitting removal of RHR loops from operation when at least one RCS loop is in operation. This Note provides for the transition to MODE 4 where an RCS loop is permitted to be in operation and replaces the RCS circulation function provided by the RHR loops.

RHR pumps are OPERABLE if they are capable of being powered and are able to provide flow if required. An OPERABLE SG can perform as a heat sink via natural circulation when it has an adequate water level and is OPERABLE.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-36 Revision

TXX-05182 Attachment 5 Page 7 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

APPLICABLE This LCO deals with protection of the reactor coolant pressure boundary SAFETY (RCPB) from degradation and the core from inadequate cooling, in ANALYSES addition to preventing the accident analyses radiation release assumptions from being exceeded. The consequences of violating this LCO include the possibility of a loss of coolant accident (LOCA). Except for primary to secondary LEAKAGE, the safety analyses do not address operational LEAKAGE. However, other operational LEAKAGE is related to the safety analyses for LOCA; the amount of leakage can affect the probability of such an event. The safety analysis for an event resulting in steam discharge to the atmosphere assumes that primary to secondary LEAKAGE from all steam generators (SGs) is one gallon per minute or increases to one gallon per minute as a result of accident induced conditions. The LCO requirement to limit primary to secondary LEAKAGE through any one SG to less than or equal to 150 gallons per day is significantly less than the conditions assumed in the safety analysis.

Primary to secondary LEAKAGE is a factor in the dose releases outside containment resulting from a steam line break (SLB) accident. To a lesser extent, other accidents or transients involve secondary steam release to the atmosphere, such as a steam generator tube rupture (SGTR). The leakage contaminates the secondary fluid.

The FSAR (Ref. 3) analysis for SGTR assumes the secondary fluid is released to the atmosphere via the atmospheric relief valves on the affected steam generator. This valve is assumed to fail to close. The release continues until the reactor operators close the associated block valve. The 1 gpm primary to secondary LEAKAGE safety analysis assumption is relatively inconsequential.

The safety analysis for the SLB accident assumes the entire primary to secondary LEAKAGE is through the affected generator as an initial condition. The dose consequences resulting from the SLB accident are within the limits defined in 10 CFR 100 (Ref. 6) as described in the accident analyses (Ref. 3).

The safety analysis for RCS main loop piping for GDC-4 (Ref. 1)assumes 1 gpm unidentified leakage and monitoring per RG 1.45 (Ref. 2) are maintained (Ref. 4 and 5).

The RCS operational LEAKAGE satisfies Criterion 2 of 10CFR50.36(c)(2)(ii).

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-80 Revision

TXX-05182 Attachment 5 Page 8 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

LCO RCS operational LEAKAGE shall be limited to:

a. Pressure Boundary LEAKAGE No pressure boundary LEAKAGE is allowed, being indicative of material deterioration. LEAKAGE of this type is unacceptable as the leak itself could cause further deterioration, resulting in higher LEAKAGE. Violation of this LCO could result in continued degradation of the RCPB. LEAKAGE past seals and gaskets is not pressure boundary LEAKAGE. Seals and gaskets include the canopy seals downstream of ACME threaded connections and Canopy Seal Clamp Assemblies. Therefore, leakage past the canopy seal or CSCAs is not pressure boundary leakage.

b. Unidentified LEAKAGE One gallon per minute (gpm) of unidentified LEAKAGE is allowed as a reasonable minimum detectable amount that the containment air monitoring and Containment Sump Level and Flow Monitoring System can detect within a reasonable time period. Violation of this LCO could result in continued degradation of the RCPB, if the LEAKAGE is from the pressure boundary.

c. Identified LEAKAGE Up to 10 gpm of identified LEAKAGE is considered allowable because LEAKAGE is from known sources that do not interfere with detection of unidentified LEAKAGE and is well within the capability of the RCS Makeup System. Identified LEAKAGE includes LEAKAGE to the containment from specifically known and located sources, but does not include pressure boundary LEAKAGE or controlled reactor coolant pump (RCP) seal leakoff (a normal function not considered LEAKAGE). Violation of this LCO could result in continued degradation of a component or system.

d. The limit of 150 gallons per day per SG is based on the operational LEAKAGE performance criterion in NEI 97-06, Steam Generator Program Guidelines (Ref. 7). The Steam Generator Program operational LEAKAGE performance criterion in NEI 97-06 states, "The RCS operational primary to secondary leakage through any one SG shall be limited to 150 gallons per day." The limit is based on operating experience with SG tube degradation mechanisms that result in tube leakage. The operational leakage rate criterion in conjunction with the implementation of the Steam Generator Program is an effective measure for minimizing the frequency of steam generator tube ruptures.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-81 Revision

TXX-05182 Attachment 5 Page 9 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

APPLICABILITY In MODES 1, 2, 3, and 4, the potential for RCPB LEAKAGE is greatest when the RCS is pressurized.

In MODES 5 and 6, LEAKAGE limits are not required because the reactor coolant pressure is far lower, resulting in lower stresses and reduced potentials for LEAKAGE.

LCO 3.4.14, "RCS Pressure Isolation Valve (PIV) Leakage," measures leakage through each individual PIV and can impact this LCO. Of the two PlVs in series in each isolated line, leakage measured through one PIV does not result in RCS LEAKAGE when the other is leak tight. If both valves leak and result in a loss of mass from the RCS, the loss must be included in the allowable identified LEAKAGE.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-82 Revision

TXX-05182 Attachment 5 Page 10 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

ACTIONS A.1 Unidentified LEAKAGE or identified LEAKAGE in excess of the LCO limits must be reduced to within limits within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months . This Completion Time allows time to verify leakage raies and either identify unidentified LEAKAGE or reduce LEAKAGE to within limits before the reactor must be shut down. This action is necessary to prevent further deterioration of the RCPB.

B.1 and B.2 If any pressure boundary LEAKAGE exists or primary to secondary LEAKAGE is not within limit, or if unidentified or identified LEAKAGE, cannot be reduced to within limits within 4 hours4.62963e-5 days 0.00111 hours 6.613757e-6 weeks 1.522e-6 months , the reactor must be brought to lower pressure conditions to reduce the severity of the LEAKAGE and its potential consequences. It should be noted that LEAKAGE past seals and gaskets is not pressure boundary LEAKAGE.

The reactor must be brought to MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and MODE 5 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months . This action reduces the LEAKAGE and also reduces the factors that tend to degrade the pressure boundary.

The allowed Completion Times are reasonable, based on operating experience, to reach the required plant conditions from full power conditions in an orderly manner and without challenging plant systems.

In MODE 5, the pressure stresses acting on the RCPB are much lower, and further deterioration is much less likely.

(continued)

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-83 Revision

TXX-05182 Attachment 5 Page 11 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

SURVEILLANCE SR 3.4.13.1 REQUIREMENTS Verifying RCS LEAKAGE to be within the LCO limits ensures the integrity of the RCPB is maintained. Pressure boundary LEAKAGE would at first appear as unidentified LEAKAGE and can only be positively identified by inspection. It should be noted that LEAKAGE past seals and gaskets is not pressure boundary LEAKAGE. Unidentified LEAKAGE and identified LEAKAGE are determined by performance of an RCS water inventory balance.

The RCS water inventory balance must be met with the reactor at steady state operating conditions (stable temperature, power level, pressurizer and makeup tank levels, makeup and letdown, and RCP seal injection and return flows). This surveillance is modified by two Notes. Note 1 states that this SR is not required to be performed until 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months after establishing steady state operation near operating pressure. The 12 hour1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months allowance provides sufficient time to collect and process necessary data after stable plant conditions are established.

Steady state operation is required to perform a proper inventory balance since calculations during maneuvering are not useful. For RCS operational LEAKAGE determination by water inventory balance, steady state is defined as stable RCS pressure, temperature (Tang changing by less than 5°F/hour), power level, pressurizer and makeup tank levels, makeup and letdown, and RCP seal injection and return flows. An early warning of pressure boundary LEAKAGE or unidentified LEAKAGE is provided by the automatic systems that monitor the containment atmosphere radioactivity and the containment sump level. It should be noted that LEAKAGE past seals and gaskets is not pressure boundary LEAKAGE. These leakage detection systems are specified in LCO 3.4.15, 'RCS Leakage Detection Instrumentation."

Note 2 states that this SR is not applicable to primary to secondary LEAKAGE because LEAKAGE of 150 gallons per day cannot be measured accurately by an RCS water inventory balance.

