ML16341E914
| ML16341E914 | |
| Person / Time | |
|---|---|
| Site: | Diablo Canyon  |
| Issue date: | 12/14/1988 |
| From: | Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML16341E915 | List: |
| References | |
| NUDOCS 8812230139 | |
| Download: ML16341E914 (22) | |
Text
ENCLOSURE 1
SAFETY EVALUATION BY THE OFFICE OF NUCLEAR REACTOR REGULATION OF THE FIRST TEN-YEAR INTERVAL INSERVICE INSPECTION PROGRAM PLAN PACIFIC GAS AND ELECTRIC COMPANY DIABLO CANYON POWER PLANT) UNIT 1
DOCKET NO.:
50-275 1.0 U
ON Technical Specification 4.0.5 for the Diablo Canyon Power Plant;; Unit 1, 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 ASME 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),
ASME 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 ASME 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 ASME 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 ASME Code incorporated by reference in 10 CFR 50.55a(b) subject to the limitations and modifications listed therein.
SS1 2 ppK pSppp:2'g 23p139 881214 PDR AD p5c
lI 0
Pursuant to 10 CFR 50.55a(g)(5),.if the licensee determines that conformance with an examination requirement of Section XI of the ASHE 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 ASHE 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 secur ity, 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 5, for the Diablo Canyon Power Plant, Unit.1, to meet the requirements of the 1977 Edition, Suamer 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 5, additional information related to the
- plan, and the requests for relief from certain ASHE Code requirements determined to be impractical to perform at the Diablo Canyon Power Plant, Unit 1, during the first inspection interval.
2.0 Qg UAT~N 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 I presents a summary of the reliefs requested and the status of the requests as determined by the staff.
- 3. 0 g)~NC U~SN The staff concludes that the Diablo Canyon Power Plant, Unit I, First Ten-Year Interval Inservice Inspection Program Plan, Revision 5, 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 1)
U MARY OF RE EF E
U STS Page 1 of 8 Relief Request
~maybe Item Exam.
System or
~o.
Cat Qg~oggf Volume or Area e
a ed Required
~et od Licensee Relief Proposed Request Me!5 NDE-001 B1.11 B-A Reactor Pressure Vessel Circumferential Shell Meld 10-442 Volumetric Volumetric (UT)
Granted examination to extent practical NDE-002 NDE-002 NDE-003 NDE-004 B1.21 B-A B1.22 B-A B1.40 B-A B3.90 B-D Reactor Pressure Vessel Reactor Pressure Vessel Reactor Pressure Vessel Reactor Pressure Vessel Circumferential Head Melds':
4-443 6-446B Heridional Head Melds:
1-443A through F
1-446A through F
Head-To-Flange Meld 6-446A Nozzle-To-Vessel Melds:
29-inch Outlet Nozzles (Total 4) 27.5-inch Inl'et Nozzles (Total 4)
Volumetric Volumetric Volumetri c Volumetric None Volumetric (UT) examination to extent practical Volumetric (UT) examination to extent practical Volumetric (UT) examination to extent practical Granted Granted Granted Granted NDE-008A 85.20/
B-F Pressurizer Nozzle-To-Safe End Melds:
B5.50 MIB-71SE MI8-322SE Volumetric Surface and Granted and Surface Volumetric (UT) ixaminations to extent practical NDE-012A B3.120 8-D Pressurizer Nozzle Inside Radiused Sections:
Safety Nozzle, Spray Nozzle, Surge Nozzle, and Relief Nozzles (3)
Volumetric None Granted
TABLE 1 (Unit 1)
U R
0 R
IEFREUSS Page 2 of 8 Rel ief Request
~qmbe~
Item Exam.
System or
~o.
