NL-09-1803, Response to NRC Generic Letter 2008-01, Response to Requests for Additional Information: Difference between revisions

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{{#Wiki_filter:Southern Nucieat Operating Company, Inc SOUTHERN A COMPANY December 14, 2009 Docket 50-321 U. S. Nuclear Regulatory ATTN: Document Control Washington, D. C.
{{#Wiki_filter:Southern Nucieat Operating Company, Inc SOUTHERN COMPANY A
Edwin I. Hatch Nuclear Response to NRC Generic Letter Response to Requests for Additional Ladies and Gentlemen:
December 14, 2009 Docket Nos.:      50-321                                             NL-09-1B03 50-366 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Response to NRC Generic Letter 200B-01 Response to Requests for Additional Information Ladies and Gentlemen:
On October 10, 200B (NL-OB-1340)
On October 10, 200B (NL-OB-1340) SNC submitted the nine-month response to Generic Letter 2008-01 and on August 24, 2009 (NL-09-1 067) SNC submitted for the Edwin I Hatch Nuclear Plant(HNP) Unit 2 post-outage response to Nuclear Regulatory Commission (NRC) Generic Letter 2008-01. In a letter dated November 5, 2009 the NRC submitted a request for additional information concerning the latter response referenced above. The requested response date was 45 days from the calendar date of the letter.
SNC submitted the nine-month response Generic Letter 2008-01 and on August 24, 2009 (NL-09-1 067) SNC submitted for Edwin I Hatch Nuclear Plant(HNP)
The enclosure to this letter contains the SNC response to the referenced NRC request for additional information.
Unit 2 post-outage response to Regulatory Commission (NRC) Generic Letter 2008-01. In a letter dated 5, 2009 the NRC submitted a request for additional information concerning the response referenced above. The requested response date was 45 days from calendar date of the The enclosure to this letter contains the SNC response to the referenced request for additional This letter contains an NRC commitment.
This letter contains an NRC commitment.
u.s Nuclear Regulat01Y Page Mr. M. J. Ajluni states he is Nuclear Licensing Manager of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and to the best of his knowledge and belief, the facts set forth in this letter are true. If you have any questions, please advise. Sincerely, M. J. Manager, Nuclear Sworn to and subscribed before me this -LL day of  
 
,2009.
u.s Nuclear Regulat01Y Commission NL-09-J803 Page 2 Mr. M. J. Ajluni states he is Nuclear Licensing Manager of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and to the best of his knowledge and belief, the facts set forth in this letter are true.
Notary Public My commission expires: ///0 t.//J.o13 MJA/PAHliac  
If you have any questions, please advise.
Sincerely,
  ~~~
M. J. Ajluni Manager, Nuclear Licensing Sworn to and subscribed before me this   -LL day of f1u,~              ,2009.
~oJf~~ Notary Public My commission expires:     ///0 t.//J.o13 MJA/PAHliac


==Enclosures:==
==Enclosures:==
: 1. RAI Responses to NRC. 2. Regulatory Commitment for Submitting TS Change after TSTF Approval by NRC. 3. Attachments 1,2, and 6 of 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems."
: 1. RAI Responses to NRC.
U.S Nuclear Regulatory Commission NL-09-1803 Page 3 Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. D. R. Madison, Vice President Hatch Ms. P. M. Marino, Vice President Engineering RTYPE: CHA02.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Ms. D. N. Wright, NRR Project Manager Hatch Mr. E. D. Morris, Senior Resident Inspector  
: 2. Regulatory Commitment for Submitting TS Change after TSTF Approval by NRC.
-Hatch Edwin I Hatch Nuclear Response to NRC Generic letter Response to Requests for Additional Enclosure RAI Responses to Enclosure RAJ Responses to REQUEST FOR ADDITIONAL Guidance on Nuclear Regulatory Commission (NRC) staff expectations is provided by Reference 1 which is generally consistent with Nuclear Energy Institute (NEI) guidance provided to industry in Reference 2 as clarified in later NEI communications.
: 3. Attachments 1,2, and 6 of 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems."
The NRC staff recommends that the licensee consult Reference 1 when responding to the following RAls: 1. Provide a regulatory commitment and a schedule for applying the Technical Specification Task Force (TSTF) process to any Technical Specification (TS) changes resulting from GL 2008-01. Response:
 
SNC has provided a regulatory commitment in Enclosure 2 to review any TSTF issued by the NRC concerning gas intrusion.
U.S Nuclear Regulatory Commission NL-09-1803 Page 3 cc:  Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. D. R. Madison, Vice President Hatch Ms. P. M. Marino, Vice President Engineering RTYPE: CHA02.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Ms. D. N. Wright, NRR Project Manager Hatch Mr. E. D. Morris, Senior Resident Inspector - Hatch
SNC will either submit a technical specification change based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.
 
Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to Requests for Additional Information Enclosure 1 RAI Responses to NRC
 
Enclosure I RAJ Responses to NRC REQUEST FOR ADDITIONAL INFORMATION Guidance on Nuclear Regulatory Commission (NRC) staff expectations is provided by Reference 1 which is generally consistent with Nuclear Energy Institute (NEI) guidance provided to industry in Reference 2 as clarified in later NEI communications. The NRC staff recommends that the licensee consult Reference 1 when responding to the following RAls:
: 1. Provide a regulatory commitment and a schedule for applying the Technical Specification Task Force (TSTF) process to any Technical Specification (TS) changes resulting from GL 2008-01.
Response: SNC has provided a regulatory commitment in Enclosure 2 to review any TSTF issued by the NRC concerning gas intrusion. SNC will either submit a technical specification change based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.
: 2. SNC letter dated August 24, 2009 states that the procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" was implemented on November 19, 2008. The NRC staff requests the following additional information relative to this procedure:
: 2. SNC letter dated August 24, 2009 states that the procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" was implemented on November 19, 2008. The NRC staff requests the following additional information relative to this procedure:
a) Summarize the monitored locations along with the associated surveillance methods: Response:
a) Summarize the monitored locations along with the associated surveillance methods:
Details for monitoring method and frequency along with point details for each monitoring location are provided in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure
Response: Details for monitoring method and frequency along with point details for each monitoring location are provided in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure 3.
: 3. b) Discuss the surveillance intervals for the monitored locations, including justifications for surveillance intervals greater than a month; Response:
b) Discuss the surveillance intervals for the monitored locations, including justifications for surveillance intervals greater than a month; Response: The applicable system piping was reviewed as per Generic Letter 2008-01 and critical locations were identified where voids could accumulate and the venting process could be challenged. The review concluded that none of the critical locations have active gas accumulation mechanisms.
The applicable system piping was reviewed as per Generic Letter 2008-01 and critical locations were identified where voids could accumulate and the venting process could be challenged.
The Hatch Monitoring Program is focused around these critical locations. The monitoring takes credit for the monthly activity that is performed by Operations as per the Technical Specification surveillance for venting of ECCS systems. The program also takes credit for dynamic flushing that occurs as a result of the quarterly ECCS flow surveillances. All of the monitored locations are vented or dynamically flushed anytime that the section of piping is drained such as for maintenance activities. Confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.
The review concluded that none of the critical locations have active gas accumulation mechanisms.
The surveillance intervals for the monitored locations are contained in Attachments 1 and 2 of Enclosure 3. Justification for frequencies longer than monthly are based on the lack of an active gas accumUlation mechanism, dynamic flushing as a result of quarterly flow surveillances, and confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.
The Hatch Monitoring Program is focused around these critical locations.
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The monitoring takes credit for the monthly activity that is performed by Operations as per the Technical Specification surveillance for venting of ECCS systems. The program also takes credit for dynamic flushing that occurs as a result of the quarterly ECCS flow surveillances.
 
All of the monitored locations are vented or dynamically flushed anytime that the section of piping is drained such as for maintenance activities.
Enclosure 1 RAI Responses to NRC Procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" provides an allowance to modify this frequency based on the results of previous gas monitoring results. If a void is identified during the routine monitoring, the frequency is evaluated to determine if an increase (or shorter monitoring period) is warranted.
Confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.
The surveillance intervals for the monitored locations are contained in Attachments 1 and 2 of Enclosure
: 3. Justification for frequencies longer than monthly are based on the lack of an active gas accumUlation mechanism, dynamic flushing as a result of quarterly flow surveillances, and confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.
E1-1 Enclosure RAI Responses to Procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" provides an allowance to modify this frequency based on the results of previous gas monitoring results. If a void is identified during the routine monitoring, the frequency is evaluated to determine if an increase (or shorter monitoring period) is warranted.
c) Provide the surveillance criteria.
c) Provide the surveillance criteria.
The surveillance acceptance criteria are specified in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure
The surveillance acceptance criteria are specified in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure 3.
: 3. d) Discuss actions to be taken if surveillance criteria are not met. Response:
d) Discuss actions to be taken if surveillance criteria are not met.
Plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," requires that for any identified voids that exceed the allowable size, a condition report is initiated and the Operations Shift Manager and/or the Shift Supervisor is immediately notified.
Response: Plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," requires that for any identified voids that exceed the allowable size, a condition report is initiated and the Operations Shift Manager and/or the Shift Supervisor is immediately notified. If any voids are identified at any monitoring point that does not have an approved maximum allowable limit, either a formal evaluation will be performed or the void will be removed by venting or flushing. The impact on system operability will be addressed as a result of normal processing of the condition report by the on-shift operations personnel. In addition, Engineering personnel are immediately notified to perform an evaluation.
If any voids are identified at any monitoring point that does not have an approved maximum allowable limit, either a formal evaluation will be performed or the void will be removed by venting or flushing.
e) State whether all voids identified will be quantified, recorded, and entered into the Corrective Action Program (CAP).
The impact on system operability will be addressed as a result of normal processing of the condition report by the on-shift operations personnel.
Response: Per plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," all identified voids, including the measured size, are recorded in a data package and a condition report generated to enter the information into the Corrective Action Program.
In addition, Engineering personnel are immediately notified to perform an evaluation.
: 3. Describe any process improvements made to guard against gas intrusion due to inadvertent draining, system realignments, incorrect maintenance procedures, or other evolutions.
e) State whether all voids identified will be quantified, recorded, and entered into the Corrective Action Program (CAP). Response:
Per plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," all identified voids, including the measured size, are recorded in a data package and a condition report generated to enter the information into the Corrective Action Program. 3. Describe any process improvements made to guard against gas intrusion due to inadvertent draining, system realignments, incorrect maintenance procedures, or other evolutions.
Plant evolutions involving system re-alignment or specific component manipulation that could result in inadvertent draining or inadvertent gas intrusion are controlled by plant procedures and performed only by trained plant staff. This includes system draining, tagouts, and system restoration fill and vent activities.
Plant evolutions involving system re-alignment or specific component manipulation that could result in inadvertent draining or inadvertent gas intrusion are controlled by plant procedures and performed only by trained plant staff. This includes system draining, tagouts, and system restoration fill and vent activities.
The HNP plant procedures applicable to these evolutions (Operations, Maintenance, and Instrument and Controls) were independently reviewed for improvements that could be made to address issues related to Generic Letter 2008-01. The review included such areas as vent scope, proper system vent sequence, precautions and limitations, potential gas accumulation mechanisms, documentations of voids identified, etc. From this review, resulting recommendations were evaluated by the plant staff and incorporated into the procedures as deemed appropriate.
The HNP plant procedures applicable to these evolutions (Operations, Maintenance, and Instrument and Controls) were independently reviewed for improvements that could be made to address issues related to Generic Letter 2008-01. The review included such areas as vent scope, proper system vent sequence, precautions and limitations, potential gas accumulation mechanisms, documentations of voids identified, etc. From this review, resulting recommendations were evaluated by the plant staff and incorporated into the procedures as deemed appropriate.
Simplified piping elevation drawings were created as aids to be used by Operations and Engineering personnel to develop vent and/or ultrasonic testing (UT) plans. E1-2 Enclosure RAI Responses to Additional vents have been added in Hatch Unit 2 piping locations that were determined not to have adequate venting capability.
Simplified piping elevation drawings were created as aids to be used by Operations and Engineering personnel to develop vent and/or ultrasonic testing (UT) plans.
Vents will be added to Hatch Unit 1 in similar locations during the Spring 2010 refueling outage. Operations, maintenance, and engineering personnel have been trained on the issues related to gas accumulation, including the potential causes and impact. This training also included the procedural changes described above. 4. Training was not identified in the GL but is considered to be a necessary part of applying procedures and other activities when addressing the issues identified in the GL Briefly discuss training.
E1-2
Response:
 
Training on Gas Accumulation and Management has been provided into the HNP continuing training process and provided to Operations and Maintenance personnel as part of the response to INPO SER 02-05, "Gas Intrusion in Safety Systems." This training focused on the potential for gas accumulation mechanisms and negative impact of voiding on system performance and reliability.
Enclosure 1 RAI Responses to NRC Additional vents have been added in Hatch Unit 2 piping locations that were determined not to have adequate venting capability. Vents will be added to Hatch Unit 1 in similar locations during the Spring 2010 refueling outage.
Several Operations and Engineering procedures have been developed or revised as a result of the response activities to Generic Letter 2008-01. When any station procedure is modified, an assessment for training needs and change management is required in accordance with HNP procedure DI-TRN-61-1006, "Training Request Worksheet." In addition, selected site personnel have been trained and qualified on the use of UT equipment to perform void detection.
Operations, maintenance, and engineering personnel have been trained on the issues related to gas accumulation, including the potential causes and impact. This training also included the procedural changes described above.
SNC is an active participant in the NEI Gas Accumulation Team, which is currently coordinating with the Institute of Nuclear Power Operations in the development of generic training modules for gas accumulation and management.
: 4. Training was not identified in the GL but is considered to be a necessary part of applying procedures and other activities when addressing the issues identified in the GL Briefly discuss training.
These training modules target the Engineering, Operations, and Maintenance disciplines.
Response: Training on Gas Accumulation and Management has been provided into the HNP continuing training process and provided to Operations and Maintenance personnel as part of the response to INPO SER 02-05, "Gas Intrusion in Safety Systems." This training focused on the potential for gas accumulation mechanisms and negative impact of voiding on system performance and reliability.
The first module has been received by HNP and will be evaluated in the first quarter of 2010 for incorporation into the site personnel training processes in a version tailored to meet the station needs as per 61-1006, "Training RequestWorksheef." As the remainder of the training modules are completed and become available to the industry, SNC will evaluate them for applicability to HNP. Pending release of remaining products.
Several Operations and Engineering procedures have been developed or revised as a result of the response activities to Generic Letter 2008-01. When any station procedure is modified, an assessment for training needs and change management is required in accordance with HNP procedure DI-TRN-61-1006, "Training Request Worksheet."
the schedule for such planned training has not yet been determined.
In addition, selected site personnel have been trained and qualified on the use of UT equipment to perform void detection.
REFERENCES Ruland, William H., "Preliminary Assessment of Responses to Generic Letter 2008-01, Managing Gas Accumulation in emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, i and Future NRC Staff Review Plans," NRC letter to James H. Riley, Nuclear Energy Institute, ML091390637, May 28,2009. Riley, James H., "Generic Letter (GL) 2008-01 , "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Contain Spray Systems Evaluation and 3 Month Response Template," Letter to Administrative Points of Contact from Director, Engineering Nuclear Generation Division, Nuclear Energy Institute, Enclosure 2, "Generic Letter 2008-01 Response Guidance," March 20, 2008. E1-3 Edwin I Hatch Nuclear Response to NRC Generic letter Response to requests for Additional Enclosure Regulatory Enclosure RAJ Responses to NRC Commitment Type Scheduled One-Time Action Completion Date SNC will either submit X Within one year after a technical NRC Issuance specification based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.
SNC is an active participant in the NEI Gas Accumulation Team, which is currently coordinating with the Institute of Nuclear Power Operations in the development of generic training modules for gas accumulation and management. These training modules target the Engineering, Operations, and Maintenance disciplines. The first module has been received by HNP and will be evaluated in the first quarter of 2010 for incorporation into the site personnel training processes in a version tailored to meet the station needs as per DI-TRN 61-1006, "Training RequestWorksheef." As the remainder of the training modules are completed and become available to the industry, SNC will evaluate them for applicability to HNP. Pending release of remaining products. the schedule for such planned training has not yet been determined.
Edwin I Hatch Nuclear Response to NRC Generic letter Response to requests for Additional 2EI\I-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1 , 2 and
REFERENCES
----------------------------------------------------------------------------------Enclosure 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and 6 Monitor Point # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 System 1E11 1 E11 1 E11 1E11 1E11 1 E11 1E11 1E11 1E11 1 E11 1E11 1E11 1 E11 1E11 1E11 1E11 1 E11 1E11 1E11 1E11 1 E11 P&IO H16329 H16329 H16329 H16329 H16329 H16329 H16329 H16330 H16330 H16330 H16330 H16330 H16330 H16330 H16330 H16330 H16329 H16329 H16329 H16329 H16329 Westinghouse One Line DWQ 10036099 10036099 10036099 10036099 10036099 10036099 10036099 10036003 10036003 10036003 10036003 10036003 10036003 10036003 10036003 10036003 10037019 10037019 10037019 10037019 10037019 One Line Location 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 1 2 3 4 5 --------------,-----c------
* Ruland, William H., "Preliminary Assessment of Responses to Generic Letter 2008-01, Managing Gas Accumulation in emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, i and Future NRC Staff Review Plans," NRC letter to James H.
Max Pipe Allowable 00 Pipe 10 Floor Access Monitoring Monitoring Void Size Room Description Vent Valves [in] [in]
Riley, Nuclear Energy Institute, ML091390637, May 28,2009.
Isometric EI Line EI Needs Insulated Method Frequency
* Riley, James H., "Generic Letter (GL) 2008-01 , "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Contain Spray Systems Evaluation and 3 Month Response Template," Letter to Administrative Points of Contact from Director, Engineering Nuclear Generation Division, Nuclear Energy Institute, Enclosure 2, "Generic Letter 2008-01 Response Guidance," March 20, 2008.
[Cu. Ft.] Questions/Comments F067 SOC SYSTEM DRYWELL SUCTION TBD 20.00 19.000 S01286 TBD 156'-6" TBD Y VENT DRAIN TBD FPCHX SYSTEM SPECTACLE FLANGE ROOM FPC SUCTION TBD 8.625 7.981 S00236 158' 186' NONE N UT DRAIN TBD ABOVE PUMP SIDE NE DIAG F006D TBD 20.00 19.000 S01211 95' 106' TBD Y UT DRAIN PUMP SIDE NE DIAG F006B TBD 20.00 19.000 S01259 95' 106' TBD Y UT DRAIN F083 FLUSH TBD SUPPLY SOC TBD 1.050 0.742 SOO060 130' 136'-11" TBD Y VENT DRAIN COMMON SOC TORUS SUCTION TBD 20.00 19.000 123'-4" TBD Y UT DRAIN F008TO F009 SYSTEM F008 IN DRYWELL ACCESS; DRYWELL SOC NONE 20.00 19.000 SOO033 130' 135' NONE Y VENT DRAIN TBD F009 IN DRYWELL F016ACONT ATTACH OUTSIDE MG SET ROOMS 6(3)RX BLDG SPRAY O/B Y 16.00 15.250 SOO037 158' 160' NONE Y VENT MONTH ON om F010 FLUSH SYSTEM ATTACH EAST WALL INTO 6(3)ACCESS SUPPLY Y 4.500 4.026 SOO052 130' 137' SCAFF Y UT DRAIN om F010 FLUSH SYSTEM ATTACH EAST WALL INTO 6(3)ACCESS SUPPLY Y 4.500 4.026 SOO052 130' 137' SCAFF Y UT DRAIN om FLUSHI SYSTEM 6(3)ACCESS TBD 20.00 19.000 S01184 130' 138'-9" TBD Y UT DRAIN TOP OF DRYWELL PUMP SIDE SE DIAG F006A TBD 20.00 19.000 SOO034 95' 97' TBD Y UT DRAIN TBD F006A ON GRATING RHR AHX STEAMCOND UTI DRAINI SE DIAG (CAPPED) TBD 20.00 19.000 SOO036 118' 122'-6" NONE Y FLUSH(1) QUARTER 6(3) BACK CORNER ATTACH INVERTED "U" AT 6(3)SE DIAG UIS F048A Y 20.00 19.000 SOO036 107' 116'-1 " SCAFF Y FLUSH QUARTER CONFLUENCE OF "A" & PUMP SIDE SE DIAG F006C NONE 24.00 22.876 SOO034 107' 113' NONE Y UT DRAIN TBD BEHIND SE DIAG D005A TBD 20.00 19.000 SOO036 95' 104'-1" SCAFF Y FLUSH QUARTER TBD ABOVE MOTORS ON CAP ON COND Y -GOES ATTACH ISO SHOWS VENT AT 193', 6(3)RX BLDG MAKEUP TOINSTR 4.500 4.026 SOO054 185' 193' NONE N VENT MONTH TOP 2" CAN'T BE VENTED -----------FPCHX SYSTEM ATTACH BELOW SPECTACLE 6(3)ROOM TO FPC N 8.625 7.981 SOO054 185' 185' NONE N UT DRAIN F016B TO Y-HARD 146'-SYSTEM 6(3)RX BLDG F021B PIPED 16.00 15.250 S01169 130' 8.5" SCAFF Y UT DRAIN OW F015B TO SYSTEM ATTACH 6(3)ACCESS F0178 NONE 24.00 22.876 SOO039 130' 138'-9" SCAFF Y VENT DRAIN TOP DRYWELL ACCESS OW F3031 COND SYSTEM ATTACH 6(3)ACCESS MAKEUP 1E11F3031 4.500 4.026 130' 136 SCAFF Y UT DRAIN VENT IN DRYWELL ACCESS -------------21 i 22 Enclosure 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Monitor Point # 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 System 1E11 1 E11 1 E11 1 E11 1E21 1E21 1 E21 1 E21 1E21 1E21 1E41 1E41 1E41 1E51 1 E51 1 E51 1E51 1E21 One Line 10037D19 10037D19 10037D19 10037D19 10036D97 10036D97 10036D98 10036D98 10036D98 10036D98 10037DOO 10037DOO 10037DOO 10037D01 10037D01 10037D01 10037D01 10036D97 One Line Location 6 7 8 9 1 2 1 Room NE DIAG NE DIAG NE DIAG NE DIAG SE NE RX RX RX RCIC CSA Attachments 1, 2 and 6 Max Pipe Allowable 00 Pipe 10 Floor Access Monitoring Monitoring Void Size Description Vent Valves [in] [in] Isometric EI LineEI Needs Insulated Method Frequency (Cu. Ft.) Questions/Comments F007B TO C002B N 3.500 3.068 SOO049 87' 93 SCAFF Y FLUSH QUARTER ATTACH 6(3) MAY BE ABLE TO STAND ON PUMP DISCHARGE PIPE SYSTEM CAPONTOPB HX N (R.V. F055B) 14.00 13.250 SOO038 118' 122 NONE Y UTI FLUSH(1) DRAIN/ QUARTER ATTACH 6(3) CAP ON INSIDE TORUS ROOM WALL AT D005B ORIFICE NONE 20.00 19.000 SOO038 96' 104 SCAFF Y FLUSH QUARTER ATTACH 6(3) ABOVE PUMP MOTORS C002B/D DISCHARGE 1 E11 F3028 20.00 19.000 SOO038 107' 116 SCAFF Y UT SYSTEM DRAIN ATTACH 6(3) AT CONFLUENCE OF C002B ANDD CST SUCTION 92'-7 SYSTEM PIPE STUB CAPPED; OPEN F002A NONE 14.00 13.625 SOO073 87' 1/2" SCAFF N UT DRAIN 0.13 F002TOVENT CST SUCTION 92'-7 SYSTEM F002B NONE 14.00 13.625 TBD 87' 1/2" SCAFF N UT DRAIN 0.18 1E21F002B CST SUPPLY F030A TBD 2.375 1.939 S01315 158' 173'-10" TBD N FLUSH CYCLE ATTACH 6(3)
E1-3
CONDENSATE TRANSFER SUPPLY F030B TBD 2.375 1.939 S01312 158' 174'-3" TBD N FLUSH CYCLE ATTACH 6(3) BEHIND P005 PANEL CS A INJ LINE D003A -F005A TBD 10.75 10.020 SOO075 158' 172'-9" TBD N VENT MONTH ATTACH 6(3) OUTSIDE MG SET PLATFORM CS B INJ LINE D003B TO F005B 1E21F013B 10.75 10.020 TBD 158' 172'-9" TBD N VENT MONTH ATTACH 6(3) RWCU HX PLATFORM SYSTEM UTI DRAINI CST SUCTION F3001 16.00 15.5" H16868 119' 123'-0" NONE N FLUSH QUARTER 0.88 SYSTEM TORUS UTI DRAINI SUCTION NONE 16.00 15" H16868 87' 90'-1" NONE N FLUSH(1) QUARTER 0.10 SYSTEM UTI DRAINI DISCHARGE 1E41F3008 14.00 13.00 H16869 123' 123'-6" NONE Y VENT MONTH 4.061 MONTHI ATTACH DISCHARGE NONE 4" 3.624" H16874 114' 123'-11" SCAFF N FLUSH(1) QUARTER 6(3) INNER CATWALK BAY 1 SYSTEM CONDENSATE 93'-6 UTI DRAINI PUMP RETURN NONE 2" 2.067" S01466 87' 7/16" SCAFF N QUARTER FLUSH 0.03 TORUS 89'-8 SYSTEM SUCTION NONE 6" 6.065" H16873 87' 7/8" NONE N UT DRAIN 0.02 SYSTEM DISCHARGE NONE 4" 3.826" H16874 87' 104'-11" SCAFF N UTI FLUSH DRAIN/ QUARTER ATTACH 6(3) SYSTEM INNER CATWALK @ CST SUCTION 1E21F127 14" 13.25" H16121 117' 121'-2" TBD N UT DRAIN 0.73 COLUMN LINES R6-RJ 38 39 
 
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Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to requests for Additional Information Enclosure 2 Regulatory Commitment
-------------------------
 
----------- 2EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and UTOR SYSTEM IN TORUS SOUTHI 40 1E51 H16334 10037001 3i 4) RCIC CST SUCTION NONE 6" 6.065" H16108 87' 108'-7" SCAFF Y FLUSH DRAIN 0.29 SOUTHWEST SYSTEM ATTACH MAY BE REACHED FROM 21(4) 6(3)41 1 E41 H16332 10037000 HPCI DISCHARGE 1E41F3004 14" 12.500" H16869 87' 95'-10" SCAFF N FLUSH DRAIN NEARBY STAIRS SYSTEM ATTACH 43(4) 6(3)42 1E11B H16329 10037019 RHRB DISCHARGE NONE 16" 15.250" H16837 117' 119'-6" NONE Y FLUSH DRAIN NORTHEAST DIAGONAL ---------------------
Enclosure 2 RAJ Responses to NRC NRC Commitment               Type               Scheduled One-Time Action     Completion Date SNC will either submit           X           Within one year after a technical                               NRC Issuance specification based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.
i ----
E2-1
 
Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to requests for Additional Information Enclosure 3 42EI\I-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1 , 2 and 6
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6
                                                        -----           --------                             -,-----                                                               c------   ----------------
Max Pipe                                                                                                                                        Allowable Monitor                Westinghouse One Line                                                  00    Pipe 10                        Floor                Access                        Monitoring            Monitoring                  Void Size Point #  System  P&IO  One Line DWQ Location  Room        Description  Vent Valves          [in]      [in]      Isometric          EI    Line EI    Needs  Insulated                    Method          Frequency                    [Cu. Ft.]  Questions/Comments F067 SOC                                                                                                                                        SYSTEM 1       1E11  H16329  10036099        1   DRYWELL          SUCTION          TBD          20.00  19.000          S01286        TBD      156'-6"    TBD          Y                      VENT              DRAIN                      TBD FPCHX                                                                                                                                                            SYSTEM                                SPECTACLE FLANGE JUST 2        1E11 H16329  10036099        2    ROOM      FPC SUCTION          TBD          8.625    7.981          S00236        158'      186'      NONE          N
                                                                                                                                                                      -----
UT            DRAIN                      TBD      ABOVE FLOOR PUMP SIDE                                                                                                                                          SYSTEM 3        1E11 H16329  10036099        3    NE DIAG            F006D        TBD          20.00  19.000          S01211        95'      106'      TBD          Y                          UT            DRAIN                      TBD PUMP SIDE                                                                                                                                          SYSTEM 4        1E11 H16329   10036099       4    NE DIAG            F006B        TBD          20.00  19.000          S01259        95'      106'      TBD          Y  --------
UT            DRAIN
                                                                                                                                                                                                              --------
TBD F083 FLUSH                                                                                                                                          SYSTEM 5        1E11  H16329  10036099        5      TBD        SUPPLY SOC          TBD          1.050    0.742          SOO060        130'    136'-11"    TBD          Y                      VENT              DRAIN                      TBD    -------
COMMON SOC                                                                                                                                            SYSTEM 6        1E11  H16329  10036099        6    TORUS            SUCTION          TBD          20.00   19.000
                                                                                                      -------
123'-4"    TBD  -----
Y                          UT            DRAIN                      TBD F008TO F009                                                                                                                                          SYSTEM                               F008 IN DRYWELL ACCESS; 7        1E11  H16329  10036099        7  DRYWELL     -----
SOC      NONE          20.00   19.000           SOO033        130'      135'     NONE          Y                     VENT               DRAIN                     TBD     F009 IN DRYWELL F016ACONT                                                                                                                                                                    ATTACH      OUTSIDE MG SET ROOMS 1E11  H16330  10036003        1  RX BLDG        SPRAY O/B            Y          16.00  15.250          SOO037        158'     160'     NONE           Y                      VENT              MONTH                        6(3)    ON FLOOR 8
om          F010 FLUSH                                                                                                                                          SYSTEM                    ATTACH 6(3)
EAST WALL INTO OW 9      1E11  H16330  10036003        2    ACCESS            SUPPLY
                                                                -----
Y          4.500    4.026          SOO052        130'      137'      SCAFF          Y                          UT             DRAIN                               ACCESS om          F010 FLUSH                                                                                                                                          SYSTEM                    ATTACH 6(3)
EAST WALL INTO OW 10      1E11  H16330  10036003        3    ACCESS            SUPPLY          Y          4.500    4.026          SOO052        130'     137'     SCAFF          Y                         UT             DRAIN                             ACCESS QUARTERI om                                                                                                                                          FLUSHI            SYSTEM                    ATTACH 6(3) 11        1E11 H16330  10036003        4    ACCESS                            TBD         20.00  19.000          S01184        130'     138'-9"     TBD           Y                         UT            DRAIN                             TOP OF DRYWELL ACCESS PUMP SIDE                                                                                                                                          SYSTEM 12        1E11 H16330  10036003        5    SE DIAG              F006A        TBD         20.00   19.000           SOO034        95'        97'       TBD           Y                         UT             DRAIN                     TBD      F006A ON GRATING 95' RHR AHX                                                                                                                                          SYSTEM STEAMCOND                                                                                                                            UTI              DRAINI                  ATTACH 10036003        6    SE DIAG          (CAPPED)          TBD        20.00   19.000           SOO036        118'     122'-6"    NONE           Y                   FLUSH(1)          QUARTER                        6(3)   BACK CORNER 118' i
13        1E11 H16330 ATTACH      INVERTED "U" AT 1E11          10036003        7    SE DIAG        UIS F048A          Y         20.00   19.000          SOO036        107'     116'-1 "  SCAFF          Y                    FLUSH           QUARTER                        6(3)   CONFLUENCE OF "A" & "C" 14            H16330 PUMP SIDE                                                                                                                                          SYSTEM 15        1E11 H16330  10036003        8    SE DIAG            F006C      NONE          24.00  22.876          SOO034        107'       113'     NONE          Y                         UT             DRAIN                     TBD    BEHIND 1T41-B002A F034ATO 16        1E11 H16330  10036003        9    SE DIAG            D005A        TBD          20.00  19.000          SOO036        95'     104'-1"    SCAFF          Y                   FLUSH
                                                                                                                                                                                            ------- ---
QUARTER                        TBD     ABOVE MOTORS ON 95' CAP ON COND      Y - GOES                                                                                                                                                      ATTACH      ISO SHOWS VENT AT 193',
10037019        1  RX BLDG            MAKEUP    TOINSTR            4.500    4.026          SOO054        185'      193'      NONE           N                      VENT              MONTH                        6(3)   TOP 2" CAN'T BE VENTED 17        1E11 H16329                                                                                                                                                                                      ----    ------- ...:~-;;----
FPCHX                                                                                                                                                            SYSTEM                    ATTACH    BELOW SPECTACLE 1E11 H16329  10037019        2    ROOM              TO FPC          N          8.625    7.981          SOO054        185'       185'     NONE           N                          UT             DRAIN                       6(3)  FLANGE 18 F016B TO    Y-HARD                                                              146'-                                                            SYSTEM                    ATTACH 1E11          10037019        3  RX BLDG              F021B      PIPED          16.00   15.250          S01169        130'       8.5"     SCAFF         Y                           UT            DRAIN                      6(3) 19            H16329                                                              -------
OW            F015B TO                                                                                                                                        SYSTEM                    ATTACH 1E11 H16329  10037019        4   ACCESS              F0178      NONE          24.00  22.876          SOO039        130'     138'-9"    SCAFF          Y                      VENT               DRAIN                      6(3)  TOP DRYWELL ACCESS 20    -----                         ---                         -------
OW          F3031 COND                                                                                                                                          SYSTEM                   ATTACH 1E11          10037019            ACCESS            MAKEUP  1E11F3031          4.500    4.026                        130'      136      SCAFF        Y                          UT            DRAIN                      6(3)   VENT IN DRYWELL ACCESS 21            H16329                  5                                                                      -------    ------ --,--'-------------~-  ---
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6
                                                          -------------                                                                                                    -------------
Max Pipe                                                                                              Allowable Monitor                Westinghouse One Line                                          00    Pipe 10            Floor          Access            Monitoring       Monitoring          Void Size Point # System P&ID  One Line Dwg Location   Room         Description  Vent Valves  [in]    [in]  Isometric  EI  LineEI   Needs   Insulated   Method         Frequency             (Cu. Ft.)           Questions/Comments F007B TO                                                                                                                 ATTACH              MAY BE ABLE TO STAND 22  1E11  H16329  10037D19      6    NE DIAG              C002B      N     3.500   3.068     SOO049   87'     93   SCAFF       Y       FLUSH           QUARTER                 6(3)             ON PUMP DISCHARGE PIPE SYSTEM CAPONTOPB         N (R.V.                                                                   UTI               DRAIN/           ATTACH               CAP ON INSIDE TORUS 23  1E11  H16329  10037D19      7    NE DIAG                  HX  F055B)    14.00   13.250    SOO038   118'   122  NONE        Y     FLUSH(1)          QUARTER                 6(3)             ROOM WALL AT D005B                                                                                                                  ATTACH 24  1E11  H16329  10037D19      8    NE DIAG          ORIFICE    NONE      20.00   19.000   SOO038   96'     104  SCAFF       Y       FLUSH            QUARTER                6(3)           ABOVE PUMP MOTORS C002B/D                                                                                                SYSTEM            ATTACH              AT CONFLUENCE OF C002B 25  1E11  H16329  10037D19      9    NE DIAG      DISCHARGE    1E11 F3028  20.00   19.000    SOO038  107'     116  SCAFF       Y        UT               DRAIN               6(3)            ANDD
                                                                                                        ---------
CST SUCTION                                                   92'-7                                         SYSTEM                                 PIPE STUB CAPPED; OPEN 26  1E21  H16331  10036D97      1    SE DIAG              F002A    NONE     14.00   13.625   SOO073    87'     1/2" SCAFF       N         UT               DRAIN               0.13              F002TOVENT CST SUCTION                                                    92'-7                                        SYSTEM 27  1E21  H16331  10036D97      2     NE DIAG              F002B    NONE      14.00  13.625      TBD    87'     1/2" SCAFF      N         UT                DRAIN              0.18            1E21F002B MGSET        CST SUPPLY                                                                                                                    ATTACH 28  1E21  H16331  10036D98      1      RM1A                F030A      TBD     2.375   1.939   S01315    158' 173'-10" TBD       N       FLUSH               CYCLE               6(3)
                                                                                                                                                            ~~~~~~- ~~~~
CONDENSATE TRANSFER                                                                                                                    ATTACH 29  1E21  H16331  10036D98      2    RX BLDG    SUPPLY F030B        TBD     2.375    1.939    S01312    158' 174'-3" TBD       N       FLUSH              CYCLE                6(3)           BEHIND P005 PANEL CS A INJ LINE                                                                                                                ATTACH              OUTSIDE MG SET 30  1E21  H16331  10036D98      3    RX BLDG    D003A - F005A      TBD    10.75   10.020   SOO075    158' 172'-9" TBD       N       VENT             MONTH                 6(3)           PLATFORM CS B INJ LINE D003B TO                                                                                                                  ATTACH 31  1E21  H16331  10036D98      4    RX BLDG              F005B  1E21F013B  10.75  10.020      TBD    158'   172'-9" TBD        N       VENT              MONTH                6(3)            RWCU HX PLATFORM
                                                                                                                                                                                                  ~ ~~~~~~~~~-
SYSTEM UTI               DRAINI 32  1E41  H16332  10037DOO      1      HPCI      CST SUCTION       F3001    16.00   15.5"   H16868   119' 123'-0" NONE       N       FLUSH           QUARTER                 0.88 SYSTEM TORUS                                                                                UTI               DRAINI 33  1E41  H16332  10037DOO      2      HPCI          SUCTION      NONE      16.00     15"    H16868    87'   90'-1" NONE       N      FLUSH(1)        QUARTER                0.10 SYSTEM UTI              DRAINI 34  1E41  H16332  10037DOO    N/A    TORUS        DISCHARGE     1E41F3008  14.00  13.00    H16869  123'   123'-6" NONE        Y        VENT              MONTH              4.061 VENT\~}I            MONTHI            ATTACH 35  1E51  H16334  10037D01      1     TORUS        DISCHARGE      NONE        4"    3.624"    H16874  114'  123'-11" SCAFF      N      FLUSH(1)        QUARTER                  6(3)           INNER CATWALK BAY 1
~~~~~~~
SYSTEM CONDENSATE                                                     93'-6                       UTI               DRAINI 36  1E51  H16335  10037D01      2      RCIC    PUMP RETURN       NONE       2"   2.067"   S01466   87'   7/16" SCAFF       N     QUARTER               FLUSH               0.03 TORUS                                                 89'-8                                       SYSTEM 37  1E51  H16334  10037D01      3      RCIC          SUCTION      NONE        6"   6.065"   H16873   87'   7/8"   NONE       N         UT               DRAIN               0.02 SYSTEM UTI              DRAIN/            ATTACH 38  1E51  H16334  10037D01      4      RCIC        DISCHARGE       NONE       4"   3.826"   H16874   87' 104'-11" SCAFF       N       FLUSH           QUARTER                 6(3)
SYSTEM                                 INNER CATWALK @
39  1E21  H16331  10036D97    10(4)    CSA      CST SUCTION     1E21F127   14"   13.25"   H16121   117'   121'-2" TBD       N         UT               DRAIN               0.73             COLUMN LINES R6-RJ
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6
                -------                                       ----------                                                                                                               -------------- -----------
UTOR SYSTEM               IN TORUS SOUTHI 40         1E51       H16334             10037001     3i )
4 RCIC   CST SUCTION     NONE       6"       6.065"     H16108 87' 108' -7" SCAFF       Y   FLUSH DRAIN   0.29       SOUTHWEST SYSTEM ATTACH       MAY BE REACHED FROM 1E41        H16332            10037000    21(4)         HPCI    DISCHARGE   1E41F3004     14"       12.500"     H16869 87' 95'-10" SCAFF       N   FLUSH DRAIN   6(3)      NEARBY STAIRS 41 SYSTEM ATTACH 42        1E11B        H16329            10037019    43(4)         RHRB     DISCHARGE     NONE       16"       15.250"    H16837 117' 119'-6"  NONE        Y  FLUSH  DRAIN    6(3)      NORTHEAST DIAGONAL
                                      '-------------                                                          -------  --------------                                                                                i
                                ----
                                                      - -   --
piping IS pertormed dUring lUll pump (2)Une is partially vented during each monthly TS surveillance.
piping IS pertormed dUring lUll pump (2)Une is partially vented during each monthly TS surveillance.
(3)See maximum allowable void volume table in Attachment
(3)See maximum allowable void volume table in Attachment 6.
: 6. (4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-140, rev. 1
(4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-140, rev. 1
-----------------Enclosure 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and 6 -----------------------,--------,---------Max Pipe Allowable Monitor Westinghouse One Line OD Pipe ID Floor Line Access Monitoring Void Size Point # System P&ID One Line Dwg Location Room Description Vent Valves [il1] [In] Isometric EI EI Needs Insulated Method Frequency (Cu. Ft.) Questions/Comments DISCHARGE SYSTEM ATTACH 6(3)1 2E11A H26015 10037D04 1 NE DIAG C002A FV022 20.00 19.000 S31755 107' 114'-8" SCAFF. Y UT DRAIN CONFLUENCE OF C002NC -------'----------RHR A STEAM COND LINE SYSTEM (CAPPED) AT UTI DRAINI ATTACH CAP ON TORUS ROOM 2 2E11A H26015 10037D04 2 NE DIAG B001A HX NONE 16.00 15.250 S28396 118' 123'-8" NONE Y FLUSH(1) QUARTER 6(3) WALL NORTH END DW ACCESS, DW SYSTEM ATTACH LLRT CONNECTION BELOW 6(3)2E11A H26015 10037D04 3 ACCESS F017A TBD 24.00 22.876 S31899 130' 134'-6" NONE Y UT DRAIN F017 3 SOUTH END DW ACCESS, DW SYSTEM ATTACH LLRT CONNECTION BELOW 6(3)4 2E11B H26014 10037D04 4 ACCESS F017B 2E11F058B 24.00 22.876 S28472 130' 134'-6" NONE Y UT ----DRAIN RHR B COND LINE (CAPPED) AT UTI DRAINI 6(3)2E11B H26014 10037D04 5 SE DIAG B001B HX NONE 16.00 15.250 TBD 118' 123' NONE Y FLUSH(1) QUARTER CAPPED IN DIAGONAL 5 1------C002B/D ATTACH UPSIDE DOWN U 6(3)6 2E11B H26014 10037D04 6 SE DIAG CONFLUENCE FV021 20.00 19.000 S31754 107' 114' SCAFF. Y FLUSH QUARTER NOT PIPING UNDER SYSTEM 6(3)7A 2E11A H26014 10037D04 SHOWN TBD F016A TBD 16.00 15.250 TBD 130' TBD TBD _IB[)_ UT DRAIN -------------VERTICAL PIPING UNDER SYSTEM ATTACH RWCU HX ROOM INSIDE 6(3)7B 2E11B H26014 10037D04 7 RWCU HX F016B F036B 16.00 15.250 S31425 158' 169' SCAFF. N UT DRAIN F023 HEAD ATTACH EAST SIDE BY HI 6(3)8 2E11B H26014 10037D04 8 RX BLDG SPRAY HARD PIPE 4.500 4.026 S31419 185' 193' SCAFF. Y VENT MONTH VENTS F067 RECIRC SYSTEM JUST OFF 147' GRATING IN 9 2E11 H26015 10037D04 1 DW SUCTION SDC TBD 20.00 19.000 S28478 147' 154'-6" SCAFF. Y UT DRAIN TBD DW SYSTEM --EVEN WITH GRATING ON 10 2E11B H26014 10037D04 2 SE DIAG BELOW F006D NONE 20.00 19.000 S28406 107' 107' SCAFF. Y UT DRAIN TBD 107' SYSTEM ON 97' GRATING (MAY NEED 11 2E11B H26014 10037D04 3 SE DIAG
 