The 72 hour8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months Frequency is a reasonable interval to trend LEAKAGE and recognizes the importance of early leakage detection in the prevention of accidents. When non steady state operation precludes surveillance performance, the surveillance should be performed in a reasonable time period commensurate with the surveillance performance length, once steady state operation has been achieved, provided greater than 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months have elapsed since the last performance.

(continued)

COMANCHE PEAK- UNITS 1 AND 2 B 3.4-84 Revision

TXX-05182 Attachment 5 Page 12 of 18 RCS Operational LEAKAGE B 3.4.13 BASES (continued)

SUVEILLANCE SR 3.4.13.2 REQUIREMENTS (continued) This SR verifies that primary to secondary LEAKAGE is less than or equal to 150 gallons per day through any one SG. Satisfying the primary to secondary LEAKAGE limit ensures that the operational LEAKAGE performance criterion in the Steam Generator Program is met. If this SR is not met, the performance criterion is not met and LCO 3.4.17, "Steam Generator Tube Integrity," should be entered. The 150 gallons per day limit is measured at room temperature as described in Reference 8. The operational LEAKAGE rate limit applies to LEAKAGE through any one SG. If it is not practical to assign the LEAKAGE to an individual SG, all the primary to secondary LEAKAGE should be conservatively assumed to be from one SG.

The Surveillance is modified by a Note which states that the Surveillance is not required to be performed until 12 hours1.388889e-4 days 0.00333 hours 1.984127e-5 weeks 4.566e-6 months after establishment of steady state operation. For RCS primary to secondary LEAKAGE determination, steady state is defined as stable RCS pressure, temperature (Tang changing by less than 50F/hour), power level, pressurizer and makeup tank levels, makeup and letdown, and RCP seal injection and return flows.

The Surveillance Frequency of 72 hours8.333333e-4 days 0.02 hours 1.190476e-4 weeks 2.7396e-5 months is a reasonable interval to trend primary to secondary LEAKAGE and recognizes the importance of early leakage detection in the prevention of accidents. The primary to secondary LEAKAGE is determined using continuous process radiation monitors or radiochemical grab sampling in accordance with the EPRI guidelines (Ref. 8).

REFERENCES 1. 10 CFR 50, Appendix A, GDC 4 and 30.

2. Regulatory Guide 1.45, May 1973.

3. FSAR, Section 15.

4. FSAR, Section 3.6B.

5. NUREG-1061, Volume 3, November 1984.

6. 10 CFR 100.

7. NEI 97-06, "Steam Generator Program Guidelines".

8. EPRI, 'Pressurized Water Reactor Primary-to-Secondary Leak Guidelines".

COMANCHE PEAK - UNITS 1 AND 2 B 3.4-85 Revision

TXX-05182 Attachment 5 Page 13 of 18 SG Tube Integrity B 3.4.17 B 3.4 REACTOR COOLANT SYSTEM (RCS)

B 3.4.17 SG Tube Integrity BASES BACKGROUND Steam generator (SG) tubes are small diameter, thin walled tubes that carry primary coolant through the primary to secondary heat exchangers.

The SG tubes have a number of important safety functions. Steam generator tubes are an integral part of the reactor coolant pressure boundary (RCPB) and, as such, are relied on to maintain the primary system's pressure and inventory. The SG tubes isolate the radioactive fission products in the primary coolant from the secondary system. In addition, as part of the RCPB, the SG tubes are unique in that they act as the heat transfer surface between the primary and secondary systems to remove heat from the primary system. This Specification addresses only the RCPB Integrity function of the SG. The SG heat removal function is addressed by LCO 3.4.4, "RCS Loops - MODES 1 and 2," LCO 3.4.5,

'RCS Loops - MODE 3," LCO 3.4.6, 'RCS Loops - MODE 4," and LCO 3.4.7, 'RCS Loops - MODE 5, Loops Filled."

SG tube integrity means that the tubes are capable of performing their intended RCPB safety function consistent with the licensing basis, including applicable regulatory requirements.

Steam generator tubing is subject to a variety of degradation mechanisms. Steam generator tubes may experience tube degradation related to corrosion phenomena, such as wastage, pitting, intergranular attack, and stress corrosion cracking, along with other mechanically induced phenomena such as denting and wear. These degradation mechanisms can impair tube integrity if they are not managed effectively.

The SG performance criteria are used to manage SG tube degradation.

Specification 5.5.9, "Steam Generator (SG) Program," requires that a program be established and implemented to ensure that SG tube integrity is maintained. Pursuant to Specification 5.5.9, tube integrity is maintained when the SG performance criteria are met. There are three SG performance criteria: structural integrity, accident induced leakage, and operational LEAKAGE. The SG performance criteria are described in Specification 5.5.9. Meeting the SG performance criteria provides reasonable assurance of maintaining tube integrity at normal and accident conditions.

The processes used to meet the SG performance criteria are defined by the Steam Generator Program Guidelines (Ref. 1).

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TXX-05182 Attachment 5 Page 14 of 18 SG Tube Integrity B 3.4.17 BASES (continued)

APPLICABLE The steam generator tube rupture (SGTR) accident is the limiting design SAFETY basis event for SG tubes and avoiding an SGTR is the basis for ANALYSES this Specification. The analysis of a SGTR event assumes a bounding primary to secondary LEAKAGE rate equal to the operational LEAKAGE rate limits in LCO 3.4.13, "RCS Operational LEAKAGE," plus the leakage rate associated with a double-ended rupture of a single tube. The accident analysis for a SGTR assumes the contaminated secondary fluid is only briefly released to the atmosphere via safety valves and the majority is discharged to the main condenser.

The analysis for design basis accidents and transients other than a SGTR assume the SG tubes retain their structural integrity (i.e., they are assumed not to rupture.) In these analyses, the steam discharge to the atmosphere is based on the total primary to secondary LEAKAGE from all SGs of 1 gallon per minute or is assumed to increase to 1 gallon per minute as a result of accident induced conditions. For accidents that do not involve fuel damage, the primary coolant activity level of DOSE EQUIVALENT 1-131 is assumed to be equal to the LCO 3.4.16, "RCS Specific Activity," limits. For accidents that assume fuel damage, the primary coolant activity is a function of the amount of activity released from the damaged fuel. The dose consequences of these events are within the limits of GDC 19 (Ref. 2), 10 CFR 100 (Ref. 3) or the NRC approved licensing basis (e.g., a small fraction of these limits).

Steam generator tube integrity satisfies Criterion 2 of 10 CFR 50.36(c)(2)(ii).

LCO The LCO requires that SG tube integrity be maintained. The LCO also requires that all SG tubes that satisfy the repair criteria be plugged or repaired in accordance with the Steam Generator Program.

During an SG inspection, any inspected tube that satisfies the Steam Generator Program repair criteria is repaired or removed from service by plugging. If a tube was determined to satisfy the repair criteria but was not plugged or repaired, the tube may still have tube integrity.

In the context of this Specification, a SG tube is defined as the entire length of the tube, including the tube wall and any repairs made to it, between the tube-to-tubesheet weld at the tube inlet and the tube-to-tubesheet weld at the tube outlet. The tube-to-tubesheet weld is not considered part of the tube.

A SG tube has tube integrity when it satisfies the SG performance criteria.

The SG performance criteria are defined in Specification 5.5.9, WSteam Generator Program," and describe acceptable SG tube performance. The Steam Generator Program also provides the evaluation process for determining conformance with the SG performance criteria.

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TXX-05182 Attachment 5 Page 15 of 18 SG Tube Integrity B 3.4.17 BASES LCO There are three SG performance criteria: structural integrity, accident (continued) induced leakage, and operational LEAKAGE. Failure to meet any one of these criteria is considered failure to meet the LCO.

The structural integrity performance criterion provides a margin of safety against tube burst or collapse under normal and accident conditions, and ensures structural integrity of the SG tubes under all anticipated transients included in the design specification. Tube burst is defined as, "The gross structural failure of the tube wall. The condition typically corresponds to an unstable opening displacement (e.g., opening area increased in response to constant pressure) accompanied by ductile (plastic) tearing of the tube material at the ends of the degradation." Tube collapse is defined as, "For the load displacement curve for a given structure, collapse occurs at the top of the load versus displacement curve where the slope of the curve becomes zero." The structural integrity performance criterion provides guidance on assessing loads that have a significant effect on burst or collapse. In that context, the term 'significant" is defined as 'An accident loading condition other than differential pressure is considered significant when the addition of such loads in the assessment of the structural integrity performance criterion could cause a lower structural limit or limiting burst/collapse condition to be established."

