ML13008A075

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Inservice Inspection Summary Report, Form NIS-2 Owner'S Report for Repair/Replacement Activity, as Required by the Provisions of the ASME Code Section XI
ML13008A075
Person / Time
Site: Byron Constellation icon.png
Issue date: 01/03/2013
From:
Exelon Generation Co, Exelon Nuclear
To:
Office of Nuclear Reactor Regulation
References
Download: ML13008A075 (35)
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Text

DOCUMENT NO.: 3.1 REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI Owner Exelon Nuclear Date 9/22/12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of 1 Address

2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 00634689-01 Address Repair Organization, P.O. No., Job No., etc.
3. Work Performed by Shaw/Stone & Webster Type Code Symbol Stamp Not Applicable Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Expiration Date Not Applicable Address
4. Identification of System
5. (a) Applicable Construction Code ASME Section III 19 74 Edition, no Addenda, na Code Case (b) Applicable Edition of Section XI Used for Repair/Replacement Activity 2001 Edition / 2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of ame of anufacturer Board ther ear Installed (Yes or No)

Com ponent Manufacturer Serial No. No. Identification Built SAFETY VALVE, DRESSER BRO9600 N/A 1 MS015C 1977 Removed YES 6", 1500# INDUSTRIES SAFETY VALVE, DRESSER 1977 BR09599 N/A 1 MS015C Installed YES 6", 1500# INDUSTRIES

7. Description of Work REMOVE/REPLACE RELIEF VALVE
8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure Exempt q Other q Pressure 1096 psi Test Temp. 558 OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 81/2 in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks 00634689-01 Applicabl e Manufacturer's Data Reports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate o Authorization No. Not Applicable Signed W t to (\ AA;l,{a / / ooAA /NA-PR_ Date /L- / o , 20 12 Owner or owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hrtford, CT have jnspgcted the components described in this Owner's Report during the period

, and state that to the best of my knowledge and belief, thJOwner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage r a loss of any kind arising from or connected with this inspection.

^ Commissions ,/, $'?7' IBC/ J /^ L"i Inspector's signature National Board, State Province, and Endorsements Date: le ,20 12

DOCUMENT NO.: 3.1 REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI

1. Owner Exelon Nuclear Date 9/23/12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of 1 Address
2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 00634887-01 Address Repair Organization, P.O. No., Job No., etc.
3. Work Performed by Shaw/ Stone & Webster Type Code Symbol Stamp Not Applicable Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Expiration Date Not Applicable Address
4. Identification of System MS (MAIN STEAM)
5. (a) Applicable Construction Code ASME Section III 19 74 Edition, na Addenda, Code Case (b) Applicable Edition of Section XI Used for Repair/ Replacement Activity 2001 Edition _/ 2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of anufacturer Board ther ear Installed (Yes or No) ame of Com ponent Manufacturer Serial No. No. Identification Built SAFETY VALVE, 6", DRESSER 1 MS014D Removed YES BRO9597 N/A 1977 1500# INDUSTRIES 1 MS014D SAFETY VALVE, 6", DRESSER BU01482 N/A 1978 Installed YES 1500# INDUSTRIES Cat ID 1439909-1 Descr 7. iption of Work REPLACE RELIEF VALVE Test Conduc
8. ted: Hydrostatic q Pneumatic q Nominal Operating Pressure Exempt q Other q Pressure 1094 psi Test Temp. 558 OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 81/2 in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks 00634887-01 pplica a anu acturer s Data Reports to a attac e CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of uthorization No. Not Applicable Signed A AAAA , Ll e2N) /Nf^ j Date 20 12 Owner or Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of artford, CT have ins ec d the components described in this Owner's Report during the period to 9 , and state that to the best of my knowledge and belief, the wner has performe examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection.

Commissions ,,,^r,^Jge7" inspector's Signature National Board, State Province, and Endorsements Date: 20 /,

farr/J^/,

(Final)

DOCUMENT NO.: 3.0 REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIRS OR REPLACEMENTS As Required by the Provisions of the ASME Code Section X1 1 Owner Exelon Nuclear Date 9-13-12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of 1 Address

2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01287122-01 Address Repair Organization, P.O. No., Job No., etc.
3. Work Performed by Shaw/Stone & Webster Type Code Symbol Stamp Not Applicable Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Expiration Date Not Applicable Address
4. Identification of System CHEMICAL & VOLUME CONTROL (CV)
5. (a) Applicable Construction Code ASME Section III 19 74 Edition, S74 Addenda, 1644 Rev. 7, 1651, 1682,1683,1685,1686,1728, 1729, 1734, N-108, N-180 Code Case (b) Applicable Edition of Section XI Used for Repair/Replacement Activity 2001 Edition / 2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of ame of anufacturer Board ther ear Installed (Yes or No)