Cat Qgi~tdtt Volume or Area ed Required
~et od Licensee Proposed e
at ve Rel ief Request
~St t NDE-008B B5.30/
B-F B5.50 Steam Generator Nozzle-To-Safe End Welds:
MIB-RC-2-6SE MIB-RC-3-5SE MIB-RC-4-5SE WIB-RC-1-6SE MIB-RC-2-7SE MIB-Rc-3-6SE WIB-Rc-4-6SE Volumetric and Surface 10'urface examination and Volumetric (UT) examination to extent practical Granted NDE-008C B9.11 B-J Piping Melds:
WIB-Rc-2-5 WIB-Rc-1-12 WIB-RC-2-10 WIB-Rc-2-14 MIB-Rc-2-9 WIB-Rc-3-12 MIB-RC-4-12 MIB-RC-1-13 MI8-RC-2-15
.MIB-Rc-3-13 MIB-Rc-4-13 MIB-401 MIB-408 MI8-417 WIB-64 MIB-422 WIB-433 MIB-442 WIB-444 Welds:
MIB-383 MIB-400 MIB-67 MIB-68 MI8-1 MIB-5 MIB-82 MIB-175 MI8-289 MIB-151 MIB-210 MIB-267 MIB-334 MIB-319 MIB-321 MIB-248 WIB-16 MIB-83 WIB-361.
Volumetric Surface and and Surface Volumetric (UT) examinations to extent practical Granted NDE-008C B9.31 8-J Piping Welds:
WIB-RC-2-18BC WIB-Rc-2-12 WIB-Rc-2-16 WIB-RC-2-11 Volumetric and Surface 100'urface examination and Volumetric (UT) examination to extent practical Granted
TABLE 1 (Unit I)
U ARY OF E
E U STS Page 3 of 8 Relief Request
~Nombe Item Exam.
System or
~o.
~Ca
~eggy~
Volume or Area Required
~et od Licensee Proposed ative Rel ief Request
~tat NDE-012B B3.140 B-D 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-006A C1.10 C-A Seal Injection Filter 1-1 Girth Meld G-A Volumetric None Granted provided visual examination of area is performed to extent practical NDE-006A C1.10 C-A Excess Letdown Heat Exchanger NDE-006A C1.10 C-A RHR Heat Exchangers 1-1 and 1-2 Girth Meld G-A Girth Weld G-A Volumetric Volumetric Surface examination to extent practical Surface examination to extent practical Granted provided volumetric examination performed to extent practical Granted provided volumetric examination performed to extent practical
TABLE 1 (Unit 1)
U MAR 0
RE E
U S
S Page 4 of 8 Rel ief Request
~Nembe Item Exam.
System or Cmmmmf; Volume or Area Required Licensee Proposed at ve Relief Request
~Sat NDE-006A C1.20 C-A Stabilizer Girth Melds A and B
Separator Volumetric Volumetric (UT) examination to extent practical Granted NDE-006A C1.20 C-A Seal Injection Filter 1-1 Girth Weld G-B Volumetric None Granted provided visual examination of area is performed to extent practical NDE-006A C1.20 C-A Excess Letdown Heat Exchanger NDE-006A C1.20 C-A RHR Heat
.Exchangers 1-1 and 1-2 Girth Meld G-B Girth Weld G-D*
~ This weld is incorrectly listed as G-B in the TER.
Volumetric Volumetric Surface examination to extent practical Surface examination to extent practical Granted provided volumetric examination performed to extent practical Granted provided volumetric examination performed to extent practical NDE-006A C2.20 C-B RHR Heat Nozzle-To-Shell Welds:
Exchangers N-1 and N-2 1-1 and 1-2 Volumetric and Surface Surface examination to extent practical Granted provided volumetric examination performed to extent practical
TABLE 1 (Unit 1)
U RYO R
E EU S
Page 5 of 8 Rel ief Request
~Nuebe Item Exam.