For tube integrity evaluations, except for circumferential degradation, axial thermal loads are classified as secondary loads. For circumferential degradation, the classification of axial thermal loads as primary or secondary loads will be evaluated on a case-by-case basis. The division between primary and secondary classifications will be based on detailed analysis and/or testing.

Structural integrity requires that the primary membrane stress intensity in a tube not exceed the yield strength for all ASME Code,Section III, Service Level A (normal operating conditions) and Service Level B (upset or abnormal conditions) transients included in the design specification.

This includes safety factors and applicable design basis loads based on ASME Code,Section III, Subsection NB (Ref. 4) and Draft Regulatory Guide 1.121 (Ref. 5).

The accident induced leakage performance criterion ensures that the primary to secondary LEAKAGE caused by a design basis accident, other than a SGTR, is within the accident analysis assumptions. The accident analysis assumes that accident induced leakage does not exceed I gpm per SG, except for specific types of degradation at specific locations where the NRC has approved greater accident induced leakage. The accident induced leakage rate includes any primary to secondary LEAKAGE existing prior to the accident in addition to primary to secondary LEAKAGE induced during the accident.

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TXX-05182 Attachment 5 Page 16 of 18 SG Tube Integrity B 3.4.17 BASES LCO The operational LEAKAGE performance criterion provides an observable (continued) indication of SG tube conditions during plant operation. The limit on operational LEAKAGE is contained in LCO 3.4.13, MRCS Operational LEAKAGE," and limits primary to secondary LEAKAGE through any one SG to 150 gallons per day. This limit is based on the assumption that a single crack leaking this amount would not propagate to a SGTR under the stress conditions of a LOCA or a main steam line break. If this amount of LEAKAGE is due to more than one crack, the cracks are very small, and the above assumption is conservative.

APPLICABILITY Steam generator tube integrity is challenged when the pressure differential across the tubes is large. Large differential pressures across SG tubes can only be experienced in MODE 1, 2, 3, or 4.

RCS conditions are far less challenging in MODES 5 and 6 than during MODES 1, 2, 3, and 4. In MODES 5 and 6, primary to secondary differential pressure is low, resulting in lower stresses and reduced potential for LEAKAGE.

ACTIONS The ACTIONS are modified by a Note clarifying that the Conditions may be entered independently for each SG tube. This is acceptable because the Required Actions provide appropriate compensatory actions for each affected SG tube. Complying with the Required Actions may allow for continued operation, and subsequent affected SG tubes are governed by subsequent Condition entry and application of associated Required Actions.

A.1 and A.2 Condition A applies if it is discovered that one or more SG tubes examined in an inservice inspection satisfy the tube repair criteria but were not plugged or repaired in accordance with the Steam Generator Program as required by SR 3.4.17.2. An evaluation of SG tube integrity of the affected tube(s) must be made. Steam generator tube integrity is based on meeting the SG performance criteria described in the Steam Generator Program. The SG repair criteria define limits on SG tube degradation that allow for flaw growth between Inspections while still providing assurance that the SG performance criteria will continue to be met. In order to determine if a SG tube that should have been plugged or repaired has tube integrity, an evaluation must be completed that demonstrates that the SG performance criteria will continue to be met until the next refueling outage or SG tube inspection. The tube integrity determination is based on the estimated condition of the tube at the time the situation is discovered and the estimated growth of the degradation prior to the next SG tube inspection. If it is determined that tube integrity is not being maintained, Condition B applies.

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TXX-05182 Attachment 5 Page 17 of 18 SG Tube Integrity B 3.4.17 BASES ACTIONS A Completion Time of 7 days is sufficient to complete the evaluation while (continued) minimizing the risk of plant operation with a SG tube that may not have tube integrity.

If the evaluation determines that the affected tube(s) have tube integrity, Required Action A.2 allows plant operation to continue until the next refueling outage or SG inspection provided the inspection interval continues to be supported by an operational assessment that reflects the affected tubes. However, the affected tube(s) must be plugged or repaired prior to entering MODE 4 following the next refueling outage or SG inspection. This Completion Time is acceptable since operation until the next inspection is supported by the operational assessment.

B.1 and B.2 If the Required Actions and associated Completion Times of Condition A are not met or if SG tube integrity is not being maintained, the reactor must be brought to MODE 3 within 6 hours6.944444e-5 days 0.00167 hours 9.920635e-6 weeks 2.283e-6 months and MODE 5 within 36 hours4.166667e-4 days 0.01 hours 5.952381e-5 weeks 1.3698e-5 months .

The allowed Completion Times are reasonable, based on operating experience, to reach the desired plant conditions from full power conditions in an orderly manner and without challenging plant systems.

SURVEILLANCE SR 3.4.17.1 REQUIREMENTS During shutdown periods the SGs are inspected as required by this SR and the Steam Generator Program. NEI 97-06, Steam Generator Program Guidelines (Ref. 1), and its referenced EPRI Guidelines, establish the content of the Steam Generator Program. Use of the Steam Generator Program ensures that the inspection is appropriate and consistent with accepted industry practices.

During SG inspections a condition monitoring assessment of the SG tubes is performed. The condition monitoring assessment determines the Has found" condition of the SG tubes. The purpose of the condition monitoring assessment is to ensure that the SG performance criteria have been met for the previous operating period.

The Steam Generator Program determines the scope of the inspection and the methods used to determine whether the tubes contain flaws satisfying the tube repair criteria. Inspection scope (i.e., which tubes or areas of tubing within the SG are to be inspected) is a function of existing and potential degradation locations. The Steam Generator Program also specifies the inspection methods to be used to find potential degradation.

Inspection methods are a function of degradation morphology, non-destructive examination (NDE) technique capabilities, and inspection locations.

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TXX-05182 Attachment 5 Page 18 of 18 SG Tube Integrity B 3.4.17 BASES (continued)

SUVEILLANCE The Steam Generator Program defines the Frequency of SR 3.4.17.1. The REQUIREMENTS Frequency is determined by the operational assessment and other limits in (continued) the SG examination guidelines (Ref. 6). The Steam Generator Program uses information on existing degradations and growth rates to determine an inspection Frequency that provides reasonable assurance that the tubing will meet the SG performance criteria at the next scheduled inspection. In addition, Specification 5.5.9 contains prescriptive requirements concerning inspection intervals to provide added assurance that the SG performance criteria will be met between scheduled inspections.

SR 3.4.17.2 During an SG inspection, any inspected tube that satisfies the Steam Generator Program repair criteria is repaired or removed from service by plugging. The tube repair criteria delineated in Specification 5.5.9 are intended to ensure that tubes accepted for continued service satisfy the SG performance criteria with allowance for error in the flaw size measurement and for future flaw growth. In addition, the tube repair criteria, in conjunction with other elements of the Steam Generator Program, ensure that the SG performance criteria will continue to be met until the next inspection of the subject tube(s). Reference 1 provides guidance for performing operational assessments to verify that the tubes remaining in service will continue to meet the SG performance criteria.

Steam generator tube repairs are only performed using approved repair methods as described in the Steam Generator Program.

The Frequency of prior to entering MODE 4 following a SG inspection ensures that the Surveillance has been completed and all tubes meeting the repair criteria are plugged or repaired prior to subjecting the SG tubes to significant primary to secondary pressure differential.

REFERENCES 1. NEI 97-06, uSteam Generator Program Guidelines."

2. 10 CFR 50 Appendix A, GDC 19.

3. 10 CFR 100.

4. ASME Boiler and Pressure Vessel Code,Section III, Subsection NB.

5. Draft Regulatory Guide 1.121, 'Basis for Plugging Degraded Steam Generator Tubes," August 1976.

6. EPRI, "Pressurized Water Reactor Steam Generator Examination Guidelines."

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v t e Letter Sequence Request
TAC:MC9498, Steam Generator Tube Integrity (Approved, Closed)
Initiation Request Acceptance... Administration Questions Answers 7 June 2006 Results Approval, Approval Other: ML060450538
MONTHYEAR2006-02-14 [Table View]

ML053620367

Text

SUBJECT:

Dear Sir or Madam:

1.0 DESCRIPTION

2.0 PROPOSED CHANGE

3.0 BACKGROUND

4.0 TECHNICAL ANALYSIS

5.0 REGULATORY ANALYSIS

6.0 ENVIRONMENTAL CONSIDERATION

8.0 REFERENCES

1.0 DESCRIPTION

2.0 PROPOSED CHANGE

3.0 BACKGROUND

4.0 TECHNICAL ANALYSIS

5.0 REGULATORY ANALYSIS

6.0 ENVIRONMENTAL CONSIDERATION

8.0 REFERENCES

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