Component Manufacturer Serial No. No. Identification Built Snubber, PSA - Pacific 16676 N/A 1 CV09050S 1981 Removed YES Snubber, Lisega Lisega 3110690-007 N/A 1CV09050S 2012 Installed NO

7. Description of Work REPLACED WITH A LISEGA SNUBBER Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure q Exempt q VT-3 Other Pressure psi Test Temp. OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 8'/2 in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks WO 01287122-01 Applicable Manufacturer's Data Reports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorization No. Not Applicable Signed CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hartford, CT have insp cted the components described in this Owner's Report during the period d to / O , and state that to the best of my knowledge and belief, the wner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage e ,.a loss of any kind arising from or connected with this inspection.

Commissions /j /j , -/ /' ^ G*

Inspector's Signature National Board, State Province, and Endorsements Date: .d6L /; 2 , 2012 (Final)

4.2 REV. NO.: 0 DOCUMENT NO.:

T ACTIVITY FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMEN As Required by the Provisions of the ASME Code Sectio n XI Exelon Nuclear Date 9-22-12

1. Owner Name Sheet 1 of 1 4300 Winfield Road, Warre nville, IL Address Byron Nuclear Power Station Unit 01
2. Plant Name N. Germa n Churc h Road, Byron, IL Work Order No. 01287364-01/02 4450 Repair Organization, P.O. No., Job No., etc.

Address Type Code Symbol Stamp Not Applicable

3. Work Performed by Shaw/ Stone & Webster Name Authorization No. Not Applicable Expiration Date Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Address
4. Identification of System RY / PRESSURIZER ASME Section III 19 71 Edition, W72 Addenda, N/A Code Case
5. (a) Applicable Construction Code 2001 Edition / 2003 Addenda Activity (b) Applicable Edition of Section XI Used for Repair/Replacement (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected. Code Removed, or Stamped National ther ear Installed (Yes or No) ame of anufacturer Board ame of Identification Suitt Manufacturer Serial No. No.

Com ponent RELIEF VALVE CROSBY VALVE N56964-00-0090 N/A 1 RY8010B 1976 Removed YES 1 RY801 OB & GAGE CROSBY VALVE N56964-00-0049 1 RY8010B 1976 Installed YES RELIEF VALVE N/A

& GAGE CAT ID 1402762-1 1 RY801 OB URIZER RELIEF VALVE 1RY8010B

7. Description of Work R EMOVED / REPLACED PRESS Pneumatic q Nominal Operating Pressure Exempt q
8. Test Conducted: Hydrostatic q 2227 psi Test Temp. 649 OF Other q Pressure be used, provided (1) size is 81/2 in. x 11 in., (2)

Note: Supplemental sheets in form of lists, sketches, or drawings may and (3) each sheet is numbered and the number information in items 1 through 6 on this report is included on each sheet, of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks 01287364-01/02 Applicable Manufacturer's Data Reports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorization No. Not Applicable-Signed 41-1.?L^^^^ Date /?--/T--,20 12 Owner )r Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of art! rd, CT have i spe ted the components described in this Owner's Report during the period

, and state that toto the ,//?/best /L of my knowledge and belief, the Owner has performed ex minations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection.

Commissions rSf%' ///Jl5-S/ 4 ,^I G>>

Inspector's Signature National Board, State Province, and ndorsements Date: (^e (,i -& Je, A J " , 20 12 (Final)

8.2 REV. NO.: 0 DOCUMENT NO.:

FORM NIS- 2 OWNER'S REPORT FOR REPAIR /REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI

1. Owner Exelon Nuclear Date 9-29-12 Name Sheet 1 of 1 4300 Winfield Road, Warrenville, IL Address
2. Plant -Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01344060-01 Repair Organization, P.O. No., Job No., etc.

Address N P S & W VENTURE Type Code Symbol Stamp Not Applicable

3. Work Performed by Name Authorization No. Not Applicab le Wilming ton, IL 60481 Expiration Date Not Applicab le 36400 S. Essex Road, Address
4. Identification of System RC - REACTOR COOLANT
5. (a) Applicable Construction Code ASME Section III 19 71 Edition, W73 Addenda, 1552, 1553-1, Code 1649 Case (b) Applicab le Edition of Section XI Used for Repair/Replacement Activity 2001 Edition / 2003 Addenda (c)Section XI Code Case(s) none
6. Identification of Components ASME Corrected, Code National Removed, or Stamped Manufacturer Board Other Year Installed (Yes or No)