_____ -NONE 20.00 19.000 S28412 107' 110' NONE ---Y UT DRAIN TBD TQ COME FROM BELOW) SYSTEM 12 2E11A H26015 10037D04 4 NE DIAG BELOW F006A NONE 20.00 19.000 S28398 107' 112' NONE Y UT DRAIN TBD SYSTEM BACK CORNER NEED 13 2E11A H26015 10037D04 5 NE DIAG BELOW F006C NONE 20.00 19.000 $£839L 107' 107' SCAFF. Y UT DRAIN TBD SCAFF FROM 97' SYSTEM 2E11 H26015 10037D04 6 DW F008 TO F009 NONE 20.00 19.000 S28478 127' 135' SCAFF. Y UT DRAIN TBD 14 -----------------15 2E21A H26018 10037D07 1 NE DIAG E21F002A NONE 14.00 13.250 S27015 97' 100' NONE N UT DRAIN 16 2E21B H26018 10037D07 2 SE DIAG F002B NONE 14.00 13.250 S26991 97' 100 NONE N UT DRAIN CS2A INJECTION UTI DRAINI VENT(2) 17 2E21A H26018 10037D07 3 RX BLDG LINE NONE 10.7 10.020 TBD 158' 171 '-3" NONE N MONTH D003A I 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
-----Enclosure 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and 6 Max Pipe Monitor Westinghouse One Line OD PlpelD Floor Line Access Monitoring Void Point # System P&ID One Line Location Room Description Vent Valves [in] [in] Isometric EI EI Needs Insulated Method (Cu. Ft.)
Attachments 1, 2 and 6
CS2B INJECTION UTI DRAINI 18 2E21B H26018 10037D07 4 RWCU HX LINE NONE 10.75 10.020 TBD 158' 171'-3" SCAFF. N VENT(2) MONTH 6(3) DISCHARGE SYSTEM 6(3)19 2E21A H26018 10037D07 5 NE DIAG LINE NONE 12.75 12.090 TBD 118' 123'-2" NONE N UT DRAIN DISCHARGE SYSTEM 20 2E21B H26018 10037D07 6 SE DIAG LINE NONE 12.75 12.090 TBD 118' 123'-2" NONE N UT F015B COMMON I 21 2E41 H26020 10037D05 1 HPCI SUCTION NONE 14 13.25 H26839 87' 92'-6" NONE N FLUSH(1) QUARTER VENTI MONTHI 6(3)22 2E41 H26020 10037D05 2 TORUS DISCHARGE NONE 14 12.5 H26840 114' 109'-6" NONE Y FLUSH QUARTER OUTER CATWALK BAY 2 SYSTEM S.E.DIAGONAL AGAINST 23 2E51 H26023 10037D06 1 TORUS RHR SUCTION FV101 4 4.026 H26844 87' 107'-9" YES Y UT DRAIN TBD TORUS WALL DISCHARGE I ATTACH 6(3)24 2E51 H26023 10037D06 2 TORUS FEED NONE 4 3.826 H26845 114' 123'-0" YES Y FLUSH(1) QUARTER INNER TORUS BAY 25 2E51 H26024 10037D06 3 RCIC DIAG PUMP RETURN NONE 2 1.939 S31014 87' 90'-4" NONE Y FLUSH QUARTER TORUS 26 2E51 H26023 10037D06 4 RCICDIAG SUCTION NONE 6 6.065 H26844 87' 89'-5" NONE Y UT DRAIN SYSTEM ATTACH UPSTREAM OF 6(3)27 2E11A H26015 10037D04 NE DIAG DISCHARGE NONE 24 22.876" H26820 117' 121'-5" NONE FLUSH DRAIN ORIFICE 2E11 N014A SDC SUCTION UTOR SYSTEM 50(4)28 2E11A H26015 10037D04 NE DIAG TO C002C NONE 20 19.000" H26819 115' 115'-1" LADDER FLUSH DRAIN 0.58 UTOR SYSTEM 24A1B(4)29 2E51 H26023 10037D06 TORUS CST SUCTION NONE 6 6.065" H26844 87' 108'-7" SCAFF FLUSH DRAIN UTOR SYSTEM 6(3)30 2E51 H26023 10037D06 RCIC DIAG DISCHARGE NONE 4 5.761" H26845 87' 104'-1" SCAFF FLUSH DRAIN piping IS pertormed dunng tUIl pump (2)Une is partially vented during each monthly TS surveillance.
        -----         ------                   ----                                   -------                       ----                   --,---                                                         -----                        ,---------   ---
(3)See maximum allowable void volume table in Attachment
Max Pipe                                                                                                                   Allowable Monitor                 Westinghouse One Line                                                 OD     Pipe ID             Floor     Line           Access                             Monitoring                     Void Size Point # System   P&ID   One Line Dwg Location   Room         Description Vent Valves         [il1]   [In] Isometric     EI       EI           Needs           Insulated           Method             Frequency (Cu. Ft.)                     Questions/Comments DISCHARGE                                                                                                                                       SYSTEM   ATTACH FV022                 19.000   S31755   107'     114'-8"         SCAFF.                 Y               UT                 DRAIN     6(3)              CONFLUENCE OF C002NC 1      2E11A  H26015        10037D04    1      NE DIAG          C002A                      20.00                                                                                                                          -------   '---------- -------
: 6. (4)This location is detailed in Attachment 4 of Westinghouse Report L TR-SEE-III-08-141, rev. 1   2EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and TOTAL ALLOWABLE VOLUME(2)
RHR A STEAM COND LINE                                                                                                                                     SYSTEM (CAPPED) AT                                                                                                                   UTI               DRAINI ATTACH               CAP ON TORUS ROOM 118'   123'-8"         NONE                   Y           FLUSH(1)           QUARTER       6(3)               WALL 2      2E11A H26015        10037D04    2      NE DIAG        B001A HX      NONE          16.00  15.250    S28396 NORTH END DW ACCESS, DW                                                                                                                                                      SYSTEM   ATTACH               LLRT CONNECTION BELOW F017A           TBD         24.00   22.876   S31899     130'   134'-6"         NONE                   Y               UT                 DRAIN     6(3)              F017 3     2E11A H26015        10037D04    3      ACCESS                                                                      -----
SYSTEM INCLUDED MONITORING LOCATIONS(1)
SOUTH END DW ACCESS, DW                                                                                                                                                       SYSTEM   ATTACH               LLRT CONNECTION BELOW 2E11F058B           24.00   22.876   S28472     130'   134'-6"         NONE                   Y               UT                 DRAIN      6(3)              F017 4      2E11B H26014        10037D04    4      ACCESS            F017B                                                                                                                      ----
RELIEF VALVE LIFTING [in 3] RELIEF VALVE LIFTING [tel SUPPORT DAMAGE [in 3] SUPPORT DAMAGE [tt 3 ] lEllA 8,9,10,11,13,14 10746.3 6.219 7403.3 4.284 lEl1B 17,18,19,20,21,22,23,24,25 9976.8 5.774 9976.8 5.774 lE11B @ FPC 17,18,19,21,22,23,24,25 3276.8 1.896 5876.8 3.401 1E21A 28,30 934.2 0.541 994.2 0.575 lE21B 29,31 1014.2 0.587 1034.2 0.598 1E41 N/A N/A 2218.7 1.284 lE51 34,37 N/A N/A 2342.6 1.356 2El1A 1,2,3,7A 14062.8 8.138 15462.8 8.948 2E11B 4,5,6,7B 9362.8 5.418 9262.8 5.360 2E11B @ F023 4,5,6,7B,8 5576.8 3.227 6093.8 3.527 2E21A 17,19 270.0 0.156 910.0 0.527 2E21B 18,20 300.0 0.174 1000.0 0.579 2E41 22 N/A N/A 3518.7 2.036 2E51 24 N/A N/A 4895.6 2.833 Due to the nature of pump start (pressure wave) and void collapse water hammer phenomena, the sum of all the voids the discharge piping must be used. (2)The left hand columns provide the void size required to potentially lift the system discharge relief valve due to water hammer related pressure spikes. The right hand columns provide the void size required to potentially damage piping supports due to excessive water hammer related loading. The lower of the given values should be used as the system maximum total allowable void volume. In general, this is the volume associated with relief valve lifting.}}
RHR B STEAM COND LINE                                                                                                                                     SYSTEM (CAPPED) AT                                                                                                                   UTI               DRAINI ATTACH NONE          16.00    15.250   TBD       118'     123'           NONE                   Y           FLUSH(1)           QUARTER       6(3)              CAPPED IN DIAGONAL 5     2E11B H26014        10037D04    5      SE DIAG        B001B HX                                                                                          1------ -------
C002B/D                                                                                                                                              ATTACH               UPSIDE DOWN U AT FV021         20.00   19.000   S31754     107'     114'           SCAFF.                 Y             FLUSH             QUARTER       6(3)               CONFLUENCE 6      2E11B H26014       10037D04   6      SE DIAG    CONFLUENCE VERTICAL NOT                PIPING UNDER                                                                                                                                      SYSTEM  ATTACH 16.00   15.250   TBD       130'     TBD             TBD                                   UT                 DRAIN     6(3) 7A      2E11A H26014        10037D04 SHOWN        TBD            F016A          TBD -----
_IB[)_                                                      -------- 1-----
VERTICAL PIPING UNDER                                                                                                                                     SYSTEM   ATTACH               RWCU HX ROOM INSIDE 16.00    15.250   S31425     158'     169'           SCAFF.                 N               UT                 DRAIN     6(3)               DOOR 7B      2E11B H26014       10037D04   7    RWCU HX            F016B        F036B F023 HEAD                                                                                                                                              ATTACH                EAST SIDE BY HI POINT HARD PIPE           4.500   4.026   S31419     185'     193'           SCAFF.                 Y             VENT               MONTH     6(3)              VENTS 8      2E11B H26014        10037D04    8    RX BLDG            SPRAY F067 RECIRC                                                                                                                                     SYSTEM                         JUST OFF 147' GRATING IN 9       2E11 H26015       10037D04   1         DW     SUCTION SDC           TBD         20.00   19.000   S28478     147'   154'-6"         SCAFF.                 Y               UT                 DRAIN --
TBD                 DW SYSTEM                         EVEN WITH GRATING ON 10     2E11B H26014       10037D04   2     SE DIAG   BELOW F006D         NONE         20.00   19.000   S28406     107'     107'           SCAFF.                 Y               UT                 DRAIN     TBD                 107' SYSTEM                         ON 97' GRATING (MAY NEED 11     2E11B H26014       10037D04   3     SE DIAG   BELOWEQ()6~          NONE
                                                                          -------
20.00   19.000   S28412     107'     110'           NONE
_____ - _c_:-=--  ---
Y               UT                 DRAIN     TBD                 TQ COME FROM BELOW)
SYSTEM 12     2E11A H26015       10037D04   4     NE DIAG   BELOW F006A         NONE         20.00   19.000   S28398     107'     112'           NONE                   Y               UT                 DRAIN     TBD SYSTEM                         BACK CORNER NEED 13     2E11A H26015       10037D04   5     NE DIAG   BELOW F006C         NONE         20.00   19.000   $£839L     107'     107'           SCAFF.                 Y               UT                 DRAIN     TBD                 SCAFF FROM 97' SYSTEM 14      2E11 H26015       10037D04   6         DW     F008 TO F009
                                                          -----
NONE         20.00   19.000   S28478     127'     135'           SCAFF.                 Y               UT
                                                                                                                                                                                            ------------ 1---
DRAIN    TBD SYSTEM 15     2E21A H26018       10037D07   1     NE DIAG         E21F002A       NONE         14.00   13.250   S27015     97'     100'           NONE                   N               UT                 DRAIN     TBD SYSTEM 16     2E21B H26018       10037D07   2     SE DIAG           F002B         NONE         14.00   13.250   S26991     97'     100             NONE                   N               UT                 DRAIN     TBD CS2A                                                                                                                                     SYSTEM INJECTION                                                                                                                   UTI               DRAINI ATTACH VENT(2)                        6(3) 17     2E21A H26018       10037D07   3     RX BLDG           LINE         NONE         10.7     10.020     TBD     158'   171 '-3"         NONE                   N
                                                                                                                                                                                    -----~-=
MONTH                        D003A                      I
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6
                                                                                  ~~~~~~~-
c-~~~~~                                                                                                                                                                                                          ~~~~- ~~~
Max Pipe                                                                                           Allowable Monitor                           Westinghouse   One Line                                           OD     PlpelD                 Floor   Line       Access               Monitoring           Void Size Point #   System       P&ID     One Line Dw~    Location   Room       Description     Vent Valves [in]     [in] Isometric         EI     EI         Needs     Insulated Method   Frequency~  (Cu. Ft.)       Questions/Comments CS2B                                                                                                           SYSTEM INJECTION                                                                                                 UTI     DRAINI   ATTACH 18     2E21B     H26018       10037D07         4     RWCU HX         LINE           NONE     10.75   10.020       TBD         158' 171'-3"     SCAFF.         N       VENT(2)   MONTH         6(3)         D003B CS2A DISCHARGE                                                                                                         SYSTEM   ATTACH 19     2E21A     H26018       10037D07         5     NE DIAG       LINE           NONE     12.75   12.090       TBD       118'   123'-2"       NONE           N         UT       DRAIN       6(3)          F015A CS2B DISCHARGE                                                                                                         SYSTEM   ATTACH 20     2E21B     H26018       10037D07           6     SE DIAG       LINE           NONE     12.75   12.090       TBD       118' 123'-2"       NONE           N         UT       DRAIN        6(3)          F015B
                                                                                                                                                    ~- I-----~~~~~ ~ ~
COMMON 21     2E41     H26020       10037D05           1     HPCI       SUCTION         NONE       14     13.25   H26839         87'   92'-6"       NONE           N     FLUSH(1) QUARTER       TBD                                I VENTI     MONTHI   ATTACH 22     2E41     H26020       10037D05         2     TORUS       DISCHARGE         NONE       14     12.5   H26840       114'   109'-6"       NONE           Y       FLUSH   QUARTER       6(3)        OUTER CATWALK BAY 2 SYSTEM                     S.E.DIAGONAL AGAINST 23     2E51     H26023       10037D06           1     TORUS     RHR SUCTION       FV101       4     4.026   H26844         87'   107'-9"         YES         Y         UT       DRAIN       TBD           TORUS WALL DISCHARGE I                                                                                                                 ATTACH 24     2E51     H26023       10037D06           2     TORUS         FEED           NONE         4     3.826   H26845         114' 123'-0"         YES         Y     FLUSH(1) QUARTER       6(3)          INNER TORUS BAY 9 CONDENSATE 25     2E51     H26024       10037D06           3   RCIC DIAG PUMP RETURN         NONE         2     1.939   S31014         87'   90'-4"       NONE           Y       FLUSH   QUARTER       0.02 TORUS                                                                                                           SYSTEM 26     2E51     H26023       10037D06           4   RCICDIAG     SUCTION         NONE         6     6.065   H26844         87'   89'-5"       NONE           Y         UT       DRAIN       0.03 SYSTEM   ATTACH           UPSTREAM OF FLOW 27     2E11A     H26015       10037D04         42(4)  NE DIAG     DISCHARGE         NONE       24   22.876"   H26820       117'   121'-5"       NONE           Y      FLUSH     DRAIN       6(3)        ORIFICE 2E11 N014A SDC SUCTION                                                                                             UTOR     SYSTEM 28    2E11A      H26015      10037D04        50(4)   NE DIAG     TO C002C         NONE       20   19.000"   H26819       115'   115'-1"     LADDER           Y      FLUSH     DRAIN       0.58 UTOR     SYSTEM 29      2E51      H26023      10037D06      24A1B(4) TORUS     CST SUCTION       NONE         6   6.065"   H26844         87'   108'-7"     SCAFF           Y      FLUSH     DRAIN       0.09 UTOR     SYSTEM   ATTACH 30     2E51     H26023       10037D06         34(4)  RCIC DIAG   DISCHARGE         NONE         4   5.761"   H26845         87'   104'-1"     SCAFF           Y      FLUSH     DRAIN       6(3)
          ~~      ~              ~
                                                - --
piping IS pertormed dunng tUIl pump
                                                            --                                                  ~~~~-  ~~~~~~~-~~~~ ~~~~~~~~
(2)Une is partially vented during each monthly TS surveillance.
(3)See maximum allowable void volume table in Attachment 6.
(4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-141, rev. 1
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6 TOTAL ALLOWABLE VOLUME(2)
LOAD              LOAD INCLUDED MONITORING         RELIEF VALVE            RELIEF VALVE SYSTEM                                                                                  SUPPORT            SUPPORT LOCATIONS(1)           LIFTING [in 3]           LIFTING [tel DAMAGE [in 3]     DAMAGE [tt 3 ]
lEllA               8,9,10,11,13,14           10746.3                 6.219             7403.3             4.284 lEl1B         17,18,19,20,21,22,23,24,25       9976.8                   5.774             9976.8             5.774 lE11B @ FPC         17,18,19,21,22,23,24,25       3276.8                   1.896           5876.8             3.401 1E21A                   28,30                 934.2                   0.541             994.2             0.575 lE21B                   29,31                 1014.2                 0.587             1034.2             0.598 1E41                                           N/A                     N/A             2218.7             1.284 lE51                   34,37                   N/A                     N/A             2342.6             1.356 2El1A                   1,2,3,7A               14062.8                   8.138           15462.8             8.948 2E11B                   4,5,6,7B               9362.8                   5.418           9262.8             5.360 2E11B @ F023               4,5,6,7B,8             5576.8                   3.227           6093.8             3.527 2E21A                   17,19                 270.0                   0.156             910.0             0.527 2E21B                     18,20                 300.0                   0.174             1000.0             0.579 2E41                     22                   N/A                     N/A             3518.7             2.036 2E51                     24                   N/A                     N/A             4895.6             2.833 Due to the nature of pump start (pressure wave) and void collapse water hammer phenomena, the sum of all the voids the discharge piping must be used.
(2)The left hand columns provide the void size required to potentially lift the system discharge relief valve due to water hammer related pressure spikes. The right hand columns provide the void size required to potentially damage piping supports due to excessive water hammer related loading. The lower of the given values should be used as the system maximum total allowable void volume. In general, this is the volume associated with relief valve lifting.}}


