ML12059A080

February 17, 2012, Summary of Telephone Conference Call Held Between U.S. Nuclear Regulatory Commission and Exelon Generation Company, LLC, Concerning Request for Additional Information Pertaining to the Limerick 2-17-12 Telecon Summary

ML12059A080
Person / Time
Site:	Limerick
Issue date:	04/20/2012
From:	Robert Kuntz License Renewal Projects Branch 1
To:	Exelon Generation Co
Kuntz R
References
TAC ME6555, TAC ME6556
Download: ML12059A080 (19)

Text

UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555*0001 April 20, 2012 LICENSEE: Exelon Generation Company, LLC FACILITY: Limerick Generating Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON FEBRUARY 17, 2012, BE1WEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND EXELON GENERATION COMPANY, LLC, CONCERNING REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE LIMERICK GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC. NOS. ME6555 AND ME6556)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Exelon Generation Company, LLC held a telephone conference call on February 17, 2012, to discuss and clarify the staff's requests for additional information (RAls) concerning the Limerick Generating Station license renewal application. The telephone conference call was useful in clarifying the intent of the staffs RAls. provides a listing of the partiCipants and Enclosure 2 contains a listing of the RAls discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comm~mary.

Robert F. Kuntz enior Project Manager Projects Bran 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353

Enclosures:

1. List of Participants

2. List of Requests for Additional Information cc w/encls: Listserv

TELEPHONE CONFERENCE CALL LIMERICK GENERATING STATION LICENSE RENEWAL APPLICATION LIST OF PARTICIPANTS February 17, 2011 PARTICIPANTS AFFILIATIONS Robert Kuntz Nuclear Regulatory Commission (NRC)

Garry Armstrong NRC Ed Smith NRC Christopher Wilson Exelon Generation Company, LLC (Exelon)

Gene Kelly Exelon Jim Jordan Exelon Mary Kowalski Exelon Mark Miller Exelon Ron Hess Exelon ENCLOSURE 1

ORAl 2.2-1 The scoping criteria are described in Section 2.1 of license renewal application (LRA). LRA Section 2.2, Table 2.2-1, "Scoping Results," provides the results of applying the license renewal scoping criteria to systems, structures, and components (SSCs). The following systems, as described in the Updated Final Safety Analysis Report (UFSAR), could not be located in LRA Table 2.2-1.

UFSAR Section System 11.2.4.3.1.7 Plant Monitoring System (PMS) Plant Monitoring System 7.1.2.1.12 Area Radiation Monitoring Area Radiation Monitoring System System 7.1.2.1.13 Process Computer System Process Computer System Instrumentation 7.1.2.1.46 Emergency Response Facility Emergency Response Facility Data System Data System Chemistry Laboratory Air Supply and Exhaust 9.4.3.2.4 Chemistry Laboratory Expansion Systems Justify the exclusion of the above systems from Table 2.2-1.

Discussion: The applicant indicated that the request is clear, but did point out that the citation to UFSAR Section 7.1.2.1.13 "Process Computer System - Instrumentation" was addressed in a response to the NRC dated January 27,2012. The NRC staff reviewed the January 27,2012 response and confirmed that this item has been addressed. Therefore, this ORAl will be sent as a formal RAI with the exception of the citation to UFSAR Section 7.1.2.1.13.

ORAl 2.3.3-1 For the license renewal boundary drawing locations identified in the table below, the staff could not determine the basis for the change in scoping criteria from 10 CFR 54.4 (a)( 1) to 10 CFR 54.4 (a)(2).

• Nonsafety-related/Safety License Renewal Boundary Explanation of Issue

. Related Interface Item Drawing Number & Location 2.3.3.17 Process Radiation Monitoring System W' SST line connected to a LR-M-26 Sheet 4, location H-6 "Sample 8" line.

2.3.3.4 Containment Enclosure Ventilation System At valves 0001A, 0002A, LR-M-78 Sheet 1, locations 0-5 a thru 0-7 and F-5 thru F-7 0003A, 0005A and 00018, 00028,00038,00058.

-2 LR-M-90 Sheet 1, locations 0 Several %" lines to vent and 1" b

2, 0-4, 0-7, E-3, G-4, drain lines.

LR-M-90 Sheet 2, Multiple All capped %" vent and drain c

locations lines.

2.3.3.8 Emergency Diesel Generator System LR-M-20 Sheets 7 and 13, At valves 1430A, 1406A, locations C-3, E-3, E-5, 0-5 1415A, 1437A, 1413A 1154A, i a and E-8 2430A,2406A,2415A,2437A, 2413A and 2154A

! LR-M-20 Sheets 4 and 10, At valves 1511A, 1510A, b locations C-3 and C-4 1509A, 2511A, 2510A and 2509A I LR-M-20 Sheets 5 and ii, At valves 1608A, 1604A, c

locations F-3 and E-5 2608A, and 2604A

! 2.3.3.19 Radwaste System LR-M-61 Sheet 1, locations G-5 a and C-5 At valves 1081 and 1082.

LR-M-61 Sheet 4, locations G-5 b At valves 2081 and 2082.

and C-5 2.3.3.21 Reactor Water Cleanup System LR-M-44 Sheet 1, Multiple Several {12 locations} 1" a locations capped lines.

I 2.3.3.22 Safety Related Service Water System a LR-M-~1 Sheet 8, location 0-5 At valve 214B.

At valve 1141 Band %" GBB LR-M-51 Sheet 4, locations 0-4 i b 123 line at valve HV-C

& 0-5 1F103B.

c LR-M-13 Sheet 2, location G-5 At valve 2066A LR-M-12 Sheet 1, Multiple Multiple 1" flush, drain and d

locations (35 locations) capped lines.

LR-M-11 Sheet 2, Multiple Multiple %" flush, drain and e locations (16 locations) capped lines.

I LR-M-11 Sheet 3, Multiple Multiple %" flush, drain and f

locations(17 locations) capped lines.

LR-M-11 Sheet 4, Multiple Multiple %,. and 1" flush, drain g

locations (32 locations) and capped lines.

LR-M-11 Sheet 5, Multiple Multiple %" and 1" flush, drain h

locations (34 locations) and capped li,.,l9s.

- 3 2.3.3.26 Water Treatment and Distribution (WTD) System At valves 0001A, 0002A, 0003A, 0005A and 0001 B, LR-M-78 Sheet 1, locations D-5 a 0002B, 0003B, 0005B without thru D-7 and F-5 thru F-7 classification break at SR-NSR interface.

Several %11 lines to vent and 1" lines to Drain without LR-M-90 Sheet 1, Locations D b classification break at the 2, D-4, D-7, E-3, F-4, G-4 valves where there is a SR NSR interface.

All capped %11 lines to vent and 1" lines to Drain without LR-M-90 Sheet 2, Several c classification break at the locations valves where there is a SR NSR interface.

Clarify the scoping classification of the pipe lines identified in the above table as within the scope of license renewal based on the criteria in 10 CFR 54.4(a)(2).

Discussion: The applicant indicated that the request is clear. This DRAI will be sent as a formal RAI.

ORAl 2.3.3-02 In LRA Section 2.1.5.2, the applicant indicates that nonsafety-related SSCs attached to safety related SSCs are in scope of license renewal for 10 CFR 54.4(a)(2) up to the first seismic anchor past the safety/nonsafety interface.

On the following license renewal boundary drawings, the staff could not locate seismic anchors on the 10 CFR 54.4(a)(2) nonsafety-related lines that are connected to safety-related lines:

Location Item License Renewal Boundary 10 CFR 54.4(a)(2) Pipe Line(s)

Drawing Number & Location or Identifier 2.3.3.1 Auxiliary Steam System 3" GBD-137 and 3" GBD-237 LR-M-50 Sheet 1 and Sheet 2, a connected to 3" EBB-109 and 3" location E-2 EBB-209, respectively.

411 GBD-136 and 4" GBD-236 LR-M-55 Sheet 1 and Sheet 2, b connected to 4" EBB-108 and 411 location C-2 EBB-208, respectively.

- 4 2.3.3.2 Closed Cooling Water System LR-M-13 Sheet 1, locations F- At valves HV108 & HV111, a

5 &G-7 respectively.

LR-M-13 Sheet 2, locations F- At valves HV208 & HV211, b

5 &G-7 res pectively.

2.3.3.4 Control Enclosure Ventilation System - Chilled Water Portion Only 1"JCD-112 line from a LR-M-78 Sheet 1, location F-1 Demineralized Water Downstream of valve 0003 from b LR-M-78 Sheet 2, location F-5 Demineralized Water 2"-JCD-112 line from c LR-M-90 Sheet 1, location E-8 Demineralized Water Downstream of valves PSV051A,PSV051B,PSV050A LR-M-90 Sheet 1, locations B-d and PSV050B, PSV049A and 5 and B-8 PSV049B, PSV048A and PSV048B LR-M-90 Sheet 1, locations A- Downstream of valves 0038A e

4 and A-6 and 0038B 2.3.3.8 Emergency Diesel Generator System LR-M-20 Sheets 3 and 9, Downstream of valves 1041 and a location 0-2 2041, respectively Four 4" HBD-365 (a)(2) lines LR-M-20 Sheets 3 and 9, b connected to (a)(1) diesel oil locations 0-2,0-3 and 0-4

_ ......... storage tanks.

2" HBD-365 and 2" HBD465 LR-M-20 Sheets 3 and 9, c location F-6 and 0-6 connected to the diesel engines and diesel-generator day tanks.

2" HBD-365 and 2" HBD465 LR-M-20 Sheets 3 and 9, d connected to the Diesel Oil location 04 and B-6 Storage Tanks.

4" HBD-365 connected to the LR-M-20 Sheets 3 and 9, e location 0-4 Diesel Oil Storage Tanks 1AT527 and 2AT527.

4" HBD-365 connected to the LR-M-20 Sheets 3 and 9, Diesel Oil Storage Tanks f

locations 0-2/3 1CT527, 1BT527, 1DT527, 2CT527, 2BT527 and 2DT527.

2" HBD-365 connected to the LR-M-20 Sheets 3 and 9, g diesel engines and diesel-location C-6 generator day tanks.

- 5 I 2.3.3.11 Fuel Pool Cooling and Cleanup System 2" HBC-133 (a)(2) line a LR-M-47 Sheet 1, location E-7 connected to 2" EBB-142 (a)(1) line.

2" HBC-233 (a)(2) line b LR-M-47 Sheet 2, location E-7 connected to 2" EBB-242 (a)(1) line.

2" JCD-101 connected to LR-M-53 Sheet 2, locations H c 6 and H-5 Skimmer Surge Tank 1AT208 and 1BT208.

2" JCD-201 connected to LR-M-53 Sheet 4, locations H d Skimmer Surge Tank 2AT208 6 and H-5 and 2BT208.

2.3.3.16 Primary Containment Ventilation System Chilled Water Portion Only At motor operated control valves LR-M-87 Sheet 4, locations A HV120A, HV120B, HV121A, a

4 through C-4 HV121B and also at HV124A, HV124B, HV125A, HV125B.

At motor operated control valves LR-M-87 Sheet 9, locations A HV220A, HV220B,HV221A, b

4 through C-4 HV221 B and also at HV224A, HV224B, HV225A, HV225B.

2.3.3.19 Radwaste System LR-M-61 Sheet 1, locations B Downstream of valves HV131 a

4 and F-4 and HV111.

Downstream of valves HV LR-M-51 Sheets 2 and 6, b 1F040 and HV2F040, location G-3 respectively.

LR-M-90 Sheet 1, locations A Downstream of valves 0038B c and 0038A, respectively.

! 4 and A-6 I 2.3.3.22 Safety Related Service Water System 4" JBD-279 line connected to the 10 CFR 54.4(a)(1) line from a LR-M-11 Sheet 1, location G-1 emergency service water pumps.

4" JBD-179 line connected to the 10 CFR 54.4(a)(1) line from b LR-M-11 Sheet 1, location G-8 emergency service water pumps.

-6 8" JBD-116 10 CFR 54.4(a)(2) c LR-M-11 Sheet 2, location A-8 line connected to 8" HBC-158 10 CFR 54.4(a)(1) line.

8" JBD-11310 CFR 54.4(a)(2) d LR-M-11 Sheet 2, location C-7 line connected to 8" HBC-138 10 CFR 54.4(a)(1) line.

6" JBD-50 line from control e LR-M-11 Sheet 2, location D-2 room chiller.

6" JBD-51 line from control room f LR-M-11 Sheet 2, location E-2 chiller.

6" JBD-50 line from control room 9 LR-M-11 Sheet 2, location F-2 chiller.

6" JBD-51 line from control

• h LR-M-11 Sheet 2, location G-2 room chiller.

10" ..IBD-139 10 CFR 54.4(a)(2) i LR-M-11 Sheet 3, location B-2 line connected to 10" HBC-152 10 CFR 54.4(a)(1) line.

8" JBD-116 10 CFR 54.4(a)(2) j LR-M-11 Sheet 3, location C-2 line connected to 8" HBC-159 10 CFR 54.4(a)(1) line.

10" JBD-113 10 CFR 54.4(a)(2) k LR-M-11 Sheet 3, location D-2 line connected to 10" HBC-166 10 CFR 54.4(a)(1} line.

8" JBD-113 10 CFR 54.4(a)(2)

I LR-M-11 Sheet 3, location E-2 line connected to 8" HBC-168 1OgFR 54.4(a)(1) line.

10" JBD-213 10 CFR 54.4(a)(2) m LR-M-11 Sheet 4, location A-5 line connected to 10" HBC-266 10 CFR 54.4(a)(1) line.

10" JBD-239 10 CFR 54.4(a)(2) n LR-M-11 Sheet 4, location A-6 line connected to 10" HBC-270 10 CFR 54.4(a)(1) line.

8" JBD-216 10 CFR 54.4(a)(2) 0 LR-M-11 Sheet 4, location C-7 line connected to 8" HBC-258 10 CFR 54.4(a)(1) line.

8" JBD-213 10 CFR 54.4(a)(2) p LR-M-11 Sheet 4, location E-7 line connected to 8" HBC-238 10 CFR 54.4(a}(1) line.

8" JBD-216 10 CFR 54.4(a)(2) q LR-M-11 Sheet 5, location C-2 line connected to 8" HBC-259 10 CFR 54.4(a)(1) line.

8" JBD-213 10 CFR 54.4(a)(2) r LR-M-11 Sheet 5, location D-2 line connected to 8" HBC-268 10 CFR 54.4(a)(1) line.

3" HBD-82 83 line connected to s LR-M-12 Sheet 1, location B-3 drain sump.

-7 3" HBD-83 82 line connected to t LR-M-12 Sheet 1, location B-6 drain sump.

3" JBD-148 10 CFR 54.4(a)(2) u LR-M-13 Sheet 1, location F-5 line connected to 3" HBB-135 10 CFR 54.4(a)(1) line.

3" JBD-150 10 CFR 54.4(a)(2) v LR-M-13 Sheet 1, location G-7 line connected to 3" HBB-138 10 CFR 54.4(a)(1) line.

3" JBD-248 10 CFR 54.4(a)(2) w LR-M-13 Sheet 2, location F-5 line connected to 3" HBB-235 10 CFR 54.4(a)(1) line.

3" ..IBD-250 10 CFR 54.4(a)(2) x LR-M-13 Sheet 2, location G-7 line connected to 3" HBB-238 10 CFR 54.4(a)(1) line.

%" GBD-275 line downstream of y LR-M-51 Sheet 8, location E-3 valve HV2F080B.

3/8" and ~" SS lines z LR-M-51 Sheet 2, location E-8 downstream of valve HV 1F080A.

aa LR-M-51 Sheet 4, loc I ;" JCD-113 line to RHR heat xchanqer 1BE205from M-18.

3/8" and ~" SS lines bb LR-M-51 Sheet 4, location F-3 downstream of valve HV 1F080B.

4" GBC-217 line downstream of cc LR-M-51 Sheet 6, location G-2 valve HV2F040.

2.3.3.26 Water Treatment and Distribution System LR-M-20 Sheet 4, location H-5 At valves 1132A and 2132A, a LR-M-20 Sheet 10, location H respectively.

5 LR-M-51 Sheet 2, location B-6 At valves HV156 b

LR-M-51 Sheet 6, location B-6 respectivelv.

Clarify the locations of the seismic anchors on the attached nonsafety-related piping for all of the systems in the above table and identify seismic anchors on attached nonsafety-related lines for all other systems not captured in the above table.

Discussion: The applicant indicated that this request had been addressed in a letter to the NRC dated January 27, 2012. The NRC staff reviewed the letter dated January 27,2012 and confirmed that these items have been addressed. Therefore, this DRAI will not be sent as a formal RAI.

ORAl 2.3.3.8-1 License renewal boundary drawings LR-M-20 Sheets 8 and 14, location F-5, depict ejector casings that are within the scope of license renewal for 10 CFR 54.4(a)(1). However, the ejector casing is not listed in Table 2.3.3-8 as a component type subject to an aging management review (AMR).

-8 Justify the exclusion of the ejector casing component type from LRA Table 2.3.3-8.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.8-2 License renewal boundary drawings LR-M-20 Sheets 8 and 14, locations 8-4 and 0-4, depict turbo charger casings that are within the scope of license renewal for 10 CFR 54.4(a)(1).

However, the turbo charger casing is not listed in Table 2.3.3-8 as a component type subject to anAMR.

Justify the exclusion of the turbo charger casing component type from LRA Table 2.3.3-8.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.8-3 License renewal boundary drawings LR-M-20 Sheets 8 and 14, location F-3, depict exhaust silencer housings that are within the scope of license renewal for 10 CFR 54.4(a)(1). However, the exhaust silencer housing is not listed in Table 2.3.3-8 as a component type subject to an AMR.

Justify the exclusion of the exhaust silencer component type from LRA Table 2.3.3-8.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.8-4 License renewal boundary drawings LR-M-20 Sheets 3 and 9, locations 0-3 and 0-7, depict flame arrestor housings that are within the scope of license renewal for 10 CFR 54.4(a)(1).

However, the flame arrestor housing that is not listed in Table 2.3.3-8 as a component type subject to an AMR.

Justify the exclusion of the flame arrestor housing component type from LRA Table 2.3.3-8.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.8-5 LRA Section 2.1.1 states that the in-scope portions of mechanical systems and structures are highlighted in color on the license renewal boundary drawings. For the Emergency Diesel Generator System, the applicant includes the diesel engines within the license renewal scoping boundary.

- 9 License renewal boundary drawings LR-M-20 Sheets 3 and 9, location F-5, depict diesel engines 1AG501 and 2AG501 as not being within the scope of license renewal. Although the applicant states in Note 7 that the in-scope fuel oil supply system boundary stops at the fuel injectors of the diesel generator due to the fuel injectors being excluded from aging management review, the license renewal boundary drawings appear to contradict the applicant's methodology for highlighting the in-scope components (the diesel engines) as described in LRA Section 2.1.1.

Justify why the diesel engines depicted on license renewal boundary drawings LR-M-20 Sheets 3 and 9 are indicated as not being within the scope of license renewal.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.12-1 License renewal boundary drawings LR-M-10 Sheets 5 and 10, locations H-2 and H-4, depict the 6" JBD-107/207 and 6" JBD-132/232 lines as being within the scope of license renewal based on the criteria in 10 CFR 54.4{a){2) with continuations to and from license renewal boundary drawings LR-M-10 Sheets 3 and 8. However, the continuations of these lines on license renewal boundary drawings, LR-M-10 Sheets 3 and 8, are depicted as not being within the scope of license renewal.

Clarify the correct scoping classification of these pipe lines.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.13-1 On license renewal boundary drawing, LR-M-64 Sheet 1, location G-8, the continuation of the pipe line depicted within the scope of license renewal could not be found in any other license renewal boundary drawings.

Locate the continuation line for the above location. If the continuation line cannot be shown on license renewal boundary drawings, then provide additional information describing the extent of the scoping boundary and verify whether or not there are additional AMR component types between the continuation and the termination of the scoping boundary. If the scoping classification of a section of the piping changes over the continuation, provide additional information to clarify the change in scoping classification.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.14-1 LRA Section 2.1 describes the applicant's scoping methodology, which specifies how systems or components were determined to be included in scope of license renewal. The staff confirms

-10 the inclusion of all components subject to AMR by reviewing the results of the screening of components within the license renewal boundary.

On license renewal boundary drawing LR-M-59 Sheet 1, location C-6, the applicant depicts Note 5, which states "This piping is included in scope out to the seismic anchor credited for structural support of the safety-related piping located as shown. The nonsafety-related piping beyond this anchor location is not in scope." However, the 1" JCO-109 pipe continues in red, designating the piping as being within the scope of license renewal for 10 CFR 54.4(a)(2), from Note 5 to the end of the pipe and including the drawing continuation marker to drawing LR-M-59 Sheet 2, at location F-1. The continuation marker on Sheet 2 also shows the pipe still in scope for 10 CFR 54.4(a)(2) and has another Note 5, the same as Sheet 1, where the transition is actually made from red to black to indicate the 1" JCO-1 09 pipe continuation changed to not being in scope for license renewal. For LGS, Unit 2, LRA drawing LR-M-59 Sheet 3, location C-6, the 1" JCO-209 pipe has the same Note 5 and there is an immediate transition from red to black, so the remainder of the pipe up to and including the continuation marker is no longer in scope as the Note 5 indicates. There also is no duplicate Note 5 on Sheet 4.

Clarify why the 1" JCO-109 pipe scope does not agree with Note 5 on LRA drawing LR-M-59 Sheet 1. Also clarify why there are differences in scoping between the 1" JCO-109 pipeline on Sheets 1 and 2 and the 1" JCO-209 pipeline on Sheets 3 and 4.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.14-02 License renewal boundary drawing LR-M-59 Sheet 3, location H-6, depicts a line not highlighted within the scope of license renewal. However, the line is connected to a continuation marker from drawing LR-M-42 Sheet 3, location A-3, which depicts the continuation marker to be highlighted green and in scope for 10 CFR 54.4(a)(1).

Clarify the scoping classification of the pipe line.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.17-01 License renewal boundary drawings LR-M-26 Sheets 1 and 7, location C-2, and LR-M-26 Sheet 4, location 8-7, depict sample chambers in Detail K that are within the scope of license renewal for 10 CFR 54.4(a)(2), but are not listed in Table 2.3.3-17 as a component type subject to an AMR.

Justify the exclusion of the sample chamber component type from LRA Table 2.3.3-17 Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.17-02 License renewal boundary drawing LR-M-26 Sheet 5, location E-3, depicts filter and detector housings in Detail G that are within the scope of license renewal for 10 CFR 54.4(a)(1), but are not listed in Table 2.3.3-17 as a component type subject to an AMR.

Justify the exclusion of the filter and detector housing component types from LRA Table 2.3.3-17.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.18-01 License renewal boundary drawings LR-M-23 Sheets 4 and 7, location H-4, depict a continuation line from the feedwater to reactor 10 CFR 54.4(a)(2) pipelines respectively to license renewal boundary drawings LR-M-06 Sheets 3 and 6, location G-8, where the pipeline continuations are shown excluded from scope of license renewal.

Clarify the scoping classification of these pipe lines.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.22-01 License renewal boundary drawing LR-M-13 Sheet 2, locations 0-2 and E-7,depicts 1%"

JB0-419 lines as being within the scope of license renewal based on the criteria in 10 CFR 54.4(a)(2), with continuations to license renewal boundary drawing LR-M-23, Sheet 7.

However, the continuations of these lines on license renewal boundary drawing LR-M-23, Sheet 7 are shown as not within the scope of license renewal.

Clarify the scoping classification of these pipe lines.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.3.22-02 License renewal boundary drawing LR-M-13, Sheet 1, locations 0-2 and 0-4, shows the 1%"

JBO-319 lines to be within the scope of license renewal for 10 CFR 54.4(a)(2), with continuations to and from the license renewal boundary drawing LR-M-23, Sheet 4. However the continuations of these lines on drawing LR-M-23, Sheet 4 are shown as not within the scope of license renewal.

Clarify the scoping classification of these pipe lines.

- 12 Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.4-01 For the license renewal boundary drawing locations identified in the table below, the staff could not determine the basis for the change in scoping criteria from 10 CFR 54.4 (a}(1) to 10 CFR 54.4 (a)(2).

Nonsafety-related/Safety- License Renewal Boundary Related Interface Item Drawing Number & Explanation of Issue Location

, 2.3.4.2 Condensate System LR-M-51 Sheet 1, Multiple a At all test connections.

locations At valves 1F041A, 1F04'1 B, LR-M-52 Sheet 1, Multiple b 1021B, 1075A, 1075B, 1076A locations and 1076B.

LR-M-52 Sheet 2, locations  %" SBO-152 drain out of pumps c

F-3 and G-3 1AP256 and 1BP256.

LR-M-52 Sheet 3, locations d At valves 2F041A and 2F041B.

E-7 and F-7 At valves 2004, 2023A, 2023B, 2027B,2027C,20270,20320, LR-M-52 Sheet 4, Multiple e 2066,2069,2075A,2075B, locations 2076,2082,2083,2084,2085, 2086, 2087 and 2088. ,

2.3.4.6 Main Steam System LR-M-01 Sheet 1, location a At valve 1030.

C-6 LR-M-01 Sheet 3, location b At valve 2030.

