ML16341E916
| ML16341E916 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/14/1988 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML16341E915 | List: |
| References | |
| NUDOCS 8812230155 | |
| Download: ML16341E916 (24) | |
Text
ENCLOSURE 2
SAFETY EVALUATION BY TME OFFICE OF NUCLEAR REACTOR REGULATION OF THE FIRST TEN-YEAR INTERVAL INSERVICE INSPECTION PROGRAM PLAN PACIFIC GAS AND ELECTRIC COHPANY DIABLO CANYON POWER PLANT, UNIT 2 DOCKET NO.:
50-323 1.0 INTRODUC Technical Specification 4.0.5 for the Diablo Canyon Power Plant; Unit 2, states that the surveillance requirements for Inservice Inspection and Testing of the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Class 1, 2, and 3 components shall be applicable as follows:
Inservice Inspection of ASHE Code Class 1, 2, and 3 components shall be performed, in accordance with Section XI of the ASME Code and applicable Addenda as required by 10 CFR 50, Section 50.55a(g),
except where specific written relief has been granted by the Commission pursuant to 10 CFR 50, Section 50.55a(g)(6)(i).
Pursuant to 10 CFR 50.55a(g)(4),
ASHE Code Class 1, 2, and 3 components (including supports) shall meet the requirements, except the design and access provisions and the preservice examination requirements, set forth in the ASHE Code,Section XI, "Rules for Inservice Inspection of Nuclear Power Plant Components,"
to the extent practical within the 'limitations of design,
- geometry, and materials of construction of the components.
The regulations require that inservice examination of components and system pressure tests conducted during the first ten-year interval shall comply with the requirements in the latest edition and addenda of Section XI of the ASHE Code incorporated by reference in 10 CFR 50.55a(b) on the date twelve months prior to the date of issuance of the operating license, subject to the limitations and modifications listed therein.
The components (including supports) may meet the requirements set forth in subsequent editions and addenda of the ASHE Code incorporated by reference in 10 CFR 50.55a(b) subject to the limitations and modifications listed therein.
SSl2230155 SS1214 PDR ADOCK 05000M/
Pursuant to 10 CFR 50.55a(g)(5), if the licensee determines that conformance with an examination requirement of Section XI of the ASME Code is not practical for his facility, information shall be submitted to the Commission in support of that determination and a request made for relief from the ASME Code requirement.
After evaluation of the determination, pursuant to 10 CFR 50.55a(g)(6)(i),
the Commission may grant relief and may impose alternative requirements that are determined to be authorized by law, will not endanger life or property or the common defense and security, and are otherwise in the public interest, giving due consideration to the burden upon the licensee that could result if the requirements were imposed.
On January 26, 1987, Pacific Gas and Electric Company (the Licensee) submitted the First Ten-Year Interval Inservice Inspection (ISI) Program
- Plan, Revision 2, for the Diablo Canyon Power Plant, Unit 2, to meet the requirements of the 1977 Edition, Summer 1978 Addenda of Section XI of the ASME Boiler and Pressure Vessel
- Code, except that the extent of examination of Class 1 and 2 piping welds was determined by the 1974 Edition, Summer 1975 Addenda as required/permitted by 10 CFR 50.55a(b).
The staff, with technical assistance from its Contractor, Idaho National Engineering Laboratory (INEL), has evaluated the First Ten-Year Interval Inservice Inspection Program Plan, Revision 2, additional information related to the
- plan, and the requests for relief from certain ASME Code requirements determined to be impractical to perform at the Diablo Canyon Power Plant, Unit 2, during the first inspection interval.
2.0
~VA UNTO The ISI Program Plan has been evaluated for (a) application of the correct Section XI Code edition and addenda, (b) compliance with examination and test requirements of Section XI, (c) acceptability of the examination
- sample, (d) compliance with commitments made by the Licensee prior to plant operation, (e) correctness of the application of system or component examination exclusion criteria, and (f) adequate information in support of requests for relief from impractical Section XI Code requirements.