Name of Name of Manufacturer Serial No. No. Identification Built Component MAIN FLANGE REC. CORP HT. NO. N/A 1 RC8002B 1977 Removed NO STUD # 23 L3269 MAIN FLANGE 1 RC8002B 1977 Installed NO S/N: 10799 N/A Cat ID: 8242-1 STUD WESTINGHOUSE MAIN FLANGE JARECKI HT. NO.: N/A 1 RC8002B 1977 Removed NO NUT IND. L3229 K-12 MAIN FLANGE Lot NO.: 1 RC8002B 50372820 N/A 2012 Installed NO HYDRANUT NOVA MACHINE Cat ID: 1447511-1 HT# 846932

7. Description of Work REPLACED VALVE BODY TO BONNET STUDS AND INSTALLED NEW HYDRA-NUTS PER EC# 389812.
8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure q Exempt Other Pressure psi Test Temp. OF UT- STUDS VT-1 NUTS d (1) size Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provide report is included on each sheet, and is 81/2 in. x 11 in., (2) information in items 1 through 6 on this (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks WO# 01344060-01 Applicable Manufacturers Data Reports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorizatiop No.,, Not Applicable Signed Date %2 l 7 , 20 12 wner or Qwner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hartford, CT have inspected the components described in this Owner's Report during th; perio .

to /a and state that to the best of my knowledge and belief, the Owner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal ee orinjury or a propertyloss of any kind arising from or connected with this inspection.

Commissions inspector's Signature National Board, State Province, and Endorsements Date: llG,&'/AG 'dZw rSy' 20 12

8.2 REV. NO.: 0 DOCUMENT NO.:

FORM NIS- 2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI

1. Owner Exelon Nuclear Date 9-29-12 Name Sheet 1 of 1 4300 Winfield Road, Warrenville, IL Address
2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01344060-02 Repair Organization, P.O. No., Job No., etc.

Address Work Performed by N P S & W VENTURE Type Code Symbol Stamp Not Applicable 3.

Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Expiration Date Not Applicable Address

4. Identification of System RC - REACTOR COOLANT
5. (a) Applicable Construction Code ASME Section III 19 71 Edition, W73 Addenda, 1552, 1553-1, Code 1649 Case (b) Applicable Edition of Section XI Used for Repair/Repl acement Activity 2001 Edition / 2003 Addenda (c)Section XI Code Case(s) SEE REMARKS
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of anufacturer Board ther ear Installed (Yes or No) ame of Manufacturer Serial No. No. Identification Built Com ponent HT. NO.

McInnes Steel 11904 N/A 1 RC8002B 1977 Removed NO VALVE STEM SN: 270 1 RC8002B SN: 325 N/A 1979 Installed NO VALVE STEM WESTINGHOUSE CAT ID 8237-1

7. Description of Work REPLACED VALVE STEM
8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure q Exempt Other q Pressure __ _psi Test Temp. OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 8'/2 in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks WO# 01344060-02 Applicable Manufacturer's Data Reports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorizat' No. Not Applicable Signed Date 20 12 Owner or Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hartford, CT have inspected the components described in this Owner's Report during the period 11^ to , and state that to the best of my knowledge and belief, ner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage r a loss of any kind arising from or connected with this inspection.

769^& Commissions .rfif}is7%1 /LI, S 7 1 ,'^Z G Inspector's Signature National Board, State Province, and Endorsements Date: / 7 , 20 12

8.0 REV. NO.: 0 DOCUMENT NO.:

FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI Owner Exelon Nuclear Date 9/22/12 1.

Name Sheet 1 of 1 4300 Winfield Road, Warrenville, IL Address Plant Byron Nuclear Power Station Unit 01 2.

Name 4450 N. German Church Road, Byron, IL Work Order No. 01344060-67 Repair Organization, P.O. No., Job No., etc.

Address Shaw/Stone & Webster Type Code Symbol Stamp Not Applicable

3. Work Performed by Name Authorization No. Not Applicable Expiration Date Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Address
4. Identification of System 1S108JB 1/2" ASME Section III 19 74 Edition, S75 Addenda, N/A Code Case
5. (a) Applicable Construction Code 2001 Edition / 2003 Addenda (b) Applicable Edition of Section XI Used for Repair/ Replacement Activity (c)Section XI Code Case(s) NONE
6. Identification of Compon ents ASME Corrected, Code National Removed, or Stamped Board ther ear Installed (Yes or No) ame of ame of anufacturer Serial No. No. Identification Built Component Manufacturer NO FW-1924 N/A 1SI08JB-1-1/2" N/A Removed WELD HUNTER NO FW-1924 N/A 1SI08JB-1-1/2" 2012 Installed WELD SHAW
7. Description of Work Remove / reinstall a portion of line 1SI08JB-1-1/2" reusing existing pipe, fittings, and bolting.