=Text=
=Text=
{{#Wiki_filter:Southern Nucieat Operating Company, Inc SOUTHERN A COMPANY December 14, 2009 Docket 50-321 U. S. Nuclear Regulatory ATTN: Document Control Washington, D. C.
{{#Wiki_filter:Southern Nucieat Operating Company, Inc SOUTHERN COMPANY A
Edwin I. Hatch Nuclear Response to NRC Generic Letter Response to Requests for Additional Ladies and Gentlemen:
December 14, 2009 Docket Nos.:      50-321                                             NL-09-1B03 50-366 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Response to NRC Generic Letter 200B-01 Response to Requests for Additional Information Ladies and Gentlemen:
On October 10, 200B (NL-OB-1340)
On October 10, 200B (NL-OB-1340) SNC submitted the nine-month response to Generic Letter 2008-01 and on August 24, 2009 (NL-09-1 067) SNC submitted for the Edwin I Hatch Nuclear Plant(HNP) Unit 2 post-outage response to Nuclear Regulatory Commission (NRC) Generic Letter 2008-01. In a letter dated November 5, 2009 the NRC submitted a request for additional information concerning the latter response referenced above. The requested response date was 45 days from the calendar date of the letter.
SNC submitted the nine-month response Generic Letter 2008-01 and on August 24, 2009 (NL-09-1 067) SNC submitted for Edwin I Hatch Nuclear Plant(HNP)
The enclosure to this letter contains the SNC response to the referenced NRC request for additional information.
Unit 2 post-outage response to Regulatory Commission (NRC) Generic Letter 2008-01. In a letter dated 5, 2009 the NRC submitted a request for additional information concerning the response referenced above. The requested response date was 45 days from calendar date of the The enclosure to this letter contains the SNC response to the referenced request for additional This letter contains an NRC commitment.
This letter contains an NRC commitment.
u.s Nuclear Regulat01Y Page Mr. M. J. Ajluni states he is Nuclear Licensing Manager of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and to the best of his knowledge and belief, the facts set forth in this letter are true. If you have any questions, please advise. Sincerely, M. J. Manager, Nuclear Sworn to and subscribed before me this -LL day of  
 
,2009.
u.s Nuclear Regulat01Y Commission NL-09-J803 Page 2 Mr. M. J. Ajluni states he is Nuclear Licensing Manager of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and to the best of his knowledge and belief, the facts set forth in this letter are true.
Notary Public My commission expires: ///0 t.//J.o13 MJA/PAHliac  
If you have any questions, please advise.
Sincerely,
  ~~~
M. J. Ajluni Manager, Nuclear Licensing Sworn to and subscribed before me this   -LL day of f1u,~              ,2009.
~oJf~~ Notary Public My commission expires:     ///0 t.//J.o13 MJA/PAHliac


==Enclosures:==
==Enclosures:==
: 1. RAI Responses to NRC. 2. Regulatory Commitment for Submitting TS Change after TSTF Approval by NRC. 3. Attachments 1,2, and 6 of 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems."
: 1. RAI Responses to NRC.
U.S Nuclear Regulatory Commission NL-09-1803 Page 3 Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. D. R. Madison, Vice President Hatch Ms. P. M. Marino, Vice President Engineering RTYPE: CHA02.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Ms. D. N. Wright, NRR Project Manager Hatch Mr. E. D. Morris, Senior Resident Inspector  
: 2. Regulatory Commitment for Submitting TS Change after TSTF Approval by NRC.
-Hatch Edwin I Hatch Nuclear Response to NRC Generic letter Response to Requests for Additional Enclosure RAI Responses to Enclosure RAJ Responses to REQUEST FOR ADDITIONAL Guidance on Nuclear Regulatory Commission (NRC) staff expectations is provided by Reference 1 which is generally consistent with Nuclear Energy Institute (NEI) guidance provided to industry in Reference 2 as clarified in later NEI communications.
: 3. Attachments 1,2, and 6 of 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems."
The NRC staff recommends that the licensee consult Reference 1 when responding to the following RAls: 1. Provide a regulatory commitment and a schedule for applying the Technical Specification Task Force (TSTF) process to any Technical Specification (TS) changes resulting from GL 2008-01. Response:
 
SNC has provided a regulatory commitment in Enclosure 2 to review any TSTF issued by the NRC concerning gas intrusion.
U.S Nuclear Regulatory Commission NL-09-1803 Page 3 cc:  Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. D. R. Madison, Vice President Hatch Ms. P. M. Marino, Vice President Engineering RTYPE: CHA02.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Ms. D. N. Wright, NRR Project Manager Hatch Mr. E. D. Morris, Senior Resident Inspector - Hatch
SNC will either submit a technical specification change based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.
 
Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to Requests for Additional Information Enclosure 1 RAI Responses to NRC
 
Enclosure I RAJ Responses to NRC REQUEST FOR ADDITIONAL INFORMATION Guidance on Nuclear Regulatory Commission (NRC) staff expectations is provided by Reference 1 which is generally consistent with Nuclear Energy Institute (NEI) guidance provided to industry in Reference 2 as clarified in later NEI communications. The NRC staff recommends that the licensee consult Reference 1 when responding to the following RAls:
: 1. Provide a regulatory commitment and a schedule for applying the Technical Specification Task Force (TSTF) process to any Technical Specification (TS) changes resulting from GL 2008-01.
Response: SNC has provided a regulatory commitment in Enclosure 2 to review any TSTF issued by the NRC concerning gas intrusion. SNC will either submit a technical specification change based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.
: 2. SNC letter dated August 24, 2009 states that the procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" was implemented on November 19, 2008. The NRC staff requests the following additional information relative to this procedure:
: 2. SNC letter dated August 24, 2009 states that the procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" was implemented on November 19, 2008. The NRC staff requests the following additional information relative to this procedure:
a) Summarize the monitored locations along with the associated surveillance methods: Response:
a) Summarize the monitored locations along with the associated surveillance methods:
Details for monitoring method and frequency along with point details for each monitoring location are provided in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure
Response: Details for monitoring method and frequency along with point details for each monitoring location are provided in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure 3.
: 3. b) Discuss the surveillance intervals for the monitored locations, including justifications for surveillance intervals greater than a month; Response:
b) Discuss the surveillance intervals for the monitored locations, including justifications for surveillance intervals greater than a month; Response: The applicable system piping was reviewed as per Generic Letter 2008-01 and critical locations were identified where voids could accumulate and the venting process could be challenged. The review concluded that none of the critical locations have active gas accumulation mechanisms.
The applicable system piping was reviewed as per Generic Letter 2008-01 and critical locations were identified where voids could accumulate and the venting process could be challenged.
The Hatch Monitoring Program is focused around these critical locations. The monitoring takes credit for the monthly activity that is performed by Operations as per the Technical Specification surveillance for venting of ECCS systems. The program also takes credit for dynamic flushing that occurs as a result of the quarterly ECCS flow surveillances. All of the monitored locations are vented or dynamically flushed anytime that the section of piping is drained such as for maintenance activities. Confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.
The review concluded that none of the critical locations have active gas accumulation mechanisms.
The surveillance intervals for the monitored locations are contained in Attachments 1 and 2 of Enclosure 3. Justification for frequencies longer than monthly are based on the lack of an active gas accumUlation mechanism, dynamic flushing as a result of quarterly flow surveillances, and confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.
The Hatch Monitoring Program is focused around these critical locations.
E1-1
The monitoring takes credit for the monthly activity that is performed by Operations as per the Technical Specification surveillance for venting of ECCS systems. The program also takes credit for dynamic flushing that occurs as a result of the quarterly ECCS flow surveillances.
 
All of the monitored locations are vented or dynamically flushed anytime that the section of piping is drained such as for maintenance activities.
Enclosure 1 RAI Responses to NRC Procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" provides an allowance to modify this frequency based on the results of previous gas monitoring results. If a void is identified during the routine monitoring, the frequency is evaluated to determine if an increase (or shorter monitoring period) is warranted.
Confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.
The surveillance intervals for the monitored locations are contained in Attachments 1 and 2 of Enclosure
: 3. Justification for frequencies longer than monthly are based on the lack of an active gas accumUlation mechanism, dynamic flushing as a result of quarterly flow surveillances, and confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.
E1-1 Enclosure RAI Responses to Procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" provides an allowance to modify this frequency based on the results of previous gas monitoring results. If a void is identified during the routine monitoring, the frequency is evaluated to determine if an increase (or shorter monitoring period) is warranted.
c) Provide the surveillance criteria.
c) Provide the surveillance criteria.
The surveillance acceptance criteria are specified in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure
The surveillance acceptance criteria are specified in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure 3.
: 3. d) Discuss actions to be taken if surveillance criteria are not met. Response:
d) Discuss actions to be taken if surveillance criteria are not met.
Plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," requires that for any identified voids that exceed the allowable size, a condition report is initiated and the Operations Shift Manager and/or the Shift Supervisor is immediately notified.
Response: Plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," requires that for any identified voids that exceed the allowable size, a condition report is initiated and the Operations Shift Manager and/or the Shift Supervisor is immediately notified. If any voids are identified at any monitoring point that does not have an approved maximum allowable limit, either a formal evaluation will be performed or the void will be removed by venting or flushing. The impact on system operability will be addressed as a result of normal processing of the condition report by the on-shift operations personnel. In addition, Engineering personnel are immediately notified to perform an evaluation.
If any voids are identified at any monitoring point that does not have an approved maximum allowable limit, either a formal evaluation will be performed or the void will be removed by venting or flushing.
e) State whether all voids identified will be quantified, recorded, and entered into the Corrective Action Program (CAP).
The impact on system operability will be addressed as a result of normal processing of the condition report by the on-shift operations personnel.
Response: Per plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," all identified voids, including the measured size, are recorded in a data package and a condition report generated to enter the information into the Corrective Action Program.
In addition, Engineering personnel are immediately notified to perform an evaluation.
: 3. Describe any process improvements made to guard against gas intrusion due to inadvertent draining, system realignments, incorrect maintenance procedures, or other evolutions.
e) State whether all voids identified will be quantified, recorded, and entered into the Corrective Action Program (CAP). Response:
Per plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," all identified voids, including the measured size, are recorded in a data package and a condition report generated to enter the information into the Corrective Action Program. 3. Describe any process improvements made to guard against gas intrusion due to inadvertent draining, system realignments, incorrect maintenance procedures, or other evolutions.
Plant evolutions involving system re-alignment or specific component manipulation that could result in inadvertent draining or inadvertent gas intrusion are controlled by plant procedures and performed only by trained plant staff. This includes system draining, tagouts, and system restoration fill and vent activities.
Plant evolutions involving system re-alignment or specific component manipulation that could result in inadvertent draining or inadvertent gas intrusion are controlled by plant procedures and performed only by trained plant staff. This includes system draining, tagouts, and system restoration fill and vent activities.
The HNP plant procedures applicable to these evolutions (Operations, Maintenance, and Instrument and Controls) were independently reviewed for improvements that could be made to address issues related to Generic Letter 2008-01. The review included such areas as vent scope, proper system vent sequence, precautions and limitations, potential gas accumulation mechanisms, documentations of voids identified, etc. From this review, resulting recommendations were evaluated by the plant staff and incorporated into the procedures as deemed appropriate.
The HNP plant procedures applicable to these evolutions (Operations, Maintenance, and Instrument and Controls) were independently reviewed for improvements that could be made to address issues related to Generic Letter 2008-01. The review included such areas as vent scope, proper system vent sequence, precautions and limitations, potential gas accumulation mechanisms, documentations of voids identified, etc. From this review, resulting recommendations were evaluated by the plant staff and incorporated into the procedures as deemed appropriate.
Simplified piping elevation drawings were created as aids to be used by Operations and Engineering personnel to develop vent and/or ultrasonic testing (UT) plans. E1-2 Enclosure RAI Responses to Additional vents have been added in Hatch Unit 2 piping locations that were determined not to have adequate venting capability.
Simplified piping elevation drawings were created as aids to be used by Operations and Engineering personnel to develop vent and/or ultrasonic testing (UT) plans.
Vents will be added to Hatch Unit 1 in similar locations during the Spring 2010 refueling outage. Operations, maintenance, and engineering personnel have been trained on the issues related to gas accumulation, including the potential causes and impact. This training also included the procedural changes described above. 4. Training was not identified in the GL but is considered to be a necessary part of applying procedures and other activities when addressing the issues identified in the GL Briefly discuss training.
E1-2
Response:
 
Training on Gas Accumulation and Management has been provided into the HNP continuing training process and provided to Operations and Maintenance personnel as part of the response to INPO SER 02-05, "Gas Intrusion in Safety Systems." This training focused on the potential for gas accumulation mechanisms and negative impact of voiding on system performance and reliability.
Enclosure 1 RAI Responses to NRC Additional vents have been added in Hatch Unit 2 piping locations that were determined not to have adequate venting capability. Vents will be added to Hatch Unit 1 in similar locations during the Spring 2010 refueling outage.
Several Operations and Engineering procedures have been developed or revised as a result of the response activities to Generic Letter 2008-01. When any station procedure is modified, an assessment for training needs and change management is required in accordance with HNP procedure DI-TRN-61-1006, "Training Request Worksheet." In addition, selected site personnel have been trained and qualified on the use of UT equipment to perform void detection.
Operations, maintenance, and engineering personnel have been trained on the issues related to gas accumulation, including the potential causes and impact. This training also included the procedural changes described above.
SNC is an active participant in the NEI Gas Accumulation Team, which is currently coordinating with the Institute of Nuclear Power Operations in the development of generic training modules for gas accumulation and management.
: 4. Training was not identified in the GL but is considered to be a necessary part of applying procedures and other activities when addressing the issues identified in the GL Briefly discuss training.
These training modules target the Engineering, Operations, and Maintenance disciplines.
Response: Training on Gas Accumulation and Management has been provided into the HNP continuing training process and provided to Operations and Maintenance personnel as part of the response to INPO SER 02-05, "Gas Intrusion in Safety Systems." This training focused on the potential for gas accumulation mechanisms and negative impact of voiding on system performance and reliability.
The first module has been received by HNP and will be evaluated in the first quarter of 2010 for incorporation into the site personnel training processes in a version tailored to meet the station needs as per 61-1006, "Training RequestWorksheef." As the remainder of the training modules are completed and become available to the industry, SNC will evaluate them for applicability to HNP. Pending release of remaining products.
Several Operations and Engineering procedures have been developed or revised as a result of the response activities to Generic Letter 2008-01. When any station procedure is modified, an assessment for training needs and change management is required in accordance with HNP procedure DI-TRN-61-1006, "Training Request Worksheet."
the schedule for such planned training has not yet been determined.
In addition, selected site personnel have been trained and qualified on the use of UT equipment to perform void detection.
REFERENCES Ruland, William H., "Preliminary Assessment of Responses to Generic Letter 2008-01, Managing Gas Accumulation in emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, i and Future NRC Staff Review Plans," NRC letter to James H. Riley, Nuclear Energy Institute, ML091390637, May 28,2009. Riley, James H., "Generic Letter (GL) 2008-01 , "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Contain Spray Systems Evaluation and 3 Month Response Template," Letter to Administrative Points of Contact from Director, Engineering Nuclear Generation Division, Nuclear Energy Institute, Enclosure 2, "Generic Letter 2008-01 Response Guidance," March 20, 2008. E1-3 Edwin I Hatch Nuclear Response to NRC Generic letter Response to requests for Additional Enclosure Regulatory Enclosure RAJ Responses to NRC Commitment Type Scheduled One-Time Action Completion Date SNC will either submit X Within one year after a technical NRC Issuance specification based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.
SNC is an active participant in the NEI Gas Accumulation Team, which is currently coordinating with the Institute of Nuclear Power Operations in the development of generic training modules for gas accumulation and management. These training modules target the Engineering, Operations, and Maintenance disciplines. The first module has been received by HNP and will be evaluated in the first quarter of 2010 for incorporation into the site personnel training processes in a version tailored to meet the station needs as per DI-TRN 61-1006, "Training RequestWorksheef." As the remainder of the training modules are completed and become available to the industry, SNC will evaluate them for applicability to HNP. Pending release of remaining products. the schedule for such planned training has not yet been determined.
Edwin I Hatch Nuclear Response to NRC Generic letter Response to requests for Additional 2EI\I-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1 , 2 and
REFERENCES
----------------------------------------------------------------------------------Enclosure 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and 6 Monitor Point # 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 System 1E11 1 E11 1 E11 1E11 1E11 1 E11 1E11 1E11 1E11 1 E11 1E11 1E11 1 E11 1E11 1E11 1E11 1 E11 1E11 1E11 1E11 1 E11 P&IO H16329 H16329 H16329 H16329 H16329 H16329 H16329 H16330 H16330 H16330 H16330 H16330 H16330 H16330 H16330 H16330 H16329 H16329 H16329 H16329 H16329 Westinghouse One Line DWQ 10036099 10036099 10036099 10036099 10036099 10036099 10036099 10036003 10036003 10036003 10036003 10036003 10036003 10036003 10036003 10036003 10037019 10037019 10037019 10037019 10037019 One Line Location 1 2 3 4 5 6 7 1 2 3 4 5 6 7 8 9 1 2 3 4 5 --------------,-----c------
* Ruland, William H., "Preliminary Assessment of Responses to Generic Letter 2008-01, Managing Gas Accumulation in emergency Core Cooling, Decay Heat Removal, and Containment Spray Systems, i and Future NRC Staff Review Plans," NRC letter to James H.
Max Pipe Allowable 00 Pipe 10 Floor Access Monitoring Monitoring Void Size Room Description Vent Valves [in] [in]
Riley, Nuclear Energy Institute, ML091390637, May 28,2009.
Isometric EI Line EI Needs Insulated Method Frequency
* Riley, James H., "Generic Letter (GL) 2008-01 , "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Contain Spray Systems Evaluation and 3 Month Response Template," Letter to Administrative Points of Contact from Director, Engineering Nuclear Generation Division, Nuclear Energy Institute, Enclosure 2, "Generic Letter 2008-01 Response Guidance," March 20, 2008.
[Cu. Ft.] Questions/Comments F067 SOC SYSTEM DRYWELL SUCTION TBD 20.00 19.000 S01286 TBD 156'-6" TBD Y VENT DRAIN TBD FPCHX SYSTEM SPECTACLE FLANGE ROOM FPC SUCTION TBD 8.625 7.981 S00236 158' 186' NONE N UT DRAIN TBD ABOVE PUMP SIDE NE DIAG F006D TBD 20.00 19.000 S01211 95' 106' TBD Y UT DRAIN PUMP SIDE NE DIAG F006B TBD 20.00 19.000 S01259 95' 106' TBD Y UT DRAIN F083 FLUSH TBD SUPPLY SOC TBD 1.050 0.742 SOO060 130' 136'-11" TBD Y VENT DRAIN COMMON SOC TORUS SUCTION TBD 20.00 19.000 123'-4" TBD Y UT DRAIN F008TO F009 SYSTEM F008 IN DRYWELL ACCESS; DRYWELL SOC NONE 20.00 19.000 SOO033 130' 135' NONE Y VENT DRAIN TBD F009 IN DRYWELL F016ACONT ATTACH OUTSIDE MG SET ROOMS 6(3)RX BLDG SPRAY O/B Y 16.00 15.250 SOO037 158' 160' NONE Y VENT MONTH ON om F010 FLUSH SYSTEM ATTACH EAST WALL INTO 6(3)ACCESS SUPPLY Y 4.500 4.026 SOO052 130' 137' SCAFF Y UT DRAIN om F010 FLUSH SYSTEM ATTACH EAST WALL INTO 6(3)ACCESS SUPPLY Y 4.500 4.026 SOO052 130' 137' SCAFF Y UT DRAIN om FLUSHI SYSTEM 6(3)ACCESS TBD 20.00 19.000 S01184 130' 138'-9" TBD Y UT DRAIN TOP OF DRYWELL PUMP SIDE SE DIAG F006A TBD 20.00 19.000 SOO034 95' 97' TBD Y UT DRAIN TBD F006A ON GRATING RHR AHX STEAMCOND UTI DRAINI SE DIAG (CAPPED) TBD 20.00 19.000 SOO036 118' 122'-6" NONE Y FLUSH(1) QUARTER 6(3) BACK CORNER ATTACH INVERTED "U" AT 6(3)SE DIAG UIS F048A Y 20.00 19.000 SOO036 107' 116'-1 " SCAFF Y FLUSH QUARTER CONFLUENCE OF "A" & PUMP SIDE SE DIAG F006C NONE 24.00 22.876 SOO034 107' 113' NONE Y UT DRAIN TBD BEHIND SE DIAG D005A TBD 20.00 19.000 SOO036 95' 104'-1" SCAFF Y FLUSH QUARTER TBD ABOVE MOTORS ON CAP ON COND Y -GOES ATTACH ISO SHOWS VENT AT 193', 6(3)RX BLDG MAKEUP TOINSTR 4.500 4.026 SOO054 185' 193' NONE N VENT MONTH TOP 2" CAN'T BE VENTED -----------FPCHX SYSTEM ATTACH BELOW SPECTACLE 6(3)ROOM TO FPC N 8.625 7.981 SOO054 185' 185' NONE N UT DRAIN F016B TO Y-HARD 146'-SYSTEM 6(3)RX BLDG F021B PIPED 16.00 15.250 S01169 130' 8.5" SCAFF Y UT DRAIN OW F015B TO SYSTEM ATTACH 6(3)ACCESS F0178 NONE 24.00 22.876 SOO039 130' 138'-9" SCAFF Y VENT DRAIN TOP DRYWELL ACCESS OW F3031 COND SYSTEM ATTACH 6(3)ACCESS MAKEUP 1E11F3031 4.500 4.026 130' 136 SCAFF Y UT DRAIN VENT IN DRYWELL ACCESS -------------21 i 22 Enclosure 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Monitor Point # 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 System 1E11 1 E11 1 E11 1 E11 1E21 1E21 1 E21 1 E21 1E21 1E21 1E41 1E41 1E41 1E51 1 E51 1 E51 1E51 1E21 One Line 10037D19 10037D19 10037D19 10037D19 10036D97 10036D97 10036D98 10036D98 10036D98 10036D98 10037DOO 10037DOO 10037DOO 10037D01 10037D01 10037D01 10037D01 10036D97 One Line Location 6 7 8 9 1 2 1 Room NE DIAG NE DIAG NE DIAG NE DIAG SE NE RX RX RX RCIC CSA Attachments 1, 2 and 6 Max Pipe Allowable 00 Pipe 10 Floor Access Monitoring Monitoring Void Size Description Vent Valves [in] [in] Isometric EI LineEI Needs Insulated Method Frequency (Cu. Ft.) Questions/Comments F007B TO C002B N 3.500 3.068 SOO049 87' 93 SCAFF Y FLUSH QUARTER ATTACH 6(3) MAY BE ABLE TO STAND ON PUMP DISCHARGE PIPE SYSTEM CAPONTOPB HX N (R.V. F055B) 14.00 13.250 SOO038 118' 122 NONE Y UTI FLUSH(1) DRAIN/ QUARTER ATTACH 6(3) CAP ON INSIDE TORUS ROOM WALL AT D005B ORIFICE NONE 20.00 19.000 SOO038 96' 104 SCAFF Y FLUSH QUARTER ATTACH 6(3) ABOVE PUMP MOTORS C002B/D DISCHARGE 1 E11 F3028 20.00 19.000 SOO038 107' 116 SCAFF Y UT SYSTEM DRAIN ATTACH 6(3) AT CONFLUENCE OF C002B ANDD CST SUCTION 92'-7 SYSTEM PIPE STUB CAPPED; OPEN F002A NONE 14.00 13.625 SOO073 87' 1/2" SCAFF N UT DRAIN 0.13 F002TOVENT CST SUCTION 92'-7 SYSTEM F002B NONE 14.00 13.625 TBD 87' 1/2" SCAFF N UT DRAIN 0.18 1E21F002B CST SUPPLY F030A TBD 2.375 1.939 S01315 158' 173'-10" TBD N FLUSH CYCLE ATTACH 6(3)
E1-3
CONDENSATE TRANSFER SUPPLY F030B TBD 2.375 1.939 S01312 158' 174'-3" TBD N FLUSH CYCLE ATTACH 6(3) BEHIND P005 PANEL CS A INJ LINE D003A -F005A TBD 10.75 10.020 SOO075 158' 172'-9" TBD N VENT MONTH ATTACH 6(3) OUTSIDE MG SET PLATFORM CS B INJ LINE D003B TO F005B 1E21F013B 10.75 10.020 TBD 158' 172'-9" TBD N VENT MONTH ATTACH 6(3) RWCU HX PLATFORM SYSTEM UTI DRAINI CST SUCTION F3001 16.00 15.5" H16868 119' 123'-0" NONE N FLUSH QUARTER 0.88 SYSTEM TORUS UTI DRAINI SUCTION NONE 16.00 15" H16868 87' 90'-1" NONE N FLUSH(1) QUARTER 0.10 SYSTEM UTI DRAINI DISCHARGE 1E41F3008 14.00 13.00 H16869 123' 123'-6" NONE Y VENT MONTH 4.061 MONTHI ATTACH DISCHARGE NONE 4" 3.624" H16874 114' 123'-11" SCAFF N FLUSH(1) QUARTER 6(3) INNER CATWALK BAY 1 SYSTEM CONDENSATE 93'-6 UTI DRAINI PUMP RETURN NONE 2" 2.067" S01466 87' 7/16" SCAFF N QUARTER FLUSH 0.03 TORUS 89'-8 SYSTEM SUCTION NONE 6" 6.065" H16873 87' 7/8" NONE N UT DRAIN 0.02 SYSTEM DISCHARGE NONE 4" 3.826" H16874 87' 104'-11" SCAFF N UTI FLUSH DRAIN/ QUARTER ATTACH 6(3) SYSTEM INNER CATWALK @ CST SUCTION 1E21F127 14" 13.25" H16121 117' 121'-2" TBD N UT DRAIN 0.73 COLUMN LINES R6-RJ 38 39 
 
----------
Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to requests for Additional Information Enclosure 2 Regulatory Commitment
-------------------------
 
----------- 2EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and UTOR SYSTEM IN TORUS SOUTHI 40 1E51 H16334 10037001 3i 4) RCIC CST SUCTION NONE 6" 6.065" H16108 87' 108'-7" SCAFF Y FLUSH DRAIN 0.29 SOUTHWEST SYSTEM ATTACH MAY BE REACHED FROM 21(4) 6(3)41 1 E41 H16332 10037000 HPCI DISCHARGE 1E41F3004 14" 12.500" H16869 87' 95'-10" SCAFF N FLUSH DRAIN NEARBY STAIRS SYSTEM ATTACH 43(4) 6(3)42 1E11B H16329 10037019 RHRB DISCHARGE NONE 16" 15.250" H16837 117' 119'-6" NONE Y FLUSH DRAIN NORTHEAST DIAGONAL ---------------------
Enclosure 2 RAJ Responses to NRC NRC Commitment               Type               Scheduled One-Time Action     Completion Date SNC will either submit           X           Within one year after a technical                               NRC Issuance specification based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.
i ----
E2-1
 
Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to requests for Additional Information Enclosure 3 42EI\I-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1 , 2 and 6
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6
                                                        -----           --------                             -,-----                                                               c------   ----------------
Max Pipe                                                                                                                                        Allowable Monitor                Westinghouse One Line                                                  00    Pipe 10                        Floor                Access                        Monitoring            Monitoring                  Void Size Point #  System  P&IO  One Line DWQ Location  Room        Description  Vent Valves          [in]      [in]      Isometric          EI    Line EI    Needs  Insulated                    Method          Frequency                    [Cu. Ft.]  Questions/Comments F067 SOC                                                                                                                                        SYSTEM 1       1E11  H16329  10036099        1   DRYWELL          SUCTION          TBD          20.00  19.000          S01286        TBD      156'-6"    TBD          Y                      VENT              DRAIN                      TBD FPCHX                                                                                                                                                            SYSTEM                                SPECTACLE FLANGE JUST 2        1E11 H16329  10036099        2    ROOM      FPC SUCTION          TBD          8.625    7.981          S00236        158'      186'      NONE          N
                                                                                                                                                                      -----
UT            DRAIN                      TBD      ABOVE FLOOR PUMP SIDE                                                                                                                                          SYSTEM 3        1E11 H16329  10036099        3    NE DIAG            F006D        TBD          20.00  19.000          S01211        95'      106'      TBD          Y                          UT            DRAIN                      TBD PUMP SIDE                                                                                                                                          SYSTEM 4        1E11 H16329   10036099       4    NE DIAG            F006B        TBD          20.00  19.000          S01259        95'      106'      TBD          Y  --------
UT            DRAIN
                                                                                                                                                                                                              --------
TBD F083 FLUSH                                                                                                                                          SYSTEM 5        1E11  H16329  10036099        5      TBD        SUPPLY SOC          TBD          1.050    0.742          SOO060        130'    136'-11"    TBD          Y                      VENT              DRAIN                      TBD    -------
COMMON SOC                                                                                                                                            SYSTEM 6        1E11  H16329  10036099        6    TORUS            SUCTION          TBD          20.00   19.000
                                                                                                      -------
123'-4"    TBD  -----
Y                          UT            DRAIN                      TBD F008TO F009                                                                                                                                          SYSTEM                               F008 IN DRYWELL ACCESS; 7        1E11  H16329  10036099        7  DRYWELL     -----
SOC      NONE          20.00   19.000           SOO033        130'      135'     NONE          Y                     VENT               DRAIN                     TBD     F009 IN DRYWELL F016ACONT                                                                                                                                                                    ATTACH      OUTSIDE MG SET ROOMS 1E11  H16330  10036003        1  RX BLDG        SPRAY O/B            Y          16.00  15.250          SOO037        158'     160'     NONE           Y                      VENT              MONTH                        6(3)    ON FLOOR 8
om          F010 FLUSH                                                                                                                                          SYSTEM                    ATTACH 6(3)
EAST WALL INTO OW 9      1E11  H16330  10036003        2    ACCESS            SUPPLY
                                                                -----
Y          4.500    4.026          SOO052        130'      137'      SCAFF          Y                          UT             DRAIN                               ACCESS om          F010 FLUSH                                                                                                                                          SYSTEM                    ATTACH 6(3)
EAST WALL INTO OW 10      1E11  H16330  10036003        3    ACCESS            SUPPLY          Y          4.500    4.026          SOO052        130'     137'     SCAFF          Y                         UT             DRAIN                             ACCESS QUARTERI om                                                                                                                                          FLUSHI            SYSTEM                    ATTACH 6(3) 11        1E11 H16330  10036003        4    ACCESS                            TBD         20.00  19.000          S01184        130'     138'-9"     TBD           Y                         UT            DRAIN                             TOP OF DRYWELL ACCESS PUMP SIDE                                                                                                                                          SYSTEM 12        1E11 H16330  10036003        5    SE DIAG              F006A        TBD         20.00   19.000           SOO034        95'        97'       TBD           Y                         UT             DRAIN                     TBD      F006A ON GRATING 95' RHR AHX                                                                                                                                          SYSTEM STEAMCOND                                                                                                                            UTI              DRAINI                  ATTACH 10036003        6    SE DIAG          (CAPPED)          TBD        20.00   19.000           SOO036        118'     122'-6"    NONE           Y                   FLUSH(1)          QUARTER                        6(3)   BACK CORNER 118' i
13        1E11 H16330 ATTACH      INVERTED "U" AT 1E11          10036003        7    SE DIAG        UIS F048A          Y         20.00   19.000          SOO036        107'     116'-1 "  SCAFF          Y                    FLUSH           QUARTER                        6(3)   CONFLUENCE OF "A" & "C" 14            H16330 PUMP SIDE                                                                                                                                          SYSTEM 15        1E11 H16330  10036003        8    SE DIAG            F006C      NONE          24.00  22.876          SOO034        107'       113'     NONE          Y                         UT             DRAIN                     TBD    BEHIND 1T41-B002A F034ATO 16        1E11 H16330  10036003        9    SE DIAG            D005A        TBD          20.00  19.000          SOO036        95'     104'-1"    SCAFF          Y                   FLUSH
                                                                                                                                                                                            ------- ---
QUARTER                        TBD     ABOVE MOTORS ON 95' CAP ON COND      Y - GOES                                                                                                                                                      ATTACH      ISO SHOWS VENT AT 193',
10037019        1  RX BLDG            MAKEUP    TOINSTR            4.500    4.026          SOO054        185'      193'      NONE           N                      VENT              MONTH                        6(3)   TOP 2" CAN'T BE VENTED 17        1E11 H16329                                                                                                                                                                                      ----    ------- ...:~-;;----
FPCHX                                                                                                                                                            SYSTEM                    ATTACH    BELOW SPECTACLE 1E11 H16329  10037019        2    ROOM              TO FPC          N          8.625    7.981          SOO054        185'       185'     NONE           N                          UT             DRAIN                       6(3)  FLANGE 18 F016B TO    Y-HARD                                                              146'-                                                            SYSTEM                    ATTACH 1E11          10037019        3  RX BLDG              F021B      PIPED          16.00   15.250          S01169        130'       8.5"     SCAFF         Y                           UT            DRAIN                      6(3) 19            H16329                                                              -------
OW            F015B TO                                                                                                                                        SYSTEM                    ATTACH 1E11 H16329  10037019        4   ACCESS              F0178      NONE          24.00  22.876          SOO039        130'     138'-9"    SCAFF          Y                      VENT               DRAIN                      6(3)  TOP DRYWELL ACCESS 20    -----                         ---                         -------
OW          F3031 COND                                                                                                                                          SYSTEM                   ATTACH 1E11          10037019            ACCESS            MAKEUP  1E11F3031          4.500    4.026                        130'      136      SCAFF        Y                          UT            DRAIN                      6(3)   VENT IN DRYWELL ACCESS 21            H16329                  5                                                                      -------    ------ --,--'-------------~-  ---
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6
                                                          -------------                                                                                                    -------------
Max Pipe                                                                                              Allowable Monitor                Westinghouse One Line                                          00    Pipe 10            Floor          Access            Monitoring       Monitoring          Void Size Point # System P&ID  One Line Dwg Location   Room         Description  Vent Valves  [in]    [in]  Isometric  EI  LineEI   Needs   Insulated   Method         Frequency             (Cu. Ft.)           Questions/Comments F007B TO                                                                                                                 ATTACH              MAY BE ABLE TO STAND 22  1E11  H16329  10037D19      6    NE DIAG              C002B      N     3.500   3.068     SOO049   87'     93   SCAFF       Y       FLUSH           QUARTER                 6(3)             ON PUMP DISCHARGE PIPE SYSTEM CAPONTOPB         N (R.V.                                                                   UTI               DRAIN/           ATTACH               CAP ON INSIDE TORUS 23  1E11  H16329  10037D19      7    NE DIAG                  HX  F055B)    14.00   13.250    SOO038   118'   122  NONE        Y     FLUSH(1)          QUARTER                 6(3)             ROOM WALL AT D005B                                                                                                                  ATTACH 24  1E11  H16329  10037D19      8    NE DIAG          ORIFICE    NONE      20.00   19.000   SOO038   96'     104  SCAFF       Y       FLUSH            QUARTER                6(3)           ABOVE PUMP MOTORS C002B/D                                                                                                SYSTEM            ATTACH              AT CONFLUENCE OF C002B 25  1E11  H16329  10037D19      9    NE DIAG      DISCHARGE    1E11 F3028  20.00   19.000    SOO038  107'     116  SCAFF       Y        UT               DRAIN               6(3)            ANDD
                                                                                                        ---------
CST SUCTION                                                   92'-7                                         SYSTEM                                 PIPE STUB CAPPED; OPEN 26  1E21  H16331  10036D97      1    SE DIAG              F002A    NONE     14.00   13.625   SOO073    87'     1/2" SCAFF       N         UT               DRAIN               0.13              F002TOVENT CST SUCTION                                                    92'-7                                        SYSTEM 27  1E21  H16331  10036D97      2     NE DIAG              F002B    NONE      14.00  13.625      TBD    87'     1/2" SCAFF      N         UT                DRAIN              0.18            1E21F002B MGSET        CST SUPPLY                                                                                                                    ATTACH 28  1E21  H16331  10036D98      1      RM1A                F030A      TBD     2.375   1.939   S01315    158' 173'-10" TBD       N       FLUSH               CYCLE               6(3)
                                                                                                                                                            ~~~~~~- ~~~~
CONDENSATE TRANSFER                                                                                                                    ATTACH 29  1E21  H16331  10036D98      2    RX BLDG    SUPPLY F030B        TBD     2.375    1.939    S01312    158' 174'-3" TBD       N       FLUSH              CYCLE                6(3)           BEHIND P005 PANEL CS A INJ LINE                                                                                                                ATTACH              OUTSIDE MG SET 30  1E21  H16331  10036D98      3    RX BLDG    D003A - F005A      TBD    10.75   10.020   SOO075    158' 172'-9" TBD       N       VENT             MONTH                 6(3)           PLATFORM CS B INJ LINE D003B TO                                                                                                                  ATTACH 31  1E21  H16331  10036D98      4    RX BLDG              F005B  1E21F013B  10.75  10.020      TBD    158'   172'-9" TBD        N       VENT              MONTH                6(3)            RWCU HX PLATFORM
                                                                                                                                                                                                  ~ ~~~~~~~~~-
SYSTEM UTI               DRAINI 32  1E41  H16332  10037DOO      1      HPCI      CST SUCTION       F3001    16.00   15.5"   H16868   119' 123'-0" NONE       N       FLUSH           QUARTER                 0.88 SYSTEM TORUS                                                                                UTI               DRAINI 33  1E41  H16332  10037DOO      2      HPCI          SUCTION      NONE      16.00     15"    H16868    87'   90'-1" NONE       N      FLUSH(1)        QUARTER                0.10 SYSTEM UTI              DRAINI 34  1E41  H16332  10037DOO    N/A    TORUS        DISCHARGE     1E41F3008  14.00  13.00    H16869  123'   123'-6" NONE        Y        VENT              MONTH              4.061 VENT\~}I            MONTHI            ATTACH 35  1E51  H16334  10037D01      1     TORUS        DISCHARGE      NONE        4"    3.624"    H16874  114'  123'-11" SCAFF      N      FLUSH(1)        QUARTER                  6(3)           INNER CATWALK BAY 1
~~~~~~~
SYSTEM CONDENSATE                                                     93'-6                       UTI               DRAINI 36  1E51  H16335  10037D01      2      RCIC    PUMP RETURN       NONE       2"   2.067"   S01466   87'   7/16" SCAFF       N     QUARTER               FLUSH               0.03 TORUS                                                 89'-8                                       SYSTEM 37  1E51  H16334  10037D01      3      RCIC          SUCTION      NONE        6"   6.065"   H16873   87'   7/8"   NONE       N         UT               DRAIN               0.02 SYSTEM UTI              DRAIN/            ATTACH 38  1E51  H16334  10037D01      4      RCIC        DISCHARGE       NONE       4"   3.826"   H16874   87' 104'-11" SCAFF       N       FLUSH           QUARTER                 6(3)
SYSTEM                                 INNER CATWALK @
39  1E21  H16331  10036D97    10(4)    CSA      CST SUCTION     1E21F127   14"   13.25"   H16121   117'   121'-2" TBD       N         UT               DRAIN               0.73             COLUMN LINES R6-RJ
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6
                -------                                       ----------                                                                                                               -------------- -----------
UTOR SYSTEM               IN TORUS SOUTHI 40         1E51       H16334             10037001     3i )
4 RCIC   CST SUCTION     NONE       6"       6.065"     H16108 87' 108' -7" SCAFF       Y   FLUSH DRAIN   0.29       SOUTHWEST SYSTEM ATTACH       MAY BE REACHED FROM 1E41        H16332            10037000    21(4)         HPCI    DISCHARGE   1E41F3004     14"       12.500"     H16869 87' 95'-10" SCAFF       N   FLUSH DRAIN   6(3)      NEARBY STAIRS 41 SYSTEM ATTACH 42        1E11B        H16329            10037019    43(4)         RHRB     DISCHARGE     NONE       16"       15.250"    H16837 117' 119'-6"  NONE        Y  FLUSH  DRAIN    6(3)      NORTHEAST DIAGONAL
                                      '-------------                                                          -------  --------------                                                                                i
                                ----
                                                      - -   --
piping IS pertormed dUring lUll pump (2)Une is partially vented during each monthly TS surveillance.
piping IS pertormed dUring lUll pump (2)Une is partially vented during each monthly TS surveillance.
(3)See maximum allowable void volume table in Attachment
(3)See maximum allowable void volume table in Attachment 6.
: 6. (4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-140, rev. 1
(4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-140, rev. 1
-----------------Enclosure 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and 6 -----------------------,--------,---------Max Pipe Allowable Monitor Westinghouse One Line OD Pipe ID Floor Line Access Monitoring Void Size Point # System P&ID One Line Dwg Location Room Description Vent Valves [il1] [In] Isometric EI EI Needs Insulated Method Frequency (Cu. Ft.) Questions/Comments DISCHARGE SYSTEM ATTACH 6(3)1 2E11A H26015 10037D04 1 NE DIAG C002A FV022 20.00 19.000 S31755 107' 114'-8" SCAFF. Y UT DRAIN CONFLUENCE OF C002NC -------'----------RHR A STEAM COND LINE SYSTEM (CAPPED) AT UTI DRAINI ATTACH CAP ON TORUS ROOM 2 2E11A H26015 10037D04 2 NE DIAG B001A HX NONE 16.00 15.250 S28396 118' 123'-8" NONE Y FLUSH(1) QUARTER 6(3) WALL NORTH END DW ACCESS, DW SYSTEM ATTACH LLRT CONNECTION BELOW 6(3)2E11A H26015 10037D04 3 ACCESS F017A TBD 24.00 22.876 S31899 130' 134'-6" NONE Y UT DRAIN F017 3 SOUTH END DW ACCESS, DW SYSTEM ATTACH LLRT CONNECTION BELOW 6(3)4 2E11B H26014 10037D04 4 ACCESS F017B 2E11F058B 24.00 22.876 S28472 130' 134'-6" NONE Y UT ----DRAIN RHR B COND LINE (CAPPED) AT UTI DRAINI 6(3)2E11B H26014 10037D04 5 SE DIAG B001B HX NONE 16.00 15.250 TBD 118' 123' NONE Y FLUSH(1) QUARTER CAPPED IN DIAGONAL 5 1------C002B/D ATTACH UPSIDE DOWN U 6(3)6 2E11B H26014 10037D04 6 SE DIAG CONFLUENCE FV021 20.00 19.000 S31754 107' 114' SCAFF. Y FLUSH QUARTER NOT PIPING UNDER SYSTEM 6(3)7A 2E11A H26014 10037D04 SHOWN TBD F016A TBD 16.00 15.250 TBD 130' TBD TBD _IB[)_ UT DRAIN -------------VERTICAL PIPING UNDER SYSTEM ATTACH RWCU HX ROOM INSIDE 6(3)7B 2E11B H26014 10037D04 7 RWCU HX F016B F036B 16.00 15.250 S31425 158' 169' SCAFF. N UT DRAIN F023 HEAD ATTACH EAST SIDE BY HI 6(3)8 2E11B H26014 10037D04 8 RX BLDG SPRAY HARD PIPE 4.500 4.026 S31419 185' 193' SCAFF. Y VENT MONTH VENTS F067 RECIRC SYSTEM JUST OFF 147' GRATING IN 9 2E11 H26015 10037D04 1 DW SUCTION SDC TBD 20.00 19.000 S28478 147' 154'-6" SCAFF. Y UT DRAIN TBD DW SYSTEM --EVEN WITH GRATING ON 10 2E11B H26014 10037D04 2 SE DIAG BELOW F006D NONE 20.00 19.000 S28406 107' 107' SCAFF. Y UT DRAIN TBD 107' SYSTEM ON 97' GRATING (MAY NEED 11 2E11B H26014 10037D04 3 SE DIAG
 
_____ -NONE 20.00 19.000 S28412 107' 110' NONE ---Y UT DRAIN TBD TQ COME FROM BELOW) SYSTEM 12 2E11A H26015 10037D04 4 NE DIAG BELOW F006A NONE 20.00 19.000 S28398 107' 112' NONE Y UT DRAIN TBD SYSTEM BACK CORNER NEED 13 2E11A H26015 10037D04 5 NE DIAG BELOW F006C NONE 20.00 19.000 $£839L 107' 107' SCAFF. Y UT DRAIN TBD SCAFF FROM 97' SYSTEM 2E11 H26015 10037D04 6 DW F008 TO F009 NONE 20.00 19.000 S28478 127' 135' SCAFF. Y UT DRAIN TBD 14 -----------------15 2E21A H26018 10037D07 1 NE DIAG E21F002A NONE 14.00 13.250 S27015 97' 100' NONE N UT DRAIN 16 2E21B H26018 10037D07 2 SE DIAG F002B NONE 14.00 13.250 S26991 97' 100 NONE N UT DRAIN CS2A INJECTION UTI DRAINI VENT(2) 17 2E21A H26018 10037D07 3 RX BLDG LINE NONE 10.7 10.020 TBD 158' 171 '-3" NONE N MONTH D003A I 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
-----Enclosure 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and 6 Max Pipe Monitor Westinghouse One Line OD PlpelD Floor Line Access Monitoring Void Point # System P&ID One Line Location Room Description Vent Valves [in] [in] Isometric EI EI Needs Insulated Method (Cu. Ft.)
Attachments 1, 2 and 6
CS2B INJECTION UTI DRAINI 18 2E21B H26018 10037D07 4 RWCU HX LINE NONE 10.75 10.020 TBD 158' 171'-3" SCAFF. N VENT(2) MONTH 6(3) DISCHARGE SYSTEM 6(3)19 2E21A H26018 10037D07 5 NE DIAG LINE NONE 12.75 12.090 TBD 118' 123'-2" NONE N UT DRAIN DISCHARGE SYSTEM 20 2E21B H26018 10037D07 6 SE DIAG LINE NONE 12.75 12.090 TBD 118' 123'-2" NONE N UT F015B COMMON I 21 2E41 H26020 10037D05 1 HPCI SUCTION NONE 14 13.25 H26839 87' 92'-6" NONE N FLUSH(1) QUARTER VENTI MONTHI 6(3)22 2E41 H26020 10037D05 2 TORUS DISCHARGE NONE 14 12.5 H26840 114' 109'-6" NONE Y FLUSH QUARTER OUTER CATWALK BAY 2 SYSTEM S.E.DIAGONAL AGAINST 23 2E51 H26023 10037D06 1 TORUS RHR SUCTION FV101 4 4.026 H26844 87' 107'-9" YES Y UT DRAIN TBD TORUS WALL DISCHARGE I ATTACH 6(3)24 2E51 H26023 10037D06 2 TORUS FEED NONE 4 3.826 H26845 114' 123'-0" YES Y FLUSH(1) QUARTER INNER TORUS BAY 25 2E51 H26024 10037D06 3 RCIC DIAG PUMP RETURN NONE 2 1.939 S31014 87' 90'-4" NONE Y FLUSH QUARTER TORUS 26 2E51 H26023 10037D06 4 RCICDIAG SUCTION NONE 6 6.065 H26844 87' 89'-5" NONE Y UT DRAIN SYSTEM ATTACH UPSTREAM OF 6(3)27 2E11A H26015 10037D04 NE DIAG DISCHARGE NONE 24 22.876" H26820 117' 121'-5" NONE FLUSH DRAIN ORIFICE 2E11 N014A SDC SUCTION UTOR SYSTEM 50(4)28 2E11A H26015 10037D04 NE DIAG TO C002C NONE 20 19.000" H26819 115' 115'-1" LADDER FLUSH DRAIN 0.58 UTOR SYSTEM 24A1B(4)29 2E51 H26023 10037D06 TORUS CST SUCTION NONE 6 6.065" H26844 87' 108'-7" SCAFF FLUSH DRAIN UTOR SYSTEM 6(3)30 2E51 H26023 10037D06 RCIC DIAG DISCHARGE NONE 4 5.761" H26845 87' 104'-1" SCAFF FLUSH DRAIN piping IS pertormed dunng tUIl pump (2)Une is partially vented during each monthly TS surveillance.
        -----         ------                   ----                                   -------                       ----                   --,---                                                         -----                        ,---------   ---
(3)See maximum allowable void volume table in Attachment
Max Pipe                                                                                                                   Allowable Monitor                 Westinghouse One Line                                                 OD     Pipe ID             Floor     Line           Access                             Monitoring                     Void Size Point # System   P&ID   One Line Dwg Location   Room         Description Vent Valves         [il1]   [In] Isometric     EI       EI           Needs           Insulated           Method             Frequency (Cu. Ft.)                     Questions/Comments DISCHARGE                                                                                                                                       SYSTEM   ATTACH FV022                 19.000   S31755   107'     114'-8"         SCAFF.                 Y               UT                 DRAIN     6(3)              CONFLUENCE OF C002NC 1      2E11A  H26015        10037D04    1      NE DIAG          C002A                      20.00                                                                                                                          -------   '---------- -------
: 6. (4)This location is detailed in Attachment 4 of Westinghouse Report L TR-SEE-III-08-141, rev. 1   2EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Attachments 1, 2 and TOTAL ALLOWABLE VOLUME(2)
RHR A STEAM COND LINE                                                                                                                                     SYSTEM (CAPPED) AT                                                                                                                   UTI               DRAINI ATTACH               CAP ON TORUS ROOM 118'   123'-8"         NONE                   Y           FLUSH(1)           QUARTER       6(3)               WALL 2      2E11A H26015        10037D04    2      NE DIAG        B001A HX      NONE          16.00  15.250    S28396 NORTH END DW ACCESS, DW                                                                                                                                                      SYSTEM   ATTACH               LLRT CONNECTION BELOW F017A           TBD         24.00   22.876   S31899     130'   134'-6"         NONE                   Y               UT                 DRAIN     6(3)              F017 3     2E11A H26015        10037D04    3      ACCESS                                                                      -----
SYSTEM INCLUDED MONITORING LOCATIONS(1)
SOUTH END DW ACCESS, DW                                                                                                                                                       SYSTEM   ATTACH               LLRT CONNECTION BELOW 2E11F058B           24.00   22.876   S28472     130'   134'-6"         NONE                   Y               UT                 DRAIN      6(3)              F017 4      2E11B H26014        10037D04    4      ACCESS            F017B                                                                                                                      ----
RELIEF VALVE LIFTING [in 3] RELIEF VALVE LIFTING [tel SUPPORT DAMAGE [in 3] SUPPORT DAMAGE [tt 3 ] lEllA 8,9,10,11,13,14 10746.3 6.219 7403.3 4.284 lEl1B 17,18,19,20,21,22,23,24,25 9976.8 5.774 9976.8 5.774 lE11B @ FPC 17,18,19,21,22,23,24,25 3276.8 1.896 5876.8 3.401 1E21A 28,30 934.2 0.541 994.2 0.575 lE21B 29,31 1014.2 0.587 1034.2 0.598 1E41 N/A N/A 2218.7 1.284 lE51 34,37 N/A N/A 2342.6 1.356 2El1A 1,2,3,7A 14062.8 8.138 15462.8 8.948 2E11B 4,5,6,7B 9362.8 5.418 9262.8 5.360 2E11B @ F023 4,5,6,7B,8 5576.8 3.227 6093.8 3.527 2E21A 17,19 270.0 0.156 910.0 0.527 2E21B 18,20 300.0 0.174 1000.0 0.579 2E41 22 N/A N/A 3518.7 2.036 2E51 24 N/A N/A 4895.6 2.833 Due to the nature of pump start (pressure wave) and void collapse water hammer phenomena, the sum of all the voids the discharge piping must be used. (2)The left hand columns provide the void size required to potentially lift the system discharge relief valve due to water hammer related pressure spikes. The right hand columns provide the void size required to potentially damage piping supports due to excessive water hammer related loading. The lower of the given values should be used as the system maximum total allowable void volume. In general, this is the volume associated with relief valve lifting.}}
RHR B STEAM COND LINE                                                                                                                                     SYSTEM (CAPPED) AT                                                                                                                   UTI               DRAINI ATTACH NONE          16.00    15.250   TBD       118'     123'           NONE                   Y           FLUSH(1)           QUARTER       6(3)              CAPPED IN DIAGONAL 5     2E11B H26014        10037D04    5      SE DIAG        B001B HX                                                                                          1------ -------
C002B/D                                                                                                                                              ATTACH               UPSIDE DOWN U AT FV021         20.00   19.000   S31754     107'     114'           SCAFF.                 Y             FLUSH             QUARTER       6(3)               CONFLUENCE 6      2E11B H26014       10037D04   6      SE DIAG    CONFLUENCE VERTICAL NOT                PIPING UNDER                                                                                                                                      SYSTEM  ATTACH 16.00   15.250   TBD       130'     TBD             TBD                                   UT                 DRAIN     6(3) 7A      2E11A H26014        10037D04 SHOWN        TBD            F016A          TBD -----
_IB[)_                                                      -------- 1-----
VERTICAL PIPING UNDER                                                                                                                                     SYSTEM   ATTACH               RWCU HX ROOM INSIDE 16.00    15.250   S31425     158'     169'           SCAFF.                 N               UT                 DRAIN     6(3)               DOOR 7B      2E11B H26014       10037D04   7    RWCU HX            F016B        F036B F023 HEAD                                                                                                                                              ATTACH                EAST SIDE BY HI POINT HARD PIPE           4.500   4.026   S31419     185'     193'           SCAFF.                 Y             VENT               MONTH     6(3)              VENTS 8      2E11B H26014        10037D04    8    RX BLDG            SPRAY F067 RECIRC                                                                                                                                     SYSTEM                         JUST OFF 147' GRATING IN 9       2E11 H26015       10037D04   1         DW     SUCTION SDC           TBD         20.00   19.000   S28478     147'   154'-6"         SCAFF.                 Y               UT                 DRAIN --
TBD                 DW SYSTEM                         EVEN WITH GRATING ON 10     2E11B H26014       10037D04   2     SE DIAG   BELOW F006D         NONE         20.00   19.000   S28406     107'     107'           SCAFF.                 Y               UT                 DRAIN     TBD                 107' SYSTEM                         ON 97' GRATING (MAY NEED 11     2E11B H26014       10037D04   3     SE DIAG   BELOWEQ()6~          NONE
                                                                          -------
20.00   19.000   S28412     107'     110'           NONE
_____ - _c_:-=--  ---
Y               UT                 DRAIN     TBD                 TQ COME FROM BELOW)
SYSTEM 12     2E11A H26015       10037D04   4     NE DIAG   BELOW F006A         NONE         20.00   19.000   S28398     107'     112'           NONE                   Y               UT                 DRAIN     TBD SYSTEM                         BACK CORNER NEED 13     2E11A H26015       10037D04   5     NE DIAG   BELOW F006C         NONE         20.00   19.000   $£839L     107'     107'           SCAFF.                 Y               UT                 DRAIN     TBD                 SCAFF FROM 97' SYSTEM 14      2E11 H26015       10037D04   6         DW     F008 TO F009
                                                          -----
NONE         20.00   19.000   S28478     127'     135'           SCAFF.                 Y               UT
                                                                                                                                                                                            ------------ 1---
DRAIN    TBD SYSTEM 15     2E21A H26018       10037D07   1     NE DIAG         E21F002A       NONE         14.00   13.250   S27015     97'     100'           NONE                   N               UT                 DRAIN     TBD SYSTEM 16     2E21B H26018       10037D07   2     SE DIAG           F002B         NONE         14.00   13.250   S26991     97'     100             NONE                   N               UT                 DRAIN     TBD CS2A                                                                                                                                     SYSTEM INJECTION                                                                                                                   UTI               DRAINI ATTACH VENT(2)                        6(3) 17     2E21A H26018       10037D07   3     RX BLDG           LINE         NONE         10.7     10.020     TBD     158'   171 '-3"         NONE                   N
                                                                                                                                                                                    -----~-=
MONTH                        D003A                      I
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6
                                                                                  ~~~~~~~-
c-~~~~~                                                                                                                                                                                                          ~~~~- ~~~
Max Pipe                                                                                           Allowable Monitor                           Westinghouse   One Line                                           OD     PlpelD                 Floor   Line       Access               Monitoring           Void Size Point #   System       P&ID     One Line Dw~    Location   Room       Description     Vent Valves [in]     [in] Isometric         EI     EI         Needs     Insulated Method   Frequency~  (Cu. Ft.)       Questions/Comments CS2B                                                                                                           SYSTEM INJECTION                                                                                                 UTI     DRAINI   ATTACH 18     2E21B     H26018       10037D07         4     RWCU HX         LINE           NONE     10.75   10.020       TBD         158' 171'-3"     SCAFF.         N       VENT(2)   MONTH         6(3)         D003B CS2A DISCHARGE                                                                                                         SYSTEM   ATTACH 19     2E21A     H26018       10037D07         5     NE DIAG       LINE           NONE     12.75   12.090       TBD       118'   123'-2"       NONE           N         UT       DRAIN       6(3)          F015A CS2B DISCHARGE                                                                                                         SYSTEM   ATTACH 20     2E21B     H26018       10037D07           6     SE DIAG       LINE           NONE     12.75   12.090       TBD       118' 123'-2"       NONE           N         UT       DRAIN        6(3)          F015B
                                                                                                                                                    ~- I-----~~~~~ ~ ~
COMMON 21     2E41     H26020       10037D05           1     HPCI       SUCTION         NONE       14     13.25   H26839         87'   92'-6"       NONE           N     FLUSH(1) QUARTER       TBD                                I VENTI     MONTHI   ATTACH 22     2E41     H26020       10037D05         2     TORUS       DISCHARGE         NONE       14     12.5   H26840       114'   109'-6"       NONE           Y       FLUSH   QUARTER       6(3)        OUTER CATWALK BAY 2 SYSTEM                     S.E.DIAGONAL AGAINST 23     2E51     H26023       10037D06           1     TORUS     RHR SUCTION       FV101       4     4.026   H26844         87'   107'-9"         YES         Y         UT       DRAIN       TBD           TORUS WALL DISCHARGE I                                                                                                                 ATTACH 24     2E51     H26023       10037D06           2     TORUS         FEED           NONE         4     3.826   H26845         114' 123'-0"         YES         Y     FLUSH(1) QUARTER       6(3)          INNER TORUS BAY 9 CONDENSATE 25     2E51     H26024       10037D06           3   RCIC DIAG PUMP RETURN         NONE         2     1.939   S31014         87'   90'-4"       NONE           Y       FLUSH   QUARTER       0.02 TORUS                                                                                                           SYSTEM 26     2E51     H26023       10037D06           4   RCICDIAG     SUCTION         NONE         6     6.065   H26844         87'   89'-5"       NONE           Y         UT       DRAIN       0.03 SYSTEM   ATTACH           UPSTREAM OF FLOW 27     2E11A     H26015       10037D04         42(4)  NE DIAG     DISCHARGE         NONE       24   22.876"   H26820       117'   121'-5"       NONE           Y      FLUSH     DRAIN       6(3)        ORIFICE 2E11 N014A SDC SUCTION                                                                                             UTOR     SYSTEM 28    2E11A      H26015      10037D04        50(4)   NE DIAG     TO C002C         NONE       20   19.000"   H26819       115'   115'-1"     LADDER           Y      FLUSH     DRAIN       0.58 UTOR     SYSTEM 29      2E51      H26023      10037D06      24A1B(4) TORUS     CST SUCTION       NONE         6   6.065"   H26844         87'   108'-7"     SCAFF           Y      FLUSH     DRAIN       0.09 UTOR     SYSTEM   ATTACH 30     2E51     H26023       10037D06         34(4)  RCIC DIAG   DISCHARGE         NONE         4   5.761"   H26845         87'   104'-1"     SCAFF           Y      FLUSH     DRAIN       6(3)
          ~~      ~              ~
                                                - --
piping IS pertormed dunng tUIl pump
                                                            --                                                  ~~~~-  ~~~~~~~-~~~~ ~~~~~~~~
(2)Une is partially vented during each monthly TS surveillance.
(3)See maximum allowable void volume table in Attachment 6.
(4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-141, rev. 1
 
Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""
Attachments 1, 2 and 6 TOTAL ALLOWABLE VOLUME(2)
LOAD              LOAD INCLUDED MONITORING         RELIEF VALVE            RELIEF VALVE SYSTEM                                                                                  SUPPORT            SUPPORT LOCATIONS(1)           LIFTING [in 3]           LIFTING [tel DAMAGE [in 3]     DAMAGE [tt 3 ]
lEllA               8,9,10,11,13,14           10746.3                 6.219             7403.3             4.284 lEl1B         17,18,19,20,21,22,23,24,25       9976.8                   5.774             9976.8             5.774 lE11B @ FPC         17,18,19,21,22,23,24,25       3276.8                   1.896           5876.8             3.401 1E21A                   28,30                 934.2                   0.541             994.2             0.575 lE21B                   29,31                 1014.2                 0.587             1034.2             0.598 1E41                                           N/A                     N/A             2218.7             1.284 lE51                   34,37                   N/A                     N/A             2342.6             1.356 2El1A                   1,2,3,7A               14062.8                   8.138           15462.8             8.948 2E11B                   4,5,6,7B               9362.8                   5.418           9262.8             5.360 2E11B @ F023               4,5,6,7B,8             5576.8                   3.227           6093.8             3.527 2E21A                   17,19                 270.0                   0.156             910.0             0.527 2E21B                     18,20                 300.0                   0.174             1000.0             0.579 2E41                     22                   N/A                     N/A             3518.7             2.036 2E51                     24                   N/A                     N/A             4895.6             2.833 Due to the nature of pump start (pressure wave) and void collapse water hammer phenomena, the sum of all the voids the discharge piping must be used.
(2)The left hand columns provide the void size required to potentially lift the system discharge relief valve due to water hammer related pressure spikes. The right hand columns provide the void size required to potentially damage piping supports due to excessive water hammer related loading. The lower of the given values should be used as the system maximum total allowable void volume. In general, this is the volume associated with relief valve lifting.}}

Revision as of 00:32, 14 November 2019

Response to NRC Generic Letter 2008-01, Response to Requests for Additional Information
ML093480120
Person / Time
Site: Hatch  Southern Nuclear icon.png
Issue date: 12/14/2009
From: Ajluni M
Southern Nuclear Operating Co
To:
Document Control Desk, Office of Nuclear Reactor Regulation
References
GL-08-001, NL-09-1803
Download: ML093480120 (16)
v • d • e


Text

Southern Nucieat Operating Company, Inc SOUTHERN COMPANY A

December 14, 2009 Docket Nos.: 50-321 NL-09-1B03 50-366 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Response to NRC Generic Letter 200B-01 Response to Requests for Additional Information Ladies and Gentlemen:

On October 10, 200B (NL-OB-1340) SNC submitted the nine-month response to Generic Letter 2008-01 and on August 24, 2009 (NL-09-1 067) SNC submitted for the Edwin I Hatch Nuclear Plant(HNP) Unit 2 post-outage response to Nuclear Regulatory Commission (NRC) Generic Letter 2008-01. In a letter dated November 5, 2009 the NRC submitted a request for additional information concerning the latter response referenced above. The requested response date was 45 days from the calendar date of the letter.

The enclosure to this letter contains the SNC response to the referenced NRC request for additional information.

This letter contains an NRC commitment.

u.s Nuclear Regulat01Y Commission NL-09-J803 Page 2 Mr. M. J. Ajluni states he is Nuclear Licensing Manager of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and to the best of his knowledge and belief, the facts set forth in this letter are true.

If you have any questions, please advise.

Sincerely,

~~~

M. J. Ajluni Manager, Nuclear Licensing Sworn to and subscribed before me this -LL day of f1u,~ ,2009.

~oJf~~ Notary Public My commission expires: ///0 t.//J.o13 MJA/PAHliac

Enclosures:

1. RAI Responses to NRC.
2. Regulatory Commitment for Submitting TS Change after TSTF Approval by NRC.
3. Attachments 1,2, and 6 of 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems."

U.S Nuclear Regulatory Commission NL-09-1803 Page 3 cc: Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. D. R. Madison, Vice President Hatch Ms. P. M. Marino, Vice President Engineering RTYPE: CHA02.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Ms. D. N. Wright, NRR Project Manager Hatch Mr. E. D. Morris, Senior Resident Inspector - Hatch

Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to Requests for Additional Information Enclosure 1 RAI Responses to NRC

Enclosure I RAJ Responses to NRC REQUEST FOR ADDITIONAL INFORMATION Guidance on Nuclear Regulatory Commission (NRC) staff expectations is provided by Reference 1 which is generally consistent with Nuclear Energy Institute (NEI) guidance provided to industry in Reference 2 as clarified in later NEI communications. The NRC staff recommends that the licensee consult Reference 1 when responding to the following RAls:

1. Provide a regulatory commitment and a schedule for applying the Technical Specification Task Force (TSTF) process to any Technical Specification (TS) changes resulting from GL 2008-01.

Response: SNC has provided a regulatory commitment in Enclosure 2 to review any TSTF issued by the NRC concerning gas intrusion. SNC will either submit a technical specification change based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.

2. SNC letter dated August 24, 2009 states that the procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" was implemented on November 19, 2008. The NRC staff requests the following additional information relative to this procedure:

a) Summarize the monitored locations along with the associated surveillance methods:

Response: Details for monitoring method and frequency along with point details for each monitoring location are provided in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure 3.

b) Discuss the surveillance intervals for the monitored locations, including justifications for surveillance intervals greater than a month; Response: The applicable system piping was reviewed as per Generic Letter 2008-01 and critical locations were identified where voids could accumulate and the venting process could be challenged. The review concluded that none of the critical locations have active gas accumulation mechanisms.

The Hatch Monitoring Program is focused around these critical locations. The monitoring takes credit for the monthly activity that is performed by Operations as per the Technical Specification surveillance for venting of ECCS systems. The program also takes credit for dynamic flushing that occurs as a result of the quarterly ECCS flow surveillances. All of the monitored locations are vented or dynamically flushed anytime that the section of piping is drained such as for maintenance activities. Confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.

The surveillance intervals for the monitored locations are contained in Attachments 1 and 2 of Enclosure 3. Justification for frequencies longer than monthly are based on the lack of an active gas accumUlation mechanism, dynamic flushing as a result of quarterly flow surveillances, and confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.

E1-1

Enclosure 1 RAI Responses to NRC Procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" provides an allowance to modify this frequency based on the results of previous gas monitoring results. If a void is identified during the routine monitoring, the frequency is evaluated to determine if an increase (or shorter monitoring period) is warranted.

c) Provide the surveillance criteria.

The surveillance acceptance criteria are specified in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure 3.

d) Discuss actions to be taken if surveillance criteria are not met.

Response: Plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," requires that for any identified voids that exceed the allowable size, a condition report is initiated and the Operations Shift Manager and/or the Shift Supervisor is immediately notified. If any voids are identified at any monitoring point that does not have an approved maximum allowable limit, either a formal evaluation will be performed or the void will be removed by venting or flushing. The impact on system operability will be addressed as a result of normal processing of the condition report by the on-shift operations personnel. In addition, Engineering personnel are immediately notified to perform an evaluation.

e) State whether all voids identified will be quantified, recorded, and entered into the Corrective Action Program (CAP).

Response: Per plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," all identified voids, including the measured size, are recorded in a data package and a condition report generated to enter the information into the Corrective Action Program.

3. Describe any process improvements made to guard against gas intrusion due to inadvertent draining, system realignments, incorrect maintenance procedures, or other evolutions.

Plant evolutions involving system re-alignment or specific component manipulation that could result in inadvertent draining or inadvertent gas intrusion are controlled by plant procedures and performed only by trained plant staff. This includes system draining, tagouts, and system restoration fill and vent activities.

The HNP plant procedures applicable to these evolutions (Operations, Maintenance, and Instrument and Controls) were independently reviewed for improvements that could be made to address issues related to Generic Letter 2008-01. The review included such areas as vent scope, proper system vent sequence, precautions and limitations, potential gas accumulation mechanisms, documentations of voids identified, etc. From this review, resulting recommendations were evaluated by the plant staff and incorporated into the procedures as deemed appropriate.

Simplified piping elevation drawings were created as aids to be used by Operations and Engineering personnel to develop vent and/or ultrasonic testing (UT) plans.

E1-2

Enclosure 1 RAI Responses to NRC Additional vents have been added in Hatch Unit 2 piping locations that were determined not to have adequate venting capability. Vents will be added to Hatch Unit 1 in similar locations during the Spring 2010 refueling outage.

Operations, maintenance, and engineering personnel have been trained on the issues related to gas accumulation, including the potential causes and impact. This training also included the procedural changes described above.

4. Training was not identified in the GL but is considered to be a necessary part of applying procedures and other activities when addressing the issues identified in the GL Briefly discuss training.

Response: Training on Gas Accumulation and Management has been provided into the HNP continuing training process and provided to Operations and Maintenance personnel as part of the response to INPO SER 02-05, "Gas Intrusion in Safety Systems." This training focused on the potential for gas accumulation mechanisms and negative impact of voiding on system performance and reliability.

Several Operations and Engineering procedures have been developed or revised as a result of the response activities to Generic Letter 2008-01. When any station procedure is modified, an assessment for training needs and change management is required in accordance with HNP procedure DI-TRN-61-1006, "Training Request Worksheet."

In addition, selected site personnel have been trained and qualified on the use of UT equipment to perform void detection.

SNC is an active participant in the NEI Gas Accumulation Team, which is currently coordinating with the Institute of Nuclear Power Operations in the development of generic training modules for gas accumulation and management. These training modules target the Engineering, Operations, and Maintenance disciplines. The first module has been received by HNP and will be evaluated in the first quarter of 2010 for incorporation into the site personnel training processes in a version tailored to meet the station needs as per DI-TRN 61-1006, "Training RequestWorksheef." As the remainder of the training modules are completed and become available to the industry, SNC will evaluate them for applicability to HNP. Pending release of remaining products. the schedule for such planned training has not yet been determined.

REFERENCES

Riley, Nuclear Energy Institute, ML091390637, May 28,2009.

  • Riley, James H., "Generic Letter (GL) 2008-01 , "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Contain Spray Systems Evaluation and 3 Month Response Template," Letter to Administrative Points of Contact from Director, Engineering Nuclear Generation Division, Nuclear Energy Institute, Enclosure 2, "Generic Letter 2008-01 Response Guidance," March 20, 2008.

E1-3

Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to requests for Additional Information Enclosure 2 Regulatory Commitment

Enclosure 2 RAJ Responses to NRC NRC Commitment Type Scheduled One-Time Action Completion Date SNC will either submit X Within one year after a technical NRC Issuance specification based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.

E2-1

Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to requests for Additional Information Enclosure 3 42EI\I-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1 , 2 and 6

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

-------- -,----- c------ ----------------

Max Pipe Allowable Monitor Westinghouse One Line 00 Pipe 10 Floor Access Monitoring Monitoring Void Size Point # System P&IO One Line DWQ Location Room Description Vent Valves [in] [in] Isometric EI Line EI Needs Insulated Method Frequency [Cu. Ft.] Questions/Comments F067 SOC SYSTEM 1 1E11 H16329 10036099 1 DRYWELL SUCTION TBD 20.00 19.000 S01286 TBD 156'-6" TBD Y VENT DRAIN TBD FPCHX SYSTEM SPECTACLE FLANGE JUST 2 1E11 H16329 10036099 2 ROOM FPC SUCTION TBD 8.625 7.981 S00236 158' 186' NONE N

UT DRAIN TBD ABOVE FLOOR PUMP SIDE SYSTEM 3 1E11 H16329 10036099 3 NE DIAG F006D TBD 20.00 19.000 S01211 95' 106' TBD Y UT DRAIN TBD PUMP SIDE SYSTEM 4 1E11 H16329 10036099 4 NE DIAG F006B TBD 20.00 19.000 S01259 95' 106' TBD Y --------

UT DRAIN

TBD F083 FLUSH SYSTEM 5 1E11 H16329 10036099 5 TBD SUPPLY SOC TBD 1.050 0.742 SOO060 130' 136'-11" TBD Y VENT DRAIN TBD -------

COMMON SOC SYSTEM 6 1E11 H16329 10036099 6 TORUS SUCTION TBD 20.00 19.000

123'-4" TBD -----

Y UT DRAIN TBD F008TO F009 SYSTEM F008 IN DRYWELL ACCESS; 7 1E11 H16329 10036099 7 DRYWELL -----

SOC NONE 20.00 19.000 SOO033 130' 135' NONE Y VENT DRAIN TBD F009 IN DRYWELL F016ACONT ATTACH OUTSIDE MG SET ROOMS 1E11 H16330 10036003 1 RX BLDG SPRAY O/B Y 16.00 15.250 SOO037 158' 160' NONE Y VENT MONTH 6(3) ON FLOOR 8

om F010 FLUSH SYSTEM ATTACH 6(3)

EAST WALL INTO OW 9 1E11 H16330 10036003 2 ACCESS SUPPLY

Y 4.500 4.026 SOO052 130' 137' SCAFF Y UT DRAIN ACCESS om F010 FLUSH SYSTEM ATTACH 6(3)

EAST WALL INTO OW 10 1E11 H16330 10036003 3 ACCESS SUPPLY Y 4.500 4.026 SOO052 130' 137' SCAFF Y UT DRAIN ACCESS QUARTERI om FLUSHI SYSTEM ATTACH 6(3) 11 1E11 H16330 10036003 4 ACCESS TBD 20.00 19.000 S01184 130' 138'-9" TBD Y UT DRAIN TOP OF DRYWELL ACCESS PUMP SIDE SYSTEM 12 1E11 H16330 10036003 5 SE DIAG F006A TBD 20.00 19.000 SOO034 95' 97' TBD Y UT DRAIN TBD F006A ON GRATING 95' RHR AHX SYSTEM STEAMCOND UTI DRAINI ATTACH 10036003 6 SE DIAG (CAPPED) TBD 20.00 19.000 SOO036 118' 122'-6" NONE Y FLUSH(1) QUARTER 6(3) BACK CORNER 118' i

13 1E11 H16330 ATTACH INVERTED "U" AT 1E11 10036003 7 SE DIAG UIS F048A Y 20.00 19.000 SOO036 107' 116'-1 " SCAFF Y FLUSH QUARTER 6(3) CONFLUENCE OF "A" & "C" 14 H16330 PUMP SIDE SYSTEM 15 1E11 H16330 10036003 8 SE DIAG F006C NONE 24.00 22.876 SOO034 107' 113' NONE Y UT DRAIN TBD BEHIND 1T41-B002A F034ATO 16 1E11 H16330 10036003 9 SE DIAG D005A TBD 20.00 19.000 SOO036 95' 104'-1" SCAFF Y FLUSH

---

QUARTER TBD ABOVE MOTORS ON 95' CAP ON COND Y - GOES ATTACH ISO SHOWS VENT AT 193',

10037019 1 RX BLDG MAKEUP TOINSTR 4.500 4.026 SOO054 185' 193' NONE N VENT MONTH 6(3) TOP 2" CAN'T BE VENTED 17 1E11 H16329 ---- ------- ...:~-;;----

FPCHX SYSTEM ATTACH BELOW SPECTACLE 1E11 H16329 10037019 2 ROOM TO FPC N 8.625 7.981 SOO054 185' 185' NONE N UT DRAIN 6(3) FLANGE 18 F016B TO Y-HARD 146'- SYSTEM ATTACH 1E11 10037019 3 RX BLDG F021B PIPED 16.00 15.250 S01169 130' 8.5" SCAFF Y UT DRAIN 6(3) 19 H16329 -------

OW F015B TO SYSTEM ATTACH 1E11 H16329 10037019 4 ACCESS F0178 NONE 24.00 22.876 SOO039 130' 138'-9" SCAFF Y VENT DRAIN 6(3) TOP DRYWELL ACCESS 20 ----- --- -------

OW F3031 COND SYSTEM ATTACH 1E11 10037019 ACCESS MAKEUP 1E11F3031 4.500 4.026 130' 136 SCAFF Y UT DRAIN 6(3) VENT IN DRYWELL ACCESS 21 H16329 5 ------- ------ --,--'-------------~- ---

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

-------------

Max Pipe Allowable Monitor Westinghouse One Line 00 Pipe 10 Floor Access Monitoring Monitoring Void Size Point # System P&ID One Line Dwg Location Room Description Vent Valves [in] [in] Isometric EI LineEI Needs Insulated Method Frequency (Cu. Ft.) Questions/Comments F007B TO ATTACH MAY BE ABLE TO STAND 22 1E11 H16329 10037D19 6 NE DIAG C002B N 3.500 3.068 SOO049 87' 93 SCAFF Y FLUSH QUARTER 6(3) ON PUMP DISCHARGE PIPE SYSTEM CAPONTOPB N (R.V. UTI DRAIN/ ATTACH CAP ON INSIDE TORUS 23 1E11 H16329 10037D19 7 NE DIAG HX F055B) 14.00 13.250 SOO038 118' 122 NONE Y FLUSH(1) QUARTER 6(3) ROOM WALL AT D005B ATTACH 24 1E11 H16329 10037D19 8 NE DIAG ORIFICE NONE 20.00 19.000 SOO038 96' 104 SCAFF Y FLUSH QUARTER 6(3) ABOVE PUMP MOTORS C002B/D SYSTEM ATTACH AT CONFLUENCE OF C002B 25 1E11 H16329 10037D19 9 NE DIAG DISCHARGE 1E11 F3028 20.00 19.000 SOO038 107' 116 SCAFF Y UT DRAIN 6(3) ANDD

CST SUCTION 92'-7 SYSTEM PIPE STUB CAPPED; OPEN 26 1E21 H16331 10036D97 1 SE DIAG F002A NONE 14.00 13.625 SOO073 87' 1/2" SCAFF N UT DRAIN 0.13 F002TOVENT CST SUCTION 92'-7 SYSTEM 27 1E21 H16331 10036D97 2 NE DIAG F002B NONE 14.00 13.625 TBD 87' 1/2" SCAFF N UT DRAIN 0.18 1E21F002B MGSET CST SUPPLY ATTACH 28 1E21 H16331 10036D98 1 RM1A F030A TBD 2.375 1.939 S01315 158' 173'-10" TBD N FLUSH CYCLE 6(3)

~~~~~~- ~~~~

CONDENSATE TRANSFER ATTACH 29 1E21 H16331 10036D98 2 RX BLDG SUPPLY F030B TBD 2.375 1.939 S01312 158' 174'-3" TBD N FLUSH CYCLE 6(3) BEHIND P005 PANEL CS A INJ LINE ATTACH OUTSIDE MG SET 30 1E21 H16331 10036D98 3 RX BLDG D003A - F005A TBD 10.75 10.020 SOO075 158' 172'-9" TBD N VENT MONTH 6(3) PLATFORM CS B INJ LINE D003B TO ATTACH 31 1E21 H16331 10036D98 4 RX BLDG F005B 1E21F013B 10.75 10.020 TBD 158' 172'-9" TBD N VENT MONTH 6(3) RWCU HX PLATFORM

~ ~~~~~~~~~-

SYSTEM UTI DRAINI 32 1E41 H16332 10037DOO 1 HPCI CST SUCTION F3001 16.00 15.5" H16868 119' 123'-0" NONE N FLUSH QUARTER 0.88 SYSTEM TORUS UTI DRAINI 33 1E41 H16332 10037DOO 2 HPCI SUCTION NONE 16.00 15" H16868 87' 90'-1" NONE N FLUSH(1) QUARTER 0.10 SYSTEM UTI DRAINI 34 1E41 H16332 10037DOO N/A TORUS DISCHARGE 1E41F3008 14.00 13.00 H16869 123' 123'-6" NONE Y VENT MONTH 4.061 VENT\~}I MONTHI ATTACH 35 1E51 H16334 10037D01 1 TORUS DISCHARGE NONE 4" 3.624" H16874 114' 123'-11" SCAFF N FLUSH(1) QUARTER 6(3) INNER CATWALK BAY 1

~~~~~~~

SYSTEM CONDENSATE 93'-6 UTI DRAINI 36 1E51 H16335 10037D01 2 RCIC PUMP RETURN NONE 2" 2.067" S01466 87' 7/16" SCAFF N QUARTER FLUSH 0.03 TORUS 89'-8 SYSTEM 37 1E51 H16334 10037D01 3 RCIC SUCTION NONE 6" 6.065" H16873 87' 7/8" NONE N UT DRAIN 0.02 SYSTEM UTI DRAIN/ ATTACH 38 1E51 H16334 10037D01 4 RCIC DISCHARGE NONE 4" 3.826" H16874 87' 104'-11" SCAFF N FLUSH QUARTER 6(3)

SYSTEM INNER CATWALK @

39 1E21 H16331 10036D97 10(4) CSA CST SUCTION 1E21F127 14" 13.25" H16121 117' 121'-2" TBD N UT DRAIN 0.73 COLUMN LINES R6-RJ

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

---------- -------------- -----------

UTOR SYSTEM IN TORUS SOUTHI 40 1E51 H16334 10037001 3i )

4 RCIC CST SUCTION NONE 6" 6.065" H16108 87' 108' -7" SCAFF Y FLUSH DRAIN 0.29 SOUTHWEST SYSTEM ATTACH MAY BE REACHED FROM 1E41 H16332 10037000 21(4) HPCI DISCHARGE 1E41F3004 14" 12.500" H16869 87' 95'-10" SCAFF N FLUSH DRAIN 6(3) NEARBY STAIRS 41 SYSTEM ATTACH 42 1E11B H16329 10037019 43(4) RHRB DISCHARGE NONE 16" 15.250" H16837 117' 119'-6" NONE Y FLUSH DRAIN 6(3) NORTHEAST DIAGONAL

'------------- ------- -------------- i

- - --

piping IS pertormed dUring lUll pump (2)Une is partially vented during each monthly TS surveillance.

(3)See maximum allowable void volume table in Attachment 6.

(4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-140, rev. 1

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

------ ---- ------- ---- --,--- ----- ,--------- ---

Max Pipe Allowable Monitor Westinghouse One Line OD Pipe ID Floor Line Access Monitoring Void Size Point # System P&ID One Line Dwg Location Room Description Vent Valves [il1] [In] Isometric EI EI Needs Insulated Method Frequency (Cu. Ft.) Questions/Comments DISCHARGE SYSTEM ATTACH FV022 19.000 S31755 107' 114'-8" SCAFF. Y UT DRAIN 6(3) CONFLUENCE OF C002NC 1 2E11A H26015 10037D04 1 NE DIAG C002A 20.00 ------- '---------- -------

RHR A STEAM COND LINE SYSTEM (CAPPED) AT UTI DRAINI ATTACH CAP ON TORUS ROOM 118' 123'-8" NONE Y FLUSH(1) QUARTER 6(3) WALL 2 2E11A H26015 10037D04 2 NE DIAG B001A HX NONE 16.00 15.250 S28396 NORTH END DW ACCESS, DW SYSTEM ATTACH LLRT CONNECTION BELOW F017A TBD 24.00 22.876 S31899 130' 134'-6" NONE Y UT DRAIN 6(3) F017 3 2E11A H26015 10037D04 3 ACCESS -----

SOUTH END DW ACCESS, DW SYSTEM ATTACH LLRT CONNECTION BELOW 2E11F058B 24.00 22.876 S28472 130' 134'-6" NONE Y UT DRAIN 6(3) F017 4 2E11B H26014 10037D04 4 ACCESS F017B ----

RHR B STEAM COND LINE SYSTEM (CAPPED) AT UTI DRAINI ATTACH NONE 16.00 15.250 TBD 118' 123' NONE Y FLUSH(1) QUARTER 6(3) CAPPED IN DIAGONAL 5 2E11B H26014 10037D04 5 SE DIAG B001B HX 1------ -------

C002B/D ATTACH UPSIDE DOWN U AT FV021 20.00 19.000 S31754 107' 114' SCAFF. Y FLUSH QUARTER 6(3) CONFLUENCE 6 2E11B H26014 10037D04 6 SE DIAG CONFLUENCE VERTICAL NOT PIPING UNDER SYSTEM ATTACH 16.00 15.250 TBD 130' TBD TBD UT DRAIN 6(3) 7A 2E11A H26014 10037D04 SHOWN TBD F016A TBD -----

_IB[)_ -------- 1-----

VERTICAL PIPING UNDER SYSTEM ATTACH RWCU HX ROOM INSIDE 16.00 15.250 S31425 158' 169' SCAFF. N UT DRAIN 6(3) DOOR 7B 2E11B H26014 10037D04 7 RWCU HX F016B F036B F023 HEAD ATTACH EAST SIDE BY HI POINT HARD PIPE 4.500 4.026 S31419 185' 193' SCAFF. Y VENT MONTH 6(3) VENTS 8 2E11B H26014 10037D04 8 RX BLDG SPRAY F067 RECIRC SYSTEM JUST OFF 147' GRATING IN 9 2E11 H26015 10037D04 1 DW SUCTION SDC TBD 20.00 19.000 S28478 147' 154'-6" SCAFF. Y UT DRAIN --

TBD DW SYSTEM EVEN WITH GRATING ON 10 2E11B H26014 10037D04 2 SE DIAG BELOW F006D NONE 20.00 19.000 S28406 107' 107' SCAFF. Y UT DRAIN TBD 107' SYSTEM ON 97' GRATING (MAY NEED 11 2E11B H26014 10037D04 3 SE DIAG BELOWEQ()6~ NONE

20.00 19.000 S28412 107' 110' NONE

_____ - _c_:-=-- ---

Y UT DRAIN TBD TQ COME FROM BELOW)

SYSTEM 12 2E11A H26015 10037D04 4 NE DIAG BELOW F006A NONE 20.00 19.000 S28398 107' 112' NONE Y UT DRAIN TBD SYSTEM BACK CORNER NEED 13 2E11A H26015 10037D04 5 NE DIAG BELOW F006C NONE 20.00 19.000 $£839L 107' 107' SCAFF. Y UT DRAIN TBD SCAFF FROM 97' SYSTEM 14 2E11 H26015 10037D04 6 DW F008 TO F009

NONE 20.00 19.000 S28478 127' 135' SCAFF. Y UT

1---

DRAIN TBD SYSTEM 15 2E21A H26018 10037D07 1 NE DIAG E21F002A NONE 14.00 13.250 S27015 97' 100' NONE N UT DRAIN TBD SYSTEM 16 2E21B H26018 10037D07 2 SE DIAG F002B NONE 14.00 13.250 S26991 97' 100 NONE N UT DRAIN TBD CS2A SYSTEM INJECTION UTI DRAINI ATTACH VENT(2) 6(3) 17 2E21A H26018 10037D07 3 RX BLDG LINE NONE 10.7 10.020 TBD 158' 171 '-3" NONE N

~-=

MONTH D003A I

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

~~~~~~~-

c-~~~~~ ~~~~- ~~~

Max Pipe Allowable Monitor Westinghouse One Line OD PlpelD Floor Line Access Monitoring Void Size Point # System P&ID One Line Dw~ Location Room Description Vent Valves [in] [in] Isometric EI EI Needs Insulated Method Frequency~ (Cu. Ft.) Questions/Comments CS2B SYSTEM INJECTION UTI DRAINI ATTACH 18 2E21B H26018 10037D07 4 RWCU HX LINE NONE 10.75 10.020 TBD 158' 171'-3" SCAFF. N VENT(2) MONTH 6(3) D003B CS2A DISCHARGE SYSTEM ATTACH 19 2E21A H26018 10037D07 5 NE DIAG LINE NONE 12.75 12.090 TBD 118' 123'-2" NONE N UT DRAIN 6(3) F015A CS2B DISCHARGE SYSTEM ATTACH 20 2E21B H26018 10037D07 6 SE DIAG LINE NONE 12.75 12.090 TBD 118' 123'-2" NONE N UT DRAIN 6(3) F015B

~- I-----~~~~~ ~ ~

COMMON 21 2E41 H26020 10037D05 1 HPCI SUCTION NONE 14 13.25 H26839 87' 92'-6" NONE N FLUSH(1) QUARTER TBD I VENTI MONTHI ATTACH 22 2E41 H26020 10037D05 2 TORUS DISCHARGE NONE 14 12.5 H26840 114' 109'-6" NONE Y FLUSH QUARTER 6(3) OUTER CATWALK BAY 2 SYSTEM S.E.DIAGONAL AGAINST 23 2E51 H26023 10037D06 1 TORUS RHR SUCTION FV101 4 4.026 H26844 87' 107'-9" YES Y UT DRAIN TBD TORUS WALL DISCHARGE I ATTACH 24 2E51 H26023 10037D06 2 TORUS FEED NONE 4 3.826 H26845 114' 123'-0" YES Y FLUSH(1) QUARTER 6(3) INNER TORUS BAY 9 CONDENSATE 25 2E51 H26024 10037D06 3 RCIC DIAG PUMP RETURN NONE 2 1.939 S31014 87' 90'-4" NONE Y FLUSH QUARTER 0.02 TORUS SYSTEM 26 2E51 H26023 10037D06 4 RCICDIAG SUCTION NONE 6 6.065 H26844 87' 89'-5" NONE Y UT DRAIN 0.03 SYSTEM ATTACH UPSTREAM OF FLOW 27 2E11A H26015 10037D04 42(4) NE DIAG DISCHARGE NONE 24 22.876" H26820 117' 121'-5" NONE Y FLUSH DRAIN 6(3) ORIFICE 2E11 N014A SDC SUCTION UTOR SYSTEM 28 2E11A H26015 10037D04 50(4) NE DIAG TO C002C NONE 20 19.000" H26819 115' 115'-1" LADDER Y FLUSH DRAIN 0.58 UTOR SYSTEM 29 2E51 H26023 10037D06 24A1B(4) TORUS CST SUCTION NONE 6 6.065" H26844 87' 108'-7" SCAFF Y FLUSH DRAIN 0.09 UTOR SYSTEM ATTACH 30 2E51 H26023 10037D06 34(4) RCIC DIAG DISCHARGE NONE 4 5.761" H26845 87' 104'-1" SCAFF Y FLUSH DRAIN 6(3)

~~ ~ ~

- --

piping IS pertormed dunng tUIl pump

-- ~~~~- ~~~~~~~-~~~~ ~~~~~~~~

(2)Une is partially vented during each monthly TS surveillance.

(3)See maximum allowable void volume table in Attachment 6.

(4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-141, rev. 1

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6 TOTAL ALLOWABLE VOLUME(2)

LOAD LOAD INCLUDED MONITORING RELIEF VALVE RELIEF VALVE SYSTEM SUPPORT SUPPORT LOCATIONS(1) LIFTING [in 3] LIFTING [tel DAMAGE [in 3] DAMAGE [tt 3 ]

lEllA 8,9,10,11,13,14 10746.3 6.219 7403.3 4.284 lEl1B 17,18,19,20,21,22,23,24,25 9976.8 5.774 9976.8 5.774 lE11B @ FPC 17,18,19,21,22,23,24,25 3276.8 1.896 5876.8 3.401 1E21A 28,30 934.2 0.541 994.2 0.575 lE21B 29,31 1014.2 0.587 1034.2 0.598 1E41 N/A N/A 2218.7 1.284 lE51 34,37 N/A N/A 2342.6 1.356 2El1A 1,2,3,7A 14062.8 8.138 15462.8 8.948 2E11B 4,5,6,7B 9362.8 5.418 9262.8 5.360 2E11B @ F023 4,5,6,7B,8 5576.8 3.227 6093.8 3.527 2E21A 17,19 270.0 0.156 910.0 0.527 2E21B 18,20 300.0 0.174 1000.0 0.579 2E41 22 N/A N/A 3518.7 2.036 2E51 24 N/A N/A 4895.6 2.833 Due to the nature of pump start (pressure wave) and void collapse water hammer phenomena, the sum of all the voids the discharge piping must be used.

(2)The left hand columns provide the void size required to potentially lift the system discharge relief valve due to water hammer related pressure spikes. The right hand columns provide the void size required to potentially damage piping supports due to excessive water hammer related loading. The lower of the given values should be used as the system maximum total allowable void volume. In general, this is the volume associated with relief valve lifting.

Text

Southern Nucieat Operating Company, Inc SOUTHERN COMPANY A

December 14, 2009 Docket Nos.: 50-321 NL-09-1B03 50-366 U. S. Nuclear Regulatory Commission ATTN: Document Control Desk Washington, D. C. 20555-0001 Edwin I. Hatch Nuclear Plant Response to NRC Generic Letter 200B-01 Response to Requests for Additional Information Ladies and Gentlemen:

On October 10, 200B (NL-OB-1340) SNC submitted the nine-month response to Generic Letter 2008-01 and on August 24, 2009 (NL-09-1 067) SNC submitted for the Edwin I Hatch Nuclear Plant(HNP) Unit 2 post-outage response to Nuclear Regulatory Commission (NRC) Generic Letter 2008-01. In a letter dated November 5, 2009 the NRC submitted a request for additional information concerning the latter response referenced above. The requested response date was 45 days from the calendar date of the letter.

The enclosure to this letter contains the SNC response to the referenced NRC request for additional information.

This letter contains an NRC commitment.

u.s Nuclear Regulat01Y Commission NL-09-J803 Page 2 Mr. M. J. Ajluni states he is Nuclear Licensing Manager of Southern Nuclear Operating Company, is authorized to execute this oath on behalf of Southern Nuclear Operating Company and to the best of his knowledge and belief, the facts set forth in this letter are true.

If you have any questions, please advise.

Sincerely,

~~~

M. J. Ajluni Manager, Nuclear Licensing Sworn to and subscribed before me this -LL day of f1u,~ ,2009.

~oJf~~ Notary Public My commission expires: ///0 t.//J.o13 MJA/PAHliac

Enclosures:

1. RAI Responses to NRC.
2. Regulatory Commitment for Submitting TS Change after TSTF Approval by NRC.
3. Attachments 1,2, and 6 of 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems."

U.S Nuclear Regulatory Commission NL-09-1803 Page 3 cc: Southern Nuclear Operating Company Mr. J. T. Gasser, Executive Vice President Mr. D. R. Madison, Vice President Hatch Ms. P. M. Marino, Vice President Engineering RTYPE: CHA02.004 U. S. Nuclear Regulatory Commission Mr. L. A. Reyes, Regional Administrator Ms. D. N. Wright, NRR Project Manager Hatch Mr. E. D. Morris, Senior Resident Inspector - Hatch

Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to Requests for Additional Information Enclosure 1 RAI Responses to NRC

Enclosure I RAJ Responses to NRC REQUEST FOR ADDITIONAL INFORMATION Guidance on Nuclear Regulatory Commission (NRC) staff expectations is provided by Reference 1 which is generally consistent with Nuclear Energy Institute (NEI) guidance provided to industry in Reference 2 as clarified in later NEI communications. The NRC staff recommends that the licensee consult Reference 1 when responding to the following RAls:

1. Provide a regulatory commitment and a schedule for applying the Technical Specification Task Force (TSTF) process to any Technical Specification (TS) changes resulting from GL 2008-01.

Response: SNC has provided a regulatory commitment in Enclosure 2 to review any TSTF issued by the NRC concerning gas intrusion. SNC will either submit a technical specification change based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.

2. SNC letter dated August 24, 2009 states that the procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" was implemented on November 19, 2008. The NRC staff requests the following additional information relative to this procedure:

a) Summarize the monitored locations along with the associated surveillance methods:

Response: Details for monitoring method and frequency along with point details for each monitoring location are provided in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure 3.

b) Discuss the surveillance intervals for the monitored locations, including justifications for surveillance intervals greater than a month; Response: The applicable system piping was reviewed as per Generic Letter 2008-01 and critical locations were identified where voids could accumulate and the venting process could be challenged. The review concluded that none of the critical locations have active gas accumulation mechanisms.

The Hatch Monitoring Program is focused around these critical locations. The monitoring takes credit for the monthly activity that is performed by Operations as per the Technical Specification surveillance for venting of ECCS systems. The program also takes credit for dynamic flushing that occurs as a result of the quarterly ECCS flow surveillances. All of the monitored locations are vented or dynamically flushed anytime that the section of piping is drained such as for maintenance activities. Confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.

The surveillance intervals for the monitored locations are contained in Attachments 1 and 2 of Enclosure 3. Justification for frequencies longer than monthly are based on the lack of an active gas accumUlation mechanism, dynamic flushing as a result of quarterly flow surveillances, and confirmatory UT inspections are performed on some locations to ensure the venting or flushing was successful.

E1-1

Enclosure 1 RAI Responses to NRC Procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems" provides an allowance to modify this frequency based on the results of previous gas monitoring results. If a void is identified during the routine monitoring, the frequency is evaluated to determine if an increase (or shorter monitoring period) is warranted.

c) Provide the surveillance criteria.

The surveillance acceptance criteria are specified in 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," Attachments 1,2, and 6. A copy of these attachments is included as Enclosure 3.

d) Discuss actions to be taken if surveillance criteria are not met.

Response: Plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," requires that for any identified voids that exceed the allowable size, a condition report is initiated and the Operations Shift Manager and/or the Shift Supervisor is immediately notified. If any voids are identified at any monitoring point that does not have an approved maximum allowable limit, either a formal evaluation will be performed or the void will be removed by venting or flushing. The impact on system operability will be addressed as a result of normal processing of the condition report by the on-shift operations personnel. In addition, Engineering personnel are immediately notified to perform an evaluation.

e) State whether all voids identified will be quantified, recorded, and entered into the Corrective Action Program (CAP).

Response: Per plant procedure, 42EN-MON-001-0, "Monitoring and Trending of Gas Accumulation in Safety Injection Systems," all identified voids, including the measured size, are recorded in a data package and a condition report generated to enter the information into the Corrective Action Program.

3. Describe any process improvements made to guard against gas intrusion due to inadvertent draining, system realignments, incorrect maintenance procedures, or other evolutions.

Plant evolutions involving system re-alignment or specific component manipulation that could result in inadvertent draining or inadvertent gas intrusion are controlled by plant procedures and performed only by trained plant staff. This includes system draining, tagouts, and system restoration fill and vent activities.

The HNP plant procedures applicable to these evolutions (Operations, Maintenance, and Instrument and Controls) were independently reviewed for improvements that could be made to address issues related to Generic Letter 2008-01. The review included such areas as vent scope, proper system vent sequence, precautions and limitations, potential gas accumulation mechanisms, documentations of voids identified, etc. From this review, resulting recommendations were evaluated by the plant staff and incorporated into the procedures as deemed appropriate.

Simplified piping elevation drawings were created as aids to be used by Operations and Engineering personnel to develop vent and/or ultrasonic testing (UT) plans.

E1-2

Enclosure 1 RAI Responses to NRC Additional vents have been added in Hatch Unit 2 piping locations that were determined not to have adequate venting capability. Vents will be added to Hatch Unit 1 in similar locations during the Spring 2010 refueling outage.

Operations, maintenance, and engineering personnel have been trained on the issues related to gas accumulation, including the potential causes and impact. This training also included the procedural changes described above.

4. Training was not identified in the GL but is considered to be a necessary part of applying procedures and other activities when addressing the issues identified in the GL Briefly discuss training.

Response: Training on Gas Accumulation and Management has been provided into the HNP continuing training process and provided to Operations and Maintenance personnel as part of the response to INPO SER 02-05, "Gas Intrusion in Safety Systems." This training focused on the potential for gas accumulation mechanisms and negative impact of voiding on system performance and reliability.

Several Operations and Engineering procedures have been developed or revised as a result of the response activities to Generic Letter 2008-01. When any station procedure is modified, an assessment for training needs and change management is required in accordance with HNP procedure DI-TRN-61-1006, "Training Request Worksheet."

In addition, selected site personnel have been trained and qualified on the use of UT equipment to perform void detection.

SNC is an active participant in the NEI Gas Accumulation Team, which is currently coordinating with the Institute of Nuclear Power Operations in the development of generic training modules for gas accumulation and management. These training modules target the Engineering, Operations, and Maintenance disciplines. The first module has been received by HNP and will be evaluated in the first quarter of 2010 for incorporation into the site personnel training processes in a version tailored to meet the station needs as per DI-TRN 61-1006, "Training RequestWorksheef." As the remainder of the training modules are completed and become available to the industry, SNC will evaluate them for applicability to HNP. Pending release of remaining products. the schedule for such planned training has not yet been determined.

REFERENCES

Riley, Nuclear Energy Institute, ML091390637, May 28,2009.

  • Riley, James H., "Generic Letter (GL) 2008-01 , "Managing Gas Accumulation in Emergency Core Cooling, Decay Heat Removal, and Contain Spray Systems Evaluation and 3 Month Response Template," Letter to Administrative Points of Contact from Director, Engineering Nuclear Generation Division, Nuclear Energy Institute, Enclosure 2, "Generic Letter 2008-01 Response Guidance," March 20, 2008.

E1-3

Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to requests for Additional Information Enclosure 2 Regulatory Commitment

Enclosure 2 RAJ Responses to NRC NRC Commitment Type Scheduled One-Time Action Completion Date SNC will either submit X Within one year after a technical NRC Issuance specification based on the TSTF or submit a plant specific technical specification change for Plant Hatch within a year after the issuance of an NRC approved TSTF concerning gas intrusion.

E2-1

Edwin I Hatch Nuclear Plant Response to NRC Generic letter 2008-01 Response to requests for Additional Information Enclosure 3 42EI\I-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1 , 2 and 6

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

-------- -,----- c------ ----------------

Max Pipe Allowable Monitor Westinghouse One Line 00 Pipe 10 Floor Access Monitoring Monitoring Void Size Point # System P&IO One Line DWQ Location Room Description Vent Valves [in] [in] Isometric EI Line EI Needs Insulated Method Frequency [Cu. Ft.] Questions/Comments F067 SOC SYSTEM 1 1E11 H16329 10036099 1 DRYWELL SUCTION TBD 20.00 19.000 S01286 TBD 156'-6" TBD Y VENT DRAIN TBD FPCHX SYSTEM SPECTACLE FLANGE JUST 2 1E11 H16329 10036099 2 ROOM FPC SUCTION TBD 8.625 7.981 S00236 158' 186' NONE N

UT DRAIN TBD ABOVE FLOOR PUMP SIDE SYSTEM 3 1E11 H16329 10036099 3 NE DIAG F006D TBD 20.00 19.000 S01211 95' 106' TBD Y UT DRAIN TBD PUMP SIDE SYSTEM 4 1E11 H16329 10036099 4 NE DIAG F006B TBD 20.00 19.000 S01259 95' 106' TBD Y --------

UT DRAIN

TBD F083 FLUSH SYSTEM 5 1E11 H16329 10036099 5 TBD SUPPLY SOC TBD 1.050 0.742 SOO060 130' 136'-11" TBD Y VENT DRAIN TBD -------

COMMON SOC SYSTEM 6 1E11 H16329 10036099 6 TORUS SUCTION TBD 20.00 19.000

123'-4" TBD -----

Y UT DRAIN TBD F008TO F009 SYSTEM F008 IN DRYWELL ACCESS; 7 1E11 H16329 10036099 7 DRYWELL -----

SOC NONE 20.00 19.000 SOO033 130' 135' NONE Y VENT DRAIN TBD F009 IN DRYWELL F016ACONT ATTACH OUTSIDE MG SET ROOMS 1E11 H16330 10036003 1 RX BLDG SPRAY O/B Y 16.00 15.250 SOO037 158' 160' NONE Y VENT MONTH 6(3) ON FLOOR 8

om F010 FLUSH SYSTEM ATTACH 6(3)

EAST WALL INTO OW 9 1E11 H16330 10036003 2 ACCESS SUPPLY

Y 4.500 4.026 SOO052 130' 137' SCAFF Y UT DRAIN ACCESS om F010 FLUSH SYSTEM ATTACH 6(3)

EAST WALL INTO OW 10 1E11 H16330 10036003 3 ACCESS SUPPLY Y 4.500 4.026 SOO052 130' 137' SCAFF Y UT DRAIN ACCESS QUARTERI om FLUSHI SYSTEM ATTACH 6(3) 11 1E11 H16330 10036003 4 ACCESS TBD 20.00 19.000 S01184 130' 138'-9" TBD Y UT DRAIN TOP OF DRYWELL ACCESS PUMP SIDE SYSTEM 12 1E11 H16330 10036003 5 SE DIAG F006A TBD 20.00 19.000 SOO034 95' 97' TBD Y UT DRAIN TBD F006A ON GRATING 95' RHR AHX SYSTEM STEAMCOND UTI DRAINI ATTACH 10036003 6 SE DIAG (CAPPED) TBD 20.00 19.000 SOO036 118' 122'-6" NONE Y FLUSH(1) QUARTER 6(3) BACK CORNER 118' i

13 1E11 H16330 ATTACH INVERTED "U" AT 1E11 10036003 7 SE DIAG UIS F048A Y 20.00 19.000 SOO036 107' 116'-1 " SCAFF Y FLUSH QUARTER 6(3) CONFLUENCE OF "A" & "C" 14 H16330 PUMP SIDE SYSTEM 15 1E11 H16330 10036003 8 SE DIAG F006C NONE 24.00 22.876 SOO034 107' 113' NONE Y UT DRAIN TBD BEHIND 1T41-B002A F034ATO 16 1E11 H16330 10036003 9 SE DIAG D005A TBD 20.00 19.000 SOO036 95' 104'-1" SCAFF Y FLUSH

---

QUARTER TBD ABOVE MOTORS ON 95' CAP ON COND Y - GOES ATTACH ISO SHOWS VENT AT 193',

10037019 1 RX BLDG MAKEUP TOINSTR 4.500 4.026 SOO054 185' 193' NONE N VENT MONTH 6(3) TOP 2" CAN'T BE VENTED 17 1E11 H16329 ---- ------- ...:~-;;----

FPCHX SYSTEM ATTACH BELOW SPECTACLE 1E11 H16329 10037019 2 ROOM TO FPC N 8.625 7.981 SOO054 185' 185' NONE N UT DRAIN 6(3) FLANGE 18 F016B TO Y-HARD 146'- SYSTEM ATTACH 1E11 10037019 3 RX BLDG F021B PIPED 16.00 15.250 S01169 130' 8.5" SCAFF Y UT DRAIN 6(3) 19 H16329 -------

OW F015B TO SYSTEM ATTACH 1E11 H16329 10037019 4 ACCESS F0178 NONE 24.00 22.876 SOO039 130' 138'-9" SCAFF Y VENT DRAIN 6(3) TOP DRYWELL ACCESS 20 ----- --- -------

OW F3031 COND SYSTEM ATTACH 1E11 10037019 ACCESS MAKEUP 1E11F3031 4.500 4.026 130' 136 SCAFF Y UT DRAIN 6(3) VENT IN DRYWELL ACCESS 21 H16329 5 ------- ------ --,--'-------------~- ---

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

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Max Pipe Allowable Monitor Westinghouse One Line 00 Pipe 10 Floor Access Monitoring Monitoring Void Size Point # System P&ID One Line Dwg Location Room Description Vent Valves [in] [in] Isometric EI LineEI Needs Insulated Method Frequency (Cu. Ft.) Questions/Comments F007B TO ATTACH MAY BE ABLE TO STAND 22 1E11 H16329 10037D19 6 NE DIAG C002B N 3.500 3.068 SOO049 87' 93 SCAFF Y FLUSH QUARTER 6(3) ON PUMP DISCHARGE PIPE SYSTEM CAPONTOPB N (R.V. UTI DRAIN/ ATTACH CAP ON INSIDE TORUS 23 1E11 H16329 10037D19 7 NE DIAG HX F055B) 14.00 13.250 SOO038 118' 122 NONE Y FLUSH(1) QUARTER 6(3) ROOM WALL AT D005B ATTACH 24 1E11 H16329 10037D19 8 NE DIAG ORIFICE NONE 20.00 19.000 SOO038 96' 104 SCAFF Y FLUSH QUARTER 6(3) ABOVE PUMP MOTORS C002B/D SYSTEM ATTACH AT CONFLUENCE OF C002B 25 1E11 H16329 10037D19 9 NE DIAG DISCHARGE 1E11 F3028 20.00 19.000 SOO038 107' 116 SCAFF Y UT DRAIN 6(3) ANDD

CST SUCTION 92'-7 SYSTEM PIPE STUB CAPPED; OPEN 26 1E21 H16331 10036D97 1 SE DIAG F002A NONE 14.00 13.625 SOO073 87' 1/2" SCAFF N UT DRAIN 0.13 F002TOVENT CST SUCTION 92'-7 SYSTEM 27 1E21 H16331 10036D97 2 NE DIAG F002B NONE 14.00 13.625 TBD 87' 1/2" SCAFF N UT DRAIN 0.18 1E21F002B MGSET CST SUPPLY ATTACH 28 1E21 H16331 10036D98 1 RM1A F030A TBD 2.375 1.939 S01315 158' 173'-10" TBD N FLUSH CYCLE 6(3)

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CONDENSATE TRANSFER ATTACH 29 1E21 H16331 10036D98 2 RX BLDG SUPPLY F030B TBD 2.375 1.939 S01312 158' 174'-3" TBD N FLUSH CYCLE 6(3) BEHIND P005 PANEL CS A INJ LINE ATTACH OUTSIDE MG SET 30 1E21 H16331 10036D98 3 RX BLDG D003A - F005A TBD 10.75 10.020 SOO075 158' 172'-9" TBD N VENT MONTH 6(3) PLATFORM CS B INJ LINE D003B TO ATTACH 31 1E21 H16331 10036D98 4 RX BLDG F005B 1E21F013B 10.75 10.020 TBD 158' 172'-9" TBD N VENT MONTH 6(3) RWCU HX PLATFORM

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SYSTEM UTI DRAINI 32 1E41 H16332 10037DOO 1 HPCI CST SUCTION F3001 16.00 15.5" H16868 119' 123'-0" NONE N FLUSH QUARTER 0.88 SYSTEM TORUS UTI DRAINI 33 1E41 H16332 10037DOO 2 HPCI SUCTION NONE 16.00 15" H16868 87' 90'-1" NONE N FLUSH(1) QUARTER 0.10 SYSTEM UTI DRAINI 34 1E41 H16332 10037DOO N/A TORUS DISCHARGE 1E41F3008 14.00 13.00 H16869 123' 123'-6" NONE Y VENT MONTH 4.061 VENT\~}I MONTHI ATTACH 35 1E51 H16334 10037D01 1 TORUS DISCHARGE NONE 4" 3.624" H16874 114' 123'-11" SCAFF N FLUSH(1) QUARTER 6(3) INNER CATWALK BAY 1

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SYSTEM CONDENSATE 93'-6 UTI DRAINI 36 1E51 H16335 10037D01 2 RCIC PUMP RETURN NONE 2" 2.067" S01466 87' 7/16" SCAFF N QUARTER FLUSH 0.03 TORUS 89'-8 SYSTEM 37 1E51 H16334 10037D01 3 RCIC SUCTION NONE 6" 6.065" H16873 87' 7/8" NONE N UT DRAIN 0.02 SYSTEM UTI DRAIN/ ATTACH 38 1E51 H16334 10037D01 4 RCIC DISCHARGE NONE 4" 3.826" H16874 87' 104'-11" SCAFF N FLUSH QUARTER 6(3)

SYSTEM INNER CATWALK @

39 1E21 H16331 10036D97 10(4) CSA CST SUCTION 1E21F127 14" 13.25" H16121 117' 121'-2" TBD N UT DRAIN 0.73 COLUMN LINES R6-RJ

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

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UTOR SYSTEM IN TORUS SOUTHI 40 1E51 H16334 10037001 3i )

4 RCIC CST SUCTION NONE 6" 6.065" H16108 87' 108' -7" SCAFF Y FLUSH DRAIN 0.29 SOUTHWEST SYSTEM ATTACH MAY BE REACHED FROM 1E41 H16332 10037000 21(4) HPCI DISCHARGE 1E41F3004 14" 12.500" H16869 87' 95'-10" SCAFF N FLUSH DRAIN 6(3) NEARBY STAIRS 41 SYSTEM ATTACH 42 1E11B H16329 10037019 43(4) RHRB DISCHARGE NONE 16" 15.250" H16837 117' 119'-6" NONE Y FLUSH DRAIN 6(3) NORTHEAST DIAGONAL

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piping IS pertormed dUring lUll pump (2)Une is partially vented during each monthly TS surveillance.

(3)See maximum allowable void volume table in Attachment 6.

(4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-140, rev. 1

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

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Max Pipe Allowable Monitor Westinghouse One Line OD Pipe ID Floor Line Access Monitoring Void Size Point # System P&ID One Line Dwg Location Room Description Vent Valves [il1] [In] Isometric EI EI Needs Insulated Method Frequency (Cu. Ft.) Questions/Comments DISCHARGE SYSTEM ATTACH FV022 19.000 S31755 107' 114'-8" SCAFF. Y UT DRAIN 6(3) CONFLUENCE OF C002NC 1 2E11A H26015 10037D04 1 NE DIAG C002A 20.00 ------- '---------- -------

RHR A STEAM COND LINE SYSTEM (CAPPED) AT UTI DRAINI ATTACH CAP ON TORUS ROOM 118' 123'-8" NONE Y FLUSH(1) QUARTER 6(3) WALL 2 2E11A H26015 10037D04 2 NE DIAG B001A HX NONE 16.00 15.250 S28396 NORTH END DW ACCESS, DW SYSTEM ATTACH LLRT CONNECTION BELOW F017A TBD 24.00 22.876 S31899 130' 134'-6" NONE Y UT DRAIN 6(3) F017 3 2E11A H26015 10037D04 3 ACCESS -----

SOUTH END DW ACCESS, DW SYSTEM ATTACH LLRT CONNECTION BELOW 2E11F058B 24.00 22.876 S28472 130' 134'-6" NONE Y UT DRAIN 6(3) F017 4 2E11B H26014 10037D04 4 ACCESS F017B ----

RHR B STEAM COND LINE SYSTEM (CAPPED) AT UTI DRAINI ATTACH NONE 16.00 15.250 TBD 118' 123' NONE Y FLUSH(1) QUARTER 6(3) CAPPED IN DIAGONAL 5 2E11B H26014 10037D04 5 SE DIAG B001B HX 1------ -------

C002B/D ATTACH UPSIDE DOWN U AT FV021 20.00 19.000 S31754 107' 114' SCAFF. Y FLUSH QUARTER 6(3) CONFLUENCE 6 2E11B H26014 10037D04 6 SE DIAG CONFLUENCE VERTICAL NOT PIPING UNDER SYSTEM ATTACH 16.00 15.250 TBD 130' TBD TBD UT DRAIN 6(3) 7A 2E11A H26014 10037D04 SHOWN TBD F016A TBD -----

_IB[)_ -------- 1-----

VERTICAL PIPING UNDER SYSTEM ATTACH RWCU HX ROOM INSIDE 16.00 15.250 S31425 158' 169' SCAFF. N UT DRAIN 6(3) DOOR 7B 2E11B H26014 10037D04 7 RWCU HX F016B F036B F023 HEAD ATTACH EAST SIDE BY HI POINT HARD PIPE 4.500 4.026 S31419 185' 193' SCAFF. Y VENT MONTH 6(3) VENTS 8 2E11B H26014 10037D04 8 RX BLDG SPRAY F067 RECIRC SYSTEM JUST OFF 147' GRATING IN 9 2E11 H26015 10037D04 1 DW SUCTION SDC TBD 20.00 19.000 S28478 147' 154'-6" SCAFF. Y UT DRAIN --

TBD DW SYSTEM EVEN WITH GRATING ON 10 2E11B H26014 10037D04 2 SE DIAG BELOW F006D NONE 20.00 19.000 S28406 107' 107' SCAFF. Y UT DRAIN TBD 107' SYSTEM ON 97' GRATING (MAY NEED 11 2E11B H26014 10037D04 3 SE DIAG BELOWEQ()6~ NONE

20.00 19.000 S28412 107' 110' NONE

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Y UT DRAIN TBD TQ COME FROM BELOW)

SYSTEM 12 2E11A H26015 10037D04 4 NE DIAG BELOW F006A NONE 20.00 19.000 S28398 107' 112' NONE Y UT DRAIN TBD SYSTEM BACK CORNER NEED 13 2E11A H26015 10037D04 5 NE DIAG BELOW F006C NONE 20.00 19.000 $£839L 107' 107' SCAFF. Y UT DRAIN TBD SCAFF FROM 97' SYSTEM 14 2E11 H26015 10037D04 6 DW F008 TO F009

NONE 20.00 19.000 S28478 127' 135' SCAFF. Y UT

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DRAIN TBD SYSTEM 15 2E21A H26018 10037D07 1 NE DIAG E21F002A NONE 14.00 13.250 S27015 97' 100' NONE N UT DRAIN TBD SYSTEM 16 2E21B H26018 10037D07 2 SE DIAG F002B NONE 14.00 13.250 S26991 97' 100 NONE N UT DRAIN TBD CS2A SYSTEM INJECTION UTI DRAINI ATTACH VENT(2) 6(3) 17 2E21A H26018 10037D07 3 RX BLDG LINE NONE 10.7 10.020 TBD 158' 171 '-3" NONE N

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MONTH D003A I

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6

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Max Pipe Allowable Monitor Westinghouse One Line OD PlpelD Floor Line Access Monitoring Void Size Point # System P&ID One Line Dw~ Location Room Description Vent Valves [in] [in] Isometric EI EI Needs Insulated Method Frequency~ (Cu. Ft.) Questions/Comments CS2B SYSTEM INJECTION UTI DRAINI ATTACH 18 2E21B H26018 10037D07 4 RWCU HX LINE NONE 10.75 10.020 TBD 158' 171'-3" SCAFF. N VENT(2) MONTH 6(3) D003B CS2A DISCHARGE SYSTEM ATTACH 19 2E21A H26018 10037D07 5 NE DIAG LINE NONE 12.75 12.090 TBD 118' 123'-2" NONE N UT DRAIN 6(3) F015A CS2B DISCHARGE SYSTEM ATTACH 20 2E21B H26018 10037D07 6 SE DIAG LINE NONE 12.75 12.090 TBD 118' 123'-2" NONE N UT DRAIN 6(3) F015B

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COMMON 21 2E41 H26020 10037D05 1 HPCI SUCTION NONE 14 13.25 H26839 87' 92'-6" NONE N FLUSH(1) QUARTER TBD I VENTI MONTHI ATTACH 22 2E41 H26020 10037D05 2 TORUS DISCHARGE NONE 14 12.5 H26840 114' 109'-6" NONE Y FLUSH QUARTER 6(3) OUTER CATWALK BAY 2 SYSTEM S.E.DIAGONAL AGAINST 23 2E51 H26023 10037D06 1 TORUS RHR SUCTION FV101 4 4.026 H26844 87' 107'-9" YES Y UT DRAIN TBD TORUS WALL DISCHARGE I ATTACH 24 2E51 H26023 10037D06 2 TORUS FEED NONE 4 3.826 H26845 114' 123'-0" YES Y FLUSH(1) QUARTER 6(3) INNER TORUS BAY 9 CONDENSATE 25 2E51 H26024 10037D06 3 RCIC DIAG PUMP RETURN NONE 2 1.939 S31014 87' 90'-4" NONE Y FLUSH QUARTER 0.02 TORUS SYSTEM 26 2E51 H26023 10037D06 4 RCICDIAG SUCTION NONE 6 6.065 H26844 87' 89'-5" NONE Y UT DRAIN 0.03 SYSTEM ATTACH UPSTREAM OF FLOW 27 2E11A H26015 10037D04 42(4) NE DIAG DISCHARGE NONE 24 22.876" H26820 117' 121'-5" NONE Y FLUSH DRAIN 6(3) ORIFICE 2E11 N014A SDC SUCTION UTOR SYSTEM 28 2E11A H26015 10037D04 50(4) NE DIAG TO C002C NONE 20 19.000" H26819 115' 115'-1" LADDER Y FLUSH DRAIN 0.58 UTOR SYSTEM 29 2E51 H26023 10037D06 24A1B(4) TORUS CST SUCTION NONE 6 6.065" H26844 87' 108'-7" SCAFF Y FLUSH DRAIN 0.09 UTOR SYSTEM ATTACH 30 2E51 H26023 10037D06 34(4) RCIC DIAG DISCHARGE NONE 4 5.761" H26845 87' 104'-1" SCAFF Y FLUSH DRAIN 6(3)

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piping IS pertormed dunng tUIl pump

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(2)Une is partially vented during each monthly TS surveillance.

(3)See maximum allowable void volume table in Attachment 6.

(4)This location is detailed in Attachment 4 of Westinghouse Report LTR-SEE-III-08-141, rev. 1

Enclosure 3 42EN-MON-001-0 "Monitoring and Trending of Gas Accumulation in Safety Injection Systems""

Attachments 1, 2 and 6 TOTAL ALLOWABLE VOLUME(2)

LOAD LOAD INCLUDED MONITORING RELIEF VALVE RELIEF VALVE SYSTEM SUPPORT SUPPORT LOCATIONS(1) LIFTING [in 3] LIFTING [tel DAMAGE [in 3] DAMAGE [tt 3 ]

lEllA 8,9,10,11,13,14 10746.3 6.219 7403.3 4.284 lEl1B 17,18,19,20,21,22,23,24,25 9976.8 5.774 9976.8 5.774 lE11B @ FPC 17,18,19,21,22,23,24,25 3276.8 1.896 5876.8 3.401 1E21A 28,30 934.2 0.541 994.2 0.575 lE21B 29,31 1014.2 0.587 1034.2 0.598 1E41 N/A N/A 2218.7 1.284 lE51 34,37 N/A N/A 2342.6 1.356 2El1A 1,2,3,7A 14062.8 8.138 15462.8 8.948 2E11B 4,5,6,7B 9362.8 5.418 9262.8 5.360 2E11B @ F023 4,5,6,7B,8 5576.8 3.227 6093.8 3.527 2E21A 17,19 270.0 0.156 910.0 0.527 2E21B 18,20 300.0 0.174 1000.0 0.579 2E41 22 N/A N/A 3518.7 2.036 2E51 24 N/A N/A 4895.6 2.833 Due to the nature of pump start (pressure wave) and void collapse water hammer phenomena, the sum of all the voids the discharge piping must be used.

(2)The left hand columns provide the void size required to potentially lift the system discharge relief valve due to water hammer related pressure spikes. The right hand columns provide the void size required to potentially damage piping supports due to excessive water hammer related loading. The lower of the given values should be used as the system maximum total allowable void volume. In general, this is the volume associated with relief valve lifting.

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