A-6 LR-M-41 Sheet 1, location c At valves 1038 and 1051.

A-6 At valves 1066A, 1067A, 1068A, LR-M-41 Sheet 2, locations d 1069A, 1070A, 1071A, 1072A, E-4, 0-3, 0-1 and G-8 1073A, 1037, 1040, and 1034E.

LR-M-41 Sheet 4, locations At valves 2038, 2F082B, 2063 e

A-6 & B-5 thru 0-5 and 2F083A.

LR-M-41 Sheet 5, locations f At valves, 2037, 2070, 2034E.

E-4, 0-3, 0-1 and G-8

- 13 At valves 1F053, 1F082, 1F083, 1F085, 1004, 1005, 1020, 1026, LR-M-49 Sheet 1, Multiple g 1042, 1043, 1048A, 1048B, locations 1048B, 10480, 1049B, 1049B, 1049B, 10490, and 1055.

LR-M-50 Sheet 1, location G h At valve 1043.

6 LR-M-50 Sheet 2, location H i At valve 2043.

6 At valves 1F013, 1F015, 1F044, 1F056, 1F065, 1F090, 1F091, 1F092, 1030, 1034, 1036, 1037, LR-M-55 Sheet 1, Multiple 1040,1041, 1050, 1053, 1054, j

locations 1056, 1057, 1066, 1067, 1070A, 1070B, 1070C, 10700, 1071A, 1071B, 1071C, and 10710, I 1045.

Clarify the scoping classification of the 10 CFR 54.4(a)(2) pipe lines identified in the above table.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.4-02 In LRA Section 2.1.5.2, the applicant indicates that nonsafety-related SSCs attached to safety related SSCs are in scope of license renewal for 10 CFR 54.4(a)(2) up to the first seismic anchor past the safety/nonsafety interface.

On the following license renewal boundary drawings, the staff could not locate seismic anchors on the 10 CFR 54.4(a)(2) nonsafety-related lines that are connected to safety-related lines:

Location Item License Renewal Boundary 10 CFR 54.4(a)(2) Pipe Line(s)

Drawing Number & Location or Identifier 2.3.4.2 Condensate System 2" HBO 339 and 2" HBO 439 LR-M-49 Sheet 1 and Sheet 2, a downstream of valves 1F064 location B-4 and 2F064.

4" HCO 108 and 4" HCO 208 LR-M-51 Sheet 1 and Sheet 5, b downstream of valves 1F098 location H-6 and 2F098.

2" HBO 394, downstream of LR-M-52 Sheet 1 and Sheet 3, c valve 1F029B and 2" HBO 494, location H-3 downstream of valve 2F029B

- 14

! 2" HBD 394, downstream of LR-M-52 Sheet 1 and Sheet 3, d valve 1F029A and 2" HBD 494, location G-4 downstream of valve 2F029A 6" HBD 395 and 6" HBD 495 LR-M-52 Sheet 2 and Sheet 4, e location E-7 upstream of valves 1034 and 2034.

10" HCB-208 downstream of f LR-M-55 Sheet 2, location G-4 valve HV 2F0111.

2" HBD 338 and 2" HBD 438 LR-M-55 Sheet 1 and Sheet 2, 9 upstream of valves 1F077 and location B-5 2F077.

2.3.4.6 Main Steam System a

LR-M-01 Sheet 1, locations ~tream of valves HV108, C-8, G-8 and H-8 ,HV150, and HV111.

LR-M-01 Sheet 1, locations Downstream of valves HV208, b

C-8, D-8, D-6 and H-7 HV209, HV250, and HV211.

LR-M-41 Sheets 2 and 4, Downstream of valves 1F085 c

location B-4 and 2F085.

Clarify the locations of the seismic anchors on the attached nonsafety-related piping for all of the systems in the above table. The staff also requests the applicant to identify seismic anchors on attached nonsafety-related lines for all other systems not captured in the above table.

Discussion: The applicant indicated that this request had been addressed in a letter to the NRC dated January 27,2012. The NRC staff reviewed the letter dated January 27,2012 and confirmed that these items have been addressed. Therefore, this DRAI will not be sent as a formal RAI.

ORAl 2.3.4.3-01 License renewal boundary drawings LR-M-07 Sheets 1 and 3, location H-2, depict air inlets with screens that are within the scope of license renewal for 10 CFR 54.4(a)(2), but are not listed in Table 2.3.4-3 as a component type subject to an AMR.

Justify the exclusion of the air inlet with screen component type from LRA Table 2.3.4-3.

Discussion: The applicant indicated that the request is clear. This DRAI will be sent as a formal RAI.

ORAl 2.3.4.6-01 On license renewal boundary drawing, LR-M-05 Sheet 1, locations G-3, G-4 and G-6, the continuation of the 1 '}'2" "Bearing Drain to Oily Waste" pipe from the condenser could not be found on the following license renewal boundary drawings because the drawings were not included in the license renewal boundary drawings package:

• M-19 Sheet 3

• M-19 Sheet

- 15 Provide the license renewal boundary for the 1 W' "Bearing Drain to Oily Waste" pipe for the license renewal boundary drawings described above. If the continuation line cannot be shown on these license renewal boundary drawings, then provide additional information describing the extent of the scoping boundary and verify whether or not there are additional AMR component types between the continuation and the termination of the scoping boundary. If the scoping classification of a section of the piping changes over the continuation, provide additional information to clarify the change in scoping classification.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.4.7-01 Drawing LR-M-07 Sheet 2, location F-6, shows in scope pipeline 1" HBD-359, however the continuation on this same drawing at location B-4 shows this pipeline as not in scope.

Clarify the scoping boundary of this pipe section.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

ORAl 2.3.4.7-02 License renewal boundary drawings LR-M-07 Sheets 2 and 4, location E-7, depict drain pipelines 1" HBD-359, and 1" HBD-459 within the scope of license renewal for 10 CFR 54.4(a)(2). However, license renewal boundary drawings LR-M-06 Sheets 2 and 5, location 0-8, depict the continuation lines as not being within the scope of license renewal.

Clarify the scoping boundaries for the pipe lines.

Discussion: The applicant indicated that the request is clear. This ORAl will be sent as a formal RAI.

SUBJECT:

Summary of Telephone Conference Call conducted on February 17, 2011 DISTRIBUTION:

HARD COPY:

DLRRF E-MAIL:

PUBLIC [or NON-PUBLIC, if applicable]

RidsNrrDlr Resource RidsNrrDlrRpb1 Resource RidsNrrDlrRpb2 Resource RidsNrrDlrRerb Resource RidsNrrDlrRarb Resource RidsNrrDlrRasb Resource RidsNrrDlrRapb Resource RidsNrrDlrRpob Resource RidsNrrPNILimerick Resource RidsOgcMailCenter Resource RKuntz DMorey LPerkins MSmith,OGC RConte, RI MModes, RI DiPaolo, RI NSielier, RI

LICENSEE: Exelon Generation Company, LLC FACILITY: Limerick Generating Station

SUMMARY

OF TELEPHONE CONFERENCE CALL HELD ON FEBRUARY 17, 2012, BETWEEN THE U.S. NUCLEAR REGULATORY COMMISSION AND EXELON GENERATION COMPANY, LLC, CONCERNING REQUESTS FOR ADDITIONAL INFORMATION PERTAINING TO THE LIMERICK GENERATING STATION, LICENSE RENEWAL APPLICATION (TAC. NOS. ME6555 AND ME6556)

The U.S. Nuclear Regulatory Commission (NRC or the staff) and representatives of Exelon Generation Company, LLC held a telephone conference call on February 17, 2012, to discuss and clarify the staff's requests for additional information (RAls) concerning the Limerick Generating Station license renewal application. The telephone conference call was useful in clarifying the intent of the staff's RAls. provides a listing of the participants and Enclosure 2 contains a listing of the RAls discussed with the applicant, including a brief description on the status of the items.

The applicant had an opportunity to comment on this summary.

IRA!

Robert F. Kuntz, Senior Project Manager Projects Branch 1 Division of License Renewal Office of Nuclear Reactor Regulation Docket Nos. 50-352 and 50-353

Enclosures:

1. List of Participants

2. List of Requests for Additional Information cc w/encls: Listserv DISTRIBUTION: See next page ADAMS Accession 1\10 ... ML12059a080 OFFICE LA: RPB1 :DLR PM:RPB1 :DLR BC:RPB1 :DLR PM:RPB1 :DLR NAME YEdmonds RFKuntz DMorey RFKuntz DATE 04 113/12 04113/12 041 13/12 04/20/12 OFFICIAL RECORD COpy