ML20153B616
| ML20153B616 | |
| Person / Time | |
|---|---|
| Site: | Vogtle  |
| Issue date: | 08/25/1988 |
| From: | Bailey J GEORGIA POWER CO., SOUTHERN COMPANY SERVICES, INC. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| Shared Package | |
| ML20153B621 | List: |
| References | |
| GN-1482, NUDOCS 8808310027 | |
| Download: ML20153B616 (8) | |
Text
i Georgia Power Company Post Office Box 282 Waynesbora Georgia 30830 Telephone 404 554 9961 404 724-8114 Southem Company Services, Inc.
Post Office Box 2625 Birmingham, Alabama 35e02 reiepnene 2058 m on Vogtle Project August 25, 1988 United States Nuclear 4egulatory Commission ATTN:
Document Control Desk File:
X7BC35 Washington, D.
C.
20505 Log:
GN-1482 NRC DOCKET NUMBER 50-425 CONSTRUCTION PERMIT NUMBER CPPR-109 VOGTLE ELECTRIC GENERATING PLANT - UNIT 2 PRESERVICE II;SPECTION PROGRAM REV. 3 Gentlemen:
Enclosed for your review are ten copies of the VEGP-2 PSI
- Progran, ISI-P-010, Revision 3.
This revision incorporates requests for relief numbers 1 through 45, a
reformatted line list which includes non-safety related lines with snubbers requiring
- testing, and miscellaneous editorial changes.
A summary of differences between VEGP-1 and VEGP-2 PSI relief requests can also be found in Attachment A of this letter.
In a related matter, Attachment B answers questions posed by your letter dated August 11, 1988 pertaining to the PSI Program, Revision 2.
To supplement some of our
- answers, pertinent sections of the PSI Plan, ISI-P-009 Revision 2, are attached in three two-volume sets.
If your staff should require additional information, please do not hesitate to contact me.
Sincerely,
.h-bo J.
A.
Bailey f2 Project Licensing Manager 8gg JAB /sem l
Enclosure Nd xc:
NRC Regional Administrator J.
B.
Hopkins (2) gg NRC Resident Inspecter G.
Bockhold, Jr.
$q P.
D.
Rice J.
E.
Joiner, Esquire j
gg J.
P.
Kane R.
J.
Goddard, Esquire mac R.
A.
Thomas R.
W.
McManus 4
B.
W.
Churchill, Esquire Vogtle Project File p
jbOO3 4
ATTACHMENT A The following differences exist between the VEGP-1 and VEGP-2 Preservice Inspection Relief Requests.
General Differences 1)
The Unit 2 Proservice Program and Plan were developed to the requirements of Section XI 1983 Edition with Summer 1983 Addenda with the exception of the RPV mechanized examinations which were in accordance with Section XI 1980 Edition with Winter 1981 Addenda.
The Unit 1 Preservice Program and Plan were developed to the requirements of Section XI 1980 Edition with Winter 1980 Addenda with the exception of the RPV mechanized examinations which were in accordance with Section XI 1980 Edition with Winter 1981 Addenda.
The relief requests have been written accordingly.
2)
In some cases the amount of weldo requiring relief vary due to selection criteria, configuration, etc.
3)
In some cases examination coverage (4) will be different due to component orientation and/or limitation.
4)
Editorial type differences are throughout and will not be addressed.
Somelfie Differences RR-19 VEGP-2 has overlaid pressurizer safety relief valve piping where VEGP-1 does not.
RR-21 VEGP-2 borrowed the South Texas Project calibration block for examining the two four-inch "set on" branch connection to pipe welds.
This technique was demon-l strated to be acceptable per IWA-2240.
RR-23 VIGP-2 used actual wall thickness whereas VEGP-1 used nominal wall thickness.
RR-32 Upon further evaluation, VEGP-2 has determined
- 1) the configuration described in the Code (INC-2500-4(c)) is not the same as the VEGP-2 RHR hent exchanger design and
- 2) the only appropriate Code Iten Nos, are C2.31 and C2.33, the latter of which is exempt from preservice requirements per IWA-5215.
A-1
ATTACHMEHI_A Soecific Differences (Cont'd)
RR-33 The stude for both safety injection pumps were examined at VEGP-2 as required by RR-33 for Unit 1.
Consequently, no VEGP-2 relief is required.
RR-34 VEGP-2 used a Code acceptable calibration block to RR-35 perform the SER required examinations for these three RR-36 relief requests.
The VEGP-2 examinations satisfied the requirements of Vogtle SER paragraph 6.6.3.
RR-38 VEGP-2 wishes to reaffirm that INE is not part of the PSI program and plan.
This relief request is similar to the VEGP-1 121 relief request.
RR-45 VEGP-2 prepared a generic relief request whereas VEGP-1 prepared a relief request which applied to 24 specific welds.
l A-2
ATTACHMENT B PLANT VOGTLE - UNIT 2 NRC DOCXET 50-425 ADDITIONAL INFORMATION ON THE PRESERVICE INSPECTION PROGRAM below please find GPC's response to the NRC request for additional information pertaining to the Vogtle - Unit 2 Preservice Inspection Program, Revision 2.
Transcription of each of the NRC questions precedes GPC's response.