The staff has determined that the Licensee's ISI Program Plan reflects compliance with the requirements listed above.
The information provided by
the Licensee in support of requests for relief from impractical requirements has been evaluated and the bases for granting relief from those requirements are documented in the INEL Technical Evaluation Report (TER) attached.
We concur with the findings and recommendations contained in the TER.
Table 1
presents a summary of the reliefs requested and the status of the requests as determined by the staff.
3.0
~CONC US N
The staff concludes that the Diablo Canyon Power Plant, Unit 2, First Ten-Year Interval Inservice Inspection Program Plan, Revision 2, with the additional information provided and the specific written relief constitute the basis for compliance with 10 CFR 50.55a(g) and Technical Specification 4.0.5 and is therefore acceptable.
TABLE 1 (Unit 2)
U A
0 U
TS Page 1 of 9 Rel ief Request
'Nmbe NDE-001 B1.11 B-A Reactor Pnessure Vessel Item Exam.
System or
~o.
~Ca Ijgggi~
Volume or Area e
Circumferential Shell Meld 10-201 Required
~et od Volumetric Licensee Proposed entie Volumetric (UT) examination to extent practical Rel ief Request Status Granted NDE-002 B1.21 B-A Reactor Pressur e Vessel Circumferential Head Melds:
4-202 6-205B Volumetric Hone Granted NDE-002 NDE-003 NDE-004 B1.22 B-A B1.40 B-A B3.90 B-D Reactor Pressure Vessel Reactor Pressure Vessel Reactor Pressure Vessel Heridional Head Melds:
1-202A through F
1-205A through F
Head-To-Flange Meld 6-205A Nozzle-To-Vessel Melds:
29-inch Outlet Hozzles (Total 4) 27.5-inch Inlet Nozzles (Total 4)
Volumetric Volumetric Volumetric a
Volumetric (UT)
Granted examination to extent practical Volumetric (UT)
Granted examination to extent practical Volumetric (UT)
Granted examination to extent practical NDE-005 B3.110
. B-D Pressurizer Nozzle-To-Vessel Melds:
Safety Nozzle, Spray Nozzle, Relief Hozzles (3),
and Surge Nozzle Volumetric Volumetric (UT)
Granted examinations to extent practical NDE-005 B3.120 8-D Pres suri zer Nozzle Inside Radiused Sections:
Safety Nozzle, Spray Nozzle, Surge Nozzle, and Relief Nozzles (3)
Volumetric Hone Granted
TABLE 1 (Unit 2)
R OFRL USS Page 2 of 9 Relief Request
~tl~be Item Exam.
System or M~ Emanent, Volume or Area Required od Licensee Proposed e
Rel ief Request NDE-009A 85.20/
8-F 85.50 Pressurizer Nozzle-To-Safe End Melds:
MIB-359SE MI8-369SE MI8-380SE Volumetric and Surface 10K Surface examination and Volumetric (UT) examination to extent practical Granted NDE-0098 85.30/
8-F Steam 85.50 Generator Nozzle-To-Safe MIB-RC-1-5SE WIB-RC-2-5SE WIB-RC-3-5SE MIB-RC-4-5SE End Melds:
MI8-RC-1-6SE WIB-RC-2-6SE MIB-RC-3-6SE WIB-RC-4-6SE Volumetric and Surface 100K Surface examination and Volumetric (UT) examination to extent practical Granted NDE-009C 89.11 8-J Piping Melds:
'MIB-RC-l-ll WIB-RC-2-11 MIB-RC-3-11 MI8-RC-4-11 MIB-RC-1-12 MIB-RC-2-12 MI8-RC-2-15 WIB-RC-3-12 MIB-RC-4-12 WIB-56 WIB-62 WIB-71 WIB-92 MIB-97 WIB-243 MI8-253 WIB-11 MIB-106 Melds:,
MIB-265 MIB-164 MIB-172 MIB-196 MIB-299 MI8-362 WIB-429 WIB-430 MIB-374 WIB-378 WIB-391 WIB-15 WIB-119 WIB-47 MIB-177 WI8-181 WIB-203 MI8-300 Volumetric and Surface Surface and Granted Volumetric (UT) examinations to extent practical
UMNRY 0 TABLE 1 (Unit 2)
U TS Page 3 of 9 Rel ief Request Item Exam.
System or
~ombe
~o.
~Ct NDE-009C B9.12 B-J Piping NOE-009C B9.31 B-J Piping Volume or Area e
e Melds:
MIB-RC-2-8LS-A MIB-RC-2-8LS-B Melds:
MIB-104 MIB-1
'MIB-192 Required
~et o
Volumetric and Surface Volumetric and Surface Licensee Proposedt ION Surface examination and Volumetric (UT) examination to extent practical 10% Surface examination and Volumetric (UT) examination to extent practical Relief Request
~~s Granted Granted NOE-015 B3.140 B-0 Steam Nozzle Inside Radiused Generator Sections:
Primary Inlet and Outlet Nozzles Volumetric None Granted provided visual examination of areas is performed during tube examinations NDE-007A C1.10 C-A Seal Injection Filter 2-1 Girth Meld 1
Volumetric None Granted provided visual examination of area is performed to extent practical
TABLE 1 (Unit 2)
U R
0 EL UESTS Page 4 of 9 Rel ief Request
~dombe NDE-007A Item Exam.
System or
~o
~Ca
~o~ggf C1.10 C-A Excess Letdown Heat Exchanger Volume or Area Girth Meld 13 Required
~eod Volumetric Licensee Proposed ve Surface examination to extent practical Rel ief Request
~ta~
Granted provided volumetric examination performed to extent practical NDE-007A Cl.10 C-A RHR Heat Exchanger 2-1 Girth 'Meld 21 Volumetric Surface examination to extent practical Granted provided volumetric examination performed to extent practical NDE-007A C1.20 C-A Stabilizer Girth Melds G-A and G-8 Separator Volumetric Volumetric (UT) examination to extent practical Granted NDE-007A C1.20 C-A Seal Injection Filter 2-1 Girth Meld 2 Volumetric Hone Granted provided visual examination of area is performed to extent practical NDE-007A C1.20 C-A Excess Letdown Heat Exchanger Girth Weld 14 Volumetric Surface examination to extent practical Granted provided volumetric examination performed to extent practical
TABLE 1 (Unit 2)
U A
0 R
Page 5 of 9 Rel ief Request
~Ni~b NDE-007A Item Exam.
System or
~CC QL'mmmi C1.20 C-A RHR Heat Exchanger 2-1 Volume or Area Girth Weld 22 Required MRQ$~
Volumetric Licensee Proposed ve Surface examination to extent practical Relief Request Granted provided volumetric examination performed to extent practical NDE-007A C2.20 C-B RHR Heat Nozzle-To-Shell Welds:
Exchanger 23 and 24 2-1 Volumetric and Surface Sur face examination to extent practical Granted provided volumetric examination performed to extent practical NDE-008 NDE-007B C1.20 C-A Boron Circumferential Head Welds:
Injection A and B
Tank C1.20 C-A Regenerative Circumferential Head Welds:
Heat 9 and 12 Exchanger Volumetric Volumetric Volumetric (UT) examination to extent'practical 100'urface (PT) examination Granted Granted NDE-007B C1.30 C-A Regenerative Tubesheet-To-Shell Welds:
Heat 10 and ll Exchanger Volumetric
'j[4eposlte
'surface (PT) examination of accessible areas of Welds 2, 3, 6, 7, 10, and 11 Granted
TABLE 1 (Unit 2)
Page 6 of 9 0
E U
S Relief Request
~umbe Item Exam.
System or MQ
~~a QIIMEQi Volume or Area Required
'et d
Licensee Proposed Rel ief Request
~SLY NDE-013 C1.20/
C-A Regenerative Circumferential Head and C1.30 Heat Tubesheet-To-Shell Welds Exchanger Withdrawn by Licensee-Incorporated into Relief Request NDE-007 NDE-009D C5.11 C-F Piping Circumferential Weld WIC-36 Surface Surface (PT) examination to extent practical Granted NDE-009D C5.21 C-F Piping NDE-010 C4.30 C-D Safety Injection Pumps Circumferential Welds:
WIC-90 WICG-103-1
'WIC-332 WIC-325 WIC-105 Bolting Volumetric and Surface Volumetric
== examination distributed over interval in accordance with Table IWC-2412-1 Surface and Volumetric (UT) examinations to extent practical 100t Volumetric examinatio~
scheduled in accordance with plant maintenance schedule (once during interval)
Granted Granted NDE-011 C6.10 C-G Centrifugal Suction End Plate Weld Charging Pump Surface examination distributed over interval in accordance with Table IMC-2412-1 100K Surface examination scheduled in accordance with plant maintenance schedule (once during interval)
Granted
U R
0 TABLE 1 (Unit 2)
Page 7 of 9 Relief Request
~~b 1A 2A Item Exam.
System or M~ Mi,Qmuunmi Volume or Area Hydrostatic Test of Class 2 Component Cooling Water Systems Hydrostatic Test of Class 2 Centrifugal Type Pumps and Associated Piping Required M&eXSI IWC-5000 IWC-5000 Licensee Proposedt e
Relief
. Request
<<5 Hydrostatic Granted pressure boundary in accordance with I'WA-5224(d) of 1980 Edition, 1981 Addenda at normal operating conditions Visual leak check Denied:
during normal Insufficient system operation justification each period and a
weekly analysis of water chemistry Hydrostatic Test of Class 2 Component Cooling Water Piping Associated with Containment Penetrations Hydrostatic Test of Class 2 Safety Injection, Residual Heat Removal, Reactor Coolant Pump Seal Injection, Charging and Boron Injection Piping Hydrostatic Test of Class 2 Reactor Coolant Pump Seal Return Piping Hydrostatic Test of Class 2
RHR Pump Suction Piping from Containment Sumps IWC-5000 IWC-.5222 IWC-5000 IWC-5000 IWD-5000 Portions not isolatable from Class 1 tested to Class 1
requirements None None Denied:
Insufficient justification Granted Granted Granted
U Y 0 TABLE 1 (Unit 2)
Page 8 of 9 Rel ief Request
~n~b Item Exam. "'ystem or MM Dms Volume or Area Required
~eed Licensee Relief Proposed Request Mem 1B Hydrostatic Test of Class 3 Centrifugal Type Pumps and Associated Piping IMD-5000 Hydrostatic pressure boundary in accordance with IMA-5224(d) of 1980 Edition, 1981 Addenda at normal operating conditions Granted 2B Hydrostatic Test of Class 3 Component Cooling Mater Systems IWD-5000 Visual leak check Denied:
during normal Insufficient system operation justification each period and a
weekly analysis of water chemistry Hydrostatic Test of Embedded Class 3
Auxiliary Saltwater Piping IMD-5000 Periodic pump testing to verify unimpaired flow through inaccessible portions and visual leak test of exposed portions during system pressure tests Granted NDE-006 NDE-014 Exemption Criteria for Pressure Retaining Melds in Class 2 Piping Exemption of Class 2 Components IMC-1220 of IMC-1220 of 1977 Granted 1974 Edition,
- Edition, Summer Summer 1975 1978 Addenda Addenda Mithdrawn gaby Licensee
TABLE 1 (Unit 2)
Page 9 of 9 0
R U
S Rel ief Request
~umph Item Exam.
System or
~o
~C~ Q!KKSBf, Volume or Area Required
~bad Licensee Proposed at e
Relief Request REP-001 NDE-012 Repair and Replacement of Class 3 Diesel Engine Blocks Scheduling of Class 2 Pipe 'fields in Hultiple Stream Systems IKC-2411 (Examinations divided among the multiple streams of a system)
Sample selected in one stream of "multiple stream" systems (10K of the Code-required total of welds will be examined)
Qithdrawn by Licensee Granted