System or
~o
~Ct QIHIIIIID~
Volume or Area e
a Required
~et od Licensee Proposedt ve Relief Request
~t~ts NDE-007 C1.10
, C-A Steam Generator Circumferential Shell Welds:
1-3, 2-4, and 3-5 Volumetric Volumetric (UT) examination to extent practical Granted NDE-007 C1.20 C-A Steam Circumferential Head Meld Generator 4-7 Volumetric Volumetric (UT) examination to extent practical Granted NDE-007 C1.20 C-A Boron Injection Tank Circumferential Head Welds:
A and B
Volumetric Volumetric (UT) examination to extent practical Granted NDE-006B C1.20 C-A Regenerative Circumferential Head Welds:
Heat 9 and 12 Exchanger Volumetric IONIC Surface (PT)
Granted examination NOE-006B C1.30 '-A Regenerative Heat Exchanger Tubesheet-To-Shell Melds:
10 and 11 Volumetric Composite Surface (PT) examination of accessible areas of Welds 2, 3, 6, 7, 10, and 11 Granted NDE-011 Cl.20/
C-A Regenerative Circumferential Head and C1.30 Heat Tubesheet-To-Shell Welds Exchanger
~ Withdrawn by Licensee-Incorporated into Relief Request NDE-006 NOE-008D C3.40 C-C Piping Integrally Welded Attachment Surface 74-29A Surface (PT) examination to extent practical Granted
TABLE 1 (Unit 1)
UMHARY OF REL E
R U STS Page 6 of 8 Rel ief Request
~Numb e Item Exam.
System or
~o.
Cat QEddjt~
Volume or Area d
Required
~Ne od Licensee Relief Proposed Request
~tJJ NOE-008D C5.11 C-F Piping Circumferential Weld WIC-27 Surface Surface (PT)
Granted examination to extent practical NDE-008D C5. 21 C-F Piping NOE-009 C4.30 C-D Safety Injection Pumps Circumferential Welds:
WIC-184 WIC-249 WIC-289 WIC-348 WIC-353 WIC-101A1-4 WIC-1357E Bolting Volumetric and Surface Volumetric examination distributed over interval in accordance with Table IWC-2412-1 100K Surface examination and Volumetric to extent practical 10% Volumetric examination scheduled in accordance with plant maintenance schedule (once during interval)
Granted Granted 1A Hydrostatic Test of Class 2 Centrifugal Type Pumps and Associated Piping NDE-010 C6.10 C-G Centrifugal Suction End Plate Weld Charging Pump Surface ION Surface
'examination examination distributed scheduled in over interval accordance with in accordance plant maintenance with Table schedule (once IWC-2412-1
'.i, dUring interval)
"te t'j:.
IWC-5000 Hydrostatic pressure boundary in accordance with IWA-5224(d) of 1980 Edition, 1981 Addenda at normal operating conditions Granted Granted
TABLE 1 (Unit 1)
Page 7 of 8 U
YO E
S Relief Request
~umbe 2A Item Exam.
System or
~o.
~C~ QIIHL!~
Volume or Area Hydrostatic Test of Class 2 Component Cooling Mater Systems Required
~et o
IMC-5000 Licensee Relief Proposed Request ti
~S 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 Mater 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 IMC-5000 IMC-5222 IWD-5000 Portions not isolatable from Class 1 tested to Class 1
requirements Denied:
Insufficient just)fication Granted Hydrostatic Test of Class 2 Reactor Coolant Pump Seal Return Piping Hydrostatic Test of Class 2
RHR Pump Suction Piping from Containment Sumps IMC-5000 None IWC-5000 None Granted Gr anted 1B Hydrostatic Test of Class 3 Centrifugal Type Pumps and Associated Piping IMD-5000 Hydrostatic
- -. pressure boundary
" 'in accordance with IWA-5224(d) of 1980 Edition, 1981 Addenda at normal operating conditions Granted
TABLE 1 (Unit I) 0 Page 8 of 8 Relief Request
~Nembe Item Exam.
System or
~e.
CR~
Q!IE9ILe~
Volume or Area Required
~et d
Licensee Proposed ve Rel ief Request 2B Hydrostatic Test of Class 3 Component Cooling Mater'Systems IMD-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 IWD-5000 Periodic pump testing to verify unimpaired flow through inaccessible portions and visual leak test of exposed portions during system pressure tests Granted NDE-005 REP-001 Exemption Criteria for Pressure Retaining Welds in Class 2 Piping Repair and Replacement of Class 3 Diesel Engine Blocks IMC-1220 of
IWC-1220 of 1977 Granted 1974 Edition,
- Edition, Summer Summer 1975 1978 Addenda Addenda Mithdrawn by Licensee