Hydrostatic q Pneumatic q Nominal Operating Pressure Exempt q

8. Test Conducted:

2232 psi Test Temp. 558 OF Other q Pressure used, provided (1) size is 8 'h in. x 11 in., (2)

Note: Supplemental sheets in form of lists, sketches, or drawings may be sheet is numbered and the number information in items 1 through 6 on this report is included on each sheet, and (3) each of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks Applicable Manufacturer's Data Reports to be attachea CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of AyAorization No. Not Applicable Signed Date f8" , 20 Owner's Design , Title l

.el CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT oo ya ord, CT have i p led the components described in this Owner's Report during the period

_74K_..__.._ to , and state that to the best of my knowledge and belief, the caner has performed xaminations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code, Section Xl.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection.

Commissions Inspec tor's Signature National Board, State Province, and Endorsements Date: pGrGijt Qe/` it , 20 AA

DOCUMENT NO.: 6.0 REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI Owner Exelon Nuclear Date 9/25/12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of Address

2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01344060-69 Address Repair Organization, P.O. No., Job No., etc.
3. Work Performed by Shaw/Stone & Webster Type Code Symbol Stamp Not Applicable Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Expiration Date Not Applicable Address
4. Identification of System 1 CV15AB-3/4"
5. (a) Applicable Construction Code ASME Section III 19 74 Edition, S75 Addenda, N/A Code Case (b) Applicable Edition of Section XI Used for Repair/Replacement Activity 2001 Edition / 2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of ame of anufacturer Board ther ear Installed (Yes or No)

Component Manufacturer Serial No. No. Identification Built WELDS Hunter FW4127 N/A 1CV15AB-3/4" N/A Removed NO WELDS Shaw FW4127 N/A 1CV15AB-3/4" 2012 Installed NO WELDS Hunter FW2771 N/A 1CV15AB-3/4" N/A Removed NO WELDS Shaw FW2771 N/A 1CV15AB-3/4" 2012 Installed NO

7. Description of Work REMOVE / REINSTALL A SECTION OF 1CV15AB-3/4"
8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure Exempt q Other q Pressure 2232 psi Test Temp. 558 OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 81/2 in. x 11 in., (2) 1 information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks 01344060-69 Applicable Manufacturer's Data Reports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of AyVorization No. Not Applicable Signed Date / 2  ! Z , 20 / t-wnewner's designee, TitIa CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Flarford, CT have i pe ed the components described in this Owner's Report during the period to P _ , and state that to the best of my knowledge and belief, the Owner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection.

r___ Commissions AE . Zg l1 4^ G Inspector's Signature National Board, State Province, and Endorsements Date: .DGCe,+f^ /f , 20

10.0 REV. NO.: 0 DOCUMENT NO.:

ACTIVITY FORM NIS-2 OWNER'S REPORT FOR REPAIR /REPLACEMENT CLC As Required by the Provisions of the ASME Code Section XI 9/18/12 Exelon Nuclear Date 9-20-12 Ow 1.ner Name Sheet of 4300 Winfield Road, Warrenville, IL Address Byron Nuclear Power Station Unit 01

2. Plant Name 4450 N. German Church Road, Byron, IL Work Order No. 01380394-01 Repair Organization, P.O. No., Job No., etc.

Address Type Code Symbol Stamp Not Applicable Work Performed by Shaw/ Stone & Webster Name Authorization No. Not Applicable Expiration Date Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Address

4. Identification of System SI (SAFETY INJECTION)

, S75 Addenda, N/A Code Case

5. (a) Applicable Construction Code ASME Section III 19 74 Edition Edition / 2003 Addend a 2001 (b) Applicable Edition of Section XI Used for Repair/Replacement Activity (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code Removed, or Stamped National Board Other Year Installed (Yes or No)

Name of Name of Manufacturer Serial No. No. Identification Built Component Manufacturer N/A N/A 1 SI06BA-24" N/A Corrected Yes PIPING Hunter 7.

Descripti on of Work BASE METAL REPAIR ON PIPING

8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure q Exempt Other q Pressure psi Test Temp. OF provided (1) size is 81/2 in. x 11 in., (2)

Note: Supplemental sheets in form of lists, sketches, or drawings may be used, each sheet is numbered and the number information in items 1 through 6 on this report is included on each sheet, and (3) of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks J/ -- !i/5?' - a/

Applicable Mannufac re s Dat-a-Reports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Certificate of Authorization No. Not A Signed CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hartford, CT have i spected the components described in this Owner's Report during the period to and state that to the best of my knowledge and belief, the Owner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection.

Commissions /00J5 3S et,6 ',,-

Inspector's Signature National Board, State Province, and Endorsements Date: Oe° e'flfjc'-/' /3 , 20 12

REV. NO.: 0 DOCUMENT NO.: 4A PLACEMENT ACTIVITY FORM NIS - 2 OWNER'S REPORT FOR REPAIRIRE n XI As Required by the Provisions of the ASME Code Sectio Date 9-29-12 1 Owner Exelon Nuclear Name 1 Sheet 1 of 4300 Winfi eld Road, Warr enville, IL Address Byron Nuclear Power Station Unit 01

2. Plant Name Work Order No. 01386972-01 4450 N. German Church Road, Byron, IL Address Repair Organization, P.O. No., Job No., etc.

Type Code Symbol Stamp Not Applicable

3. Work Performed by Byron Mechanical Maintenance Authorization No. Not Applicable Name Expiration Date Not Applicable 4450 N. German Church Road, Byron, IL Address
4. Identification of System SD Steam Generator Blowdown Code Case
5. (a) Applicable Construction Code ASME Section III 19 74 Edition, W75 Addenda, No

/Replacement Activity: 2001 Edition/2003 Adde nda (b) Applicable Edition of Section XI Used for Repair (c)Section XI Code Case(s) N/A

6. Identification of Comp onents ASME Corrected, Code Removed, or Stamped National Other Year Installed (Yes or No)

Name of Manufacturer Board Name of No. Identification Built Compo nent Manufacturer Serial No.

MASONEILAN N-00189-3-5 1 SDO54E 1979 REMOVED NO N/A STUDS DRESSER B7T NOVA MACHINE HT# M41498 1 SDO54E 2012 INSTALLED NO N/A Cl# 1396461-1 STUDS PRODUCTS TRACE 7C97 MASONEILAN N-00189-3-5 1 SD054E 1979 REMOVED NO N/A NUTS DRESSER 2HT 1 SDO54E 1980 INSTALLED NO ANCHOR Ht# A6264 N/A NUTS DARLING CI# 8202-1 VALVE MASONEILAN 1SD054E 1979 Corrected YES N-00189-3-5 N/A SEATING DRESSER SURFACE

7. Description of Work REPAIRED VALVE, REPLACED BOLTING Hydrostatic q Pneumatic q Nominal Operating Pressure q Exempt
8. Test Conducted:

psi Test Temp. OF Other q Pressure gs may be used, provided (1) size is 8'/2 in. x 11 Note: Supplemental sheets in form of lists, sketches, or drawin included on each sheet, and (3) each sheet is numbered in., (2) information in items 1 through 6 on this report is and the number of sheets is recorded at the top of this form.

FORM NIS- 2 (Back)

9. Remarks WO:01386972-01

/Applicable manufacturers Data epo s to be a ac e CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code, Section Xi.

Type Code Symbol Stamp Not Applicable Certificate of Authorization No. Not Applicable Signed Jew 6..'4 Date P-6 ,20 12 er car Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Ha ord CT have 'Jinspected the components described in this Owner's Report during the period to r _ , and state that to the best of my knowledge and belief, he dwner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or propert,,dan1ac,yor a loss of any kind arising from or connected with this inspection.

Commissions Inspector's Signature National Board, State Province, and Endorsements Date: W,^^ 1' , 20 12 - --

DOCUMENT NO.: 6A REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI

1. Owner Exelon Nuclear Date 9-26-12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of 1 Address
2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01418845-01 Address Repair Organization, P.O. No., Job No., etc.
3. Work Performed by Byron Mechanical Type Code Symbol Stamp Not Applicable Maintenance Name Authorization No. Not Applicable 4450 N. German Church Road, Byron, IL Expiration Date Not Applicable Address
4. Identification of System CV CHEMICAL & VOLUME CONTROL
5. (a) Applicable Construction Code ASME Section III 19 71 Edition, W72 Addenda, N/A Code Case (b) Applicable Edition of Section XI Used for Repair/Replacement Activity: 2001 Edltion/2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of ame of anufacturer Board ther ear Installed (Yes or No)

Component Manufacturer Serial No. No. Identification Built SEAL WELD KEROTEST S/N: N01-16 9606 1CV8348 1976 REMOVED YES SEAL WELD KEROTEST S/N: N01-16 9606 1CV8348 1976 INSTALLED YES

7. Description of Work REMOVED/REINSTALLED SEAL WELD
8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure q Exempt Other q Pressure psi Test Temp. OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 8'/i in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks WO# 01418845-01 Appl icable manufacturer's a a Hepo rts to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorization No. Not Applicable Signed Date 1*2 -// , 20 12 er f Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of )iartford, CT have i sp cted the components described in this Owner's Report during the period to 11411&1.21 , and state that to the best of my knowledge and belief, the Owner has performed a aminations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection.

Commissions ,4'6' /l jZl,45 A/

Inspector's Signature and En National Board, State Province, and is Date: L!/B/N4d!' , 20 12

DOCUMENT NO.: 6A REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIRIREPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI

1. Owner Exelon Nuclear Date 9-26-12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of Address
2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01418846-01 Address Repair Organization, P.O. No., Job No., etc.
3. Work Performed by Byron Mechanical Type Code Symbol Stamp Not Applicable Maintenance Name Authorization No. Not Applicable 4450 N. German Church Road, Byron, IL Expiration Date Not Applicable Address
4. Identification of System CV CHEMICAL & VOLUME CONTROL
5. (a) Applicable Construction Code ASME Section 111 19 71 Edition, W72 Addenda, N/A Code Case (b) Applicable Edition of Section XI Used for Repair/Replacement Activity: 2001 Edition/2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of ame of anufacturer Board ther ear Installed (Yes or No)

Component Manufacturer Serial No. No. Identification Built SEAL WELD KEROTEST S/N N01 - 18 9608 1CV8368C 1976 REMOVED YES SEAL WELD KEROTEST S/N N01 - 18 9608 1CV8368C 1976 INSTALLED YES

7. Description of Work REMOVED/INSTALLED SEAL WELD
8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure q Exempt Other q Pressure psi Test Temp. OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 8'/2 in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks WO# 01418846-01 Applicable Manufacturer's Data Repo rts to e attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorization No. Not Applicable Signe d Date /2-// , 20 12 (Owner Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hartford, CT have inspected the components described in this Owner's Report during the period to , and state that to the best of my knowledge and belief, the Owner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection.

Commissions 4' ,.f/// /J 9 ,. i 61, Inspector's Signature National Board, State Province, and Endorsements Date: 17,'6lgr,1I /'/ , 20 12

DOCUMENT NO.: 3.0 REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIRS OR REPLACEMENTS As Required by the Provisions of the ASME Code Section XI

1. Owner Exelon Nuclear Date 9-19-12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of 1 Address
2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01419905-01 Address Repair Organization, P.O. No., Job No., etc.

Work Performed by Shaw/Stone & Webster Type Code Symbol Stamp Not Applicable Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Expiration Date Not Applicable Address

4. Identification of System CHEMICAL & VOLUME CONTROL (CV)
5. (a) Applicable Construction Code ASME Section III 19 74 Edition, S74 Addenda, 1644 Rev. 7, 1651, 1682, 1683, 1685, 1686, 1728, 1729, 1734, N-108, N-180 Code Case (b) Applicable Edition of Section XI Used for Repair/Replacement Activity 2001 Edition 1 2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of ame of anufacturer Board ther ear Installed (Yes or No)

Component Manufacturer Serial No. No. Identification Built Snubber, PSA - Pacific 14802 N/A 1 CV25001 S 1980 Removed Yes Snubber,Lisega 3110690-002 N/A 1 CV25001 S 2012 Installed No Lisega

7. Description of Work REPLACED WITH A LISEGA SNUBBER
8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure q Exempt q VT-3 Other Pressure psi Test Temp. OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 8'/x in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks WO 01419905-01 Applicabl e Manu f acture r's Data R eports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorization No. Not Applicable Signed a Date L. , 20 12 e'or Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of }Haord, rtf CT have in pe ted the components described in this Owner's Report during the period to and state that to the best of my knowledge and belief, he Owner has performed a aminations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property dama or a loss of any kind arising from or connected with this inspection.

Commissions X511, Ll^,s^!' / G Inspector's Signature National Board, State Province, and Endorsements Date: I , 20 12 (Final)

DOCUMENT NO.: 5.2 REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI

1. Owner Exelon Nuclear Date 9-23-12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of 1 Address
2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01430317-01 Address Repair Organization, P.O. No., Job No., etc.
3. Work Performed by Shaw/Stone & Webster Type Code Symbol Stamp Not Applicable Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Expiration Date Not Applicable Address
4. Identification of System Si (SAFETY INJECTION)
5. (a) Applicable Construction Code ASME Sect. III Pipe 19 74 Edition, S75 Addenda, N/A Code Case
5. (a) Applicable Construction Code ASME Sect. III Valve 20 04 Edition, N/A Addenda, N/A Code Case (b) Applicable Edition of Section XI Used for Repair/Replacement Activity 2001 Edition / 2003 Addenda (c) Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code

!National Removed, or Stamped Name of Manufacturer Board Other Year Installed (Yes or No)

Name of Component Manufacturer Serial No. No. Identification Built 1 SI08CA-4" Piping, Existing, Southwest Spool - SI-12-4 N/A 1 SI08CB-4 1978 Removed Yes 4" Fab. Co. S/N -14217 1 S108B-4" Valve, 4", 1500# 1S1101A 2012 Installed YES Conval Inc . SN# 80756W-1 A1 N/A Manual CID 1450220-1 Valve, 4", 1500# 1S1101B YES Conval Inc SN# 80756W-1.02 N/A 2012 Installed Manual 1450220-1 1 S108CA-4" Pipe, 4", Sch. 160 Consolidated HC# 41422 N/A 1 SIO8CB-4" 2012 Installed NO CID 27069-1 HC# NAPY 1 S108CA-4" Consolidated Org. UTC# 2912434 N/A 1S108CB-4" 2012 Installed NO Elbow, 4", 90 0 New UTC# 2921329 CID 1452462-1 HC# MOPF-1 , 1 S108CA-4" Consolidated Org. UTC# 2910425 N/A 1S108CB-4" 2012 Installed NO Elbow, 4", 90° New UTC# 2921328 CID 1452462-1 1.

HC# NAPY-1 , 1 S108B-4" Tee, 4", Sch. 160 Consolidated Org. UTC# 2911287 N/A 2012 Installed NO CID 1452464-1 New UTC# 2921327 Descr 7. iption of Work INSTALLED PIPING ,FITTINGS, AND VALVE( S) PER EC # 384106 Test Conduc

8. ted: Hydrostatic q Pneumatic q Nominal Operating Pressure Exempt q Other q Pressure 2103 psi Test Temp. 92 OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 81/2 in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks 01430317- 01 App l icabl e Manufacturer' s Data R eports to b e attach ea 90° Fittings originally CAT ID# 1452462-1, sent off for machining, returned as CAT ID# 1459561-1 Q Tee fitting originally CAT ID# 1452464- 1, sent off for machining, returned as CAT ID# 1459571-1 CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorization No. Not Applicable Signed CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hartford, CT have inspected the components described in this Owner's Report during the period 61-/,1_4__ __ to and state that to the best of my knowledge and belief, the Owner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property d merge or a loss of any kind arising from or connected with this inspection.

Commissions Inspector's Signature National Board, State Province, and Endorsements Date: &%YIZ __ /9 , 20 12

DOCUMENT NO.: 3.1 REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI

1. Owner Exelon Nuclear Date 09/23/12 Name 4300 Winfield Road, Warrenville, IL Sheet 1 of 1 Address
2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01435049-01 Repair Organization, P.O. No., Job No., etc.

Address

3. Work Performed by Shaw/Stone & Webster Type Code Symbol Stamp Not Applicable Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmin gton, IL 60481 Expiration Date Not Applicable Address
4. Identification of System MS (MAIN STEAM)
5. (a) Applicable Construction Code ASME Section III 19 74 Edition, na Addenda, na Code Case (b) Applicable Edition of Section XI Used for Repair/Replacement Activity 2001 Edition / 2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of anufacturer Board ther ear Installed (Yes or No) ame of Manufacturer Serial No. No. Identification Built Com ponent SAFETY VALVE, 6", DRESSER 1 MS013D Removed YES BRO9593 N/A 1977 1500# INDUSTRIES 1 MS013D SAFETY VALVE, 6", DRESSER BR09590 N/A 1977 Installed YES 1500# INDUSTRIES Cat ID 1443930-1
7. Description of Work REPLACE RELIEF VALVE Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure Exempt q 8.

Other q Pressure 1094 psi Test Temp. 558 OF in. x 11 in., (2)

Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 81/2 information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks 01435049-01 Appl icable Manufacturer' s Data epotts tome attaci-ed CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate Authorization No. Not Applicable Signed Date /; - 7 , 20 12 Owner or Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION 1, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hartford, CT have inspected the components described in this Owner's Report during the period j' -3 _/-A to 1,4 /A , and state that to the best of my knowledge and belief, the Owner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damagepr a loss of any kind arising from or connected with this inspection.

Commissions ,1,1 /j tL/ ^1^' Go Inspector`s Signature National Board, State Province, and Endorsements t

Date: /r L/G'l71,p a /r 1 3 , 20 12 (Final)

REV. NO.: 0 DOCUMENT NO.: 3.0 REPLACEMENTS FORM NIS-2 OWNER 'S REPORT FOR REPAIRS OR As Required by the Provisions of the ASME Code Section XI Exelon Nuclear Date 9-19-12

1. Owner Name 1 Sheet 1 of 4300 Winfie ld Road, Warre nville, IL Address Byron Nuclear Power Station Unit 01
2. Plant Name Work Order No. 01441222-01 4450 N. German Church Road, Byron, IL Repair Organization, P.O. No., Job No., etc.

Address Type Code Symbol Stamp Not Applicable

3. Work Performed by Shaw/Stone & Webster Name Authorization No. Not Applicable Expiration Date Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Address
4. Identification of System CHEMICAL & VOLUME CONTROL (CV)

ASME Section III 19 74 Edition, S74 Addenda, 1644 Rev. 7,

5. (a) Applicable Construction Code Code Case 1651, 1682,1683,1685,1686,1728,1729,1734, N-108, N-180 2001 Edition / 2003 Addenda t Activi ty (b) Applicable Edition of Section XI Used for Repair/Replacemen (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ther ear Installed (Yes or No) ame of anufacturer Board ame of No. Identification Built Component Manufacturer Serial No.

Snubber, PSA - Pacific N/A 1CV30002S 1980 Removed Yes 12447 1/4 Scientific 1CV30002S 2012 Installed No Snubber, Lisega Lisega 3110690/003 N/A

7. Description of Work REPLACED WITH A LISEGA SNUBBER Pneumatic q Nominal Operating Pressure q Exempt q
8. Test Conducted: Hydrostatic q psi Test Temp. OF VT-3 Other 0 Pressure gs may be used, provided (1) size is 81/2 in. x 11 in., (2)

Note: Supplemental sheets in form of lists, sketches, or drawin sheet, and (3) each sheet is numbered and the number information in items 1 through 6 on this report is included on each of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks WO 01441222-01 Applicable Manufacturers Data Reports to be attached CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorization N Not Applicable Signed Date 20 12 Owner)or Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION 1, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Hartford, CT have in a ted the components described in this Owner's Report during the period to and state that to the best of my knowledge and belief, ner has performed examinations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code,Section XI.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damage or a loss of any kind arising from or connected with this inspection.

Commissions National Board, State Province, and Endorsements D -ite: ,20 12 (Final)

DOCUMENT NO.: 4.2 REV. NO.: 0 FORM NIS-2 OWNER'S REPORT FOR REPAIR/REPLACEMENT ACTIVITY As Required by the Provisions of the ASME Code Section XI Owner

1. Exelon Nuclear Date 9-22-12 Name 4300 Winfield Road, Warrenville, IL Sheet _ of 1 Address
2. Plant Byron Nuclear Power Station Unit 01 Name 4450 N. German Church Road, Byron, IL Work Order No. 01468290-01/02 Address Repair Organization, P.O. No., Job No., etc.

Work Performed by Shaw/Stone & Webster Type Code Symbol Stamp Not Applicable Name Authorization No. Not Applicable 36400 S. Essex Road, Wilmington, IL 60481 Expiration Date Not Applicable Address

4. Identification of System RY / PRESSURIZER
5. (a) Applicable Construction Code ASME Section III 19 71 Edition, W72 Addenda, N/A Code Case (b) Applicable Edition of Section Xl Used for Repair/Replacement Activity 2001 Edition / 2003 Addenda (c)Section XI Code Case(s) NONE
6. Identification of Components ASME Corrected, Code National Removed, or Stamped ame of ame of anufacturer Board ther ear Installed (Yes or No)

Component Manufacturer Serial No. No. Identification Built RELIEF VALVE CROSBY VALVE YES N56964-00-0031 N/A 1 RY801 OA 1976 Removed 1 RY801 OA & GAGE RELIEF VALVE CROSBY VALVE 1 RY801OA N56964-00-0047 N/A 1976 Installed YES 1 RY8010A & GAGE CAT ID 1402762-1

7. Description of Work REMOVED / REPLACED PRESSURIZER RELIEF VALVE 1 RY8010A
8. Test Conducted: Hydrostatic q Pneumatic q Nominal Operating Pressure Exempt q Other q Pressure 2227 psi Test Temp. 649 OF Note: Supplemental sheets in form of lists, sketches, or drawings may be used, provided (1) size is 81/2 in. x 11 in., (2) information in items 1 through 6 on this report is included on each sheet, and (3) each sheet is numbered and the number of sheets is recorded at the top of this form.

FORM NIS-2 (Back)

9. Remarks 01468290-01/02 Applicable Manufacturer's Data Reports tob- eattac-Ke-A CERTIFICATE OF COMPLIANCE I certify that the statements made in the report are correct and this conforms to the requirements of the ASME Code,Section XI.

Type Code Symbol Stamp Not Applicable Certificate of Authorization No. Not Applicable I Signed r^ C Date /Z-/t ` , 20 12 Owner's Designee, Title CERTIFICATE OF INSERVICE INSPECTION I, the undersigned, holding a valid commission issued by the National Board of Boiler and Pressure Vessel Inspectors and the State or Province of Illinois and employed by HSB CT of Harjford, CT have i spected the components described in this Owner's Report during the period to and state that to the best of my knowledge and belief, ner has performed a aminations and taken corrective measures described in this Owner's Report in accordance with the requirements of the ASME Code, Section Xl.

By signing this certificate neither the Inspector nor his employer makes any warranty, expressed or implied, concerning the examinations and corrective measures described in this Owner's Report.

Furthermore, neither the Inspector nor his employer shall be liable in any manner for any personal injury or property damaggeor a loss of any kind arising from or connected with this inspection.

Commissions i/1/

Inspector's Signature National Board, State Province, and Endorsements Date: Dec'e& bl' /?^ , 20 12 (Final)

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