A.
NRC Ouestion The "Line Designation List" (Section 7.0) lists the lines within the scope of the ASME Code Section XI.
The Tables identify the lines'by s, stem, line number, size, Code class, temperature, pressure, examination method (s) required, and basis for exemption (if applicable).
Will all of the welds on the lines identified for examination, both Class i and Class 2, receive PSI examinations?
If not, provide the staff with an itemized listing of the components, by system, which will be subjected to examination during PSI.
The requested listing is necessary to permit the staff to determine if the extent of PSI examinations performed during PSI will meet the applicable regulations and Code requirements.
GPC Resoonse Not all of the welds recieved a PSI examination.
Class 1 and Class 2 welds were examined in accordance with the requirements of the ASME Code Section XI for preservice inspection.
Additional NRC required examinations that exceeded ASME Code Section XI requirements were also performed.
The itemized listing of components, by system, which required preservice examination is contained in Sections 5.0 and 6.0 of the Preservice Inspection Plan.
A copy of these sections is enclosed.
B-1
B.
NRC Ouestion Provide isometric and/or component drawings showing the welds, components, and supports which are required to be examined by Section XI of the ASME Code.
GPC Resoonse class 1, 2,
and 3 component drawings are included in Section 11 of the PSI Plan while Class 1 and 2 1sometric drawings are included in Section 12 of the PSI Plan.
A copy of these sections is enclosed.
Class 3 piping isometrics are shown on design drawings, which are available for review at the site.
l C.
NRC Ouestion In May and June of 1985, Georgia Power Company successfully demonstrated the ultrasonic procedures and equipment used for examination of the centrifuga11y cast stainless steel (CCSS) in the main coolant loop piping at Vogtle Unit 1.
For further information see NRC Region report numbers 50-424/85-18 and 50-424/85-25.
Provide a discussion of the PSI ultrasonic examination of the main coolant loop piping at Vogtle Unit 2.
Confirm that the materials in the main coolant loops at Vogtle Unit 2 possess essentially the same acoustical properties as those at Unit 1, that the equipment and procedures being used for PSI examinations at Unit 2 meet the methodology require-ments of Section XI of the ASME Code, and that the detection of significant defects, if present, is possible.
GPC Resoonse The materials in the main coolant loops at Vogtle Unit I
2 exhibit the same acoustical properties as those at Unit 1.
The equipment and procedures used for PSI examinations at Unit 2 are the same as for Unit 1 and a
meet the methodology requirements of Section XI of the ASME Code.
GPC's procedure, and ultrasonic equipment hava demonstrated detection capability for the preservice examination at the Vogtle facility.
Reference NRC Region II report numbers 50-424/85-18 and 50-425/85-18.
i B-2
I D.
NRC Ouestion Calibration standards meeting the Code requirements were not obtained and used during the PSI examinations of the Pressurizer nozzle-to-safe end welds at Vogtle Unit 1.
Section XI, Article III, Paragraph III-3410 requires that basic calibration blocks shall be made from material of the same nominal diameter and nominal wall thickness or pipe schedule as the pipe to be examined.
Verify that appropriate calibration blocks will be obtained and utilized during PSI examinations at Vogtle Unit 2.
I GPC Resoonse The PSI examinations of the Pressurizer nozzle-to-safe end welds at Vogtle Unit 2 were performed using the t
same calibration blocks that were used during the Vogtle Unit 1 PSI.
In addition, the Construction Code examination records will be documented and identified in the Vogtle Unit 2 Final Report as allowed by Section XI, Paragraph INB-2200 (b). The Code required Calibration blocks will be fabricated and used for ISI examinations.
4 E.
NRC Ouestion Calibration standards meeting the Code requirements of Section XI, Article III, were also not obtained and used during the augmented volumetric examination of j
thin-walled (less than 0.5 inch wall thickness) and t
small diameter Class 2 piping welds in the Enginee: ad Safety Systems during PSI examinations at Vogtle Unit 1.
Verify that the appropriate calibration blocks will 1
be obtained and utilized for examination of these welds during PSI at Vogtle Unit 2.
GPC Rannonse Calibration standards meeting the Code requirements of Section XI, Article III, were obtained and used during the augmented volumetric examination of thin-walled (less than 0.5 inch wall thickness) and small diameter Class 2 piping welds in the Engineered Safety Systems t
j during PSI examinations at Vogtle Unit 2.
i 4
i l
l 1
\\
B-3 i
F.
NRC Ouestion Provide a list of the ultrasonic calibration standards being used during the PSI examinations at Vogtle Unit 2.
This list should include the calibration standard identifications, material specifications, and sizes.
GPC Resoonse The list of calibration blocks / standards used during the PSI examinations at Vogtle Unit 2 is in Section 4.0 of the Preservice Inspection Plan.
A copy of this section is enclosed.
G.
NRC Ouestion The examination category tables for Class 2 systems in Section 3 of the PSI Program, with regard to the volumetric examination of longitudinal piping welds (Code Item Nos. C5.12 and C5.22), reference Note 8.
Note 8 states: "Some of the longitudinal welds may be made with the addition of filler metal and others may be made without the addition of filler metal.
A Code examination will be accomplished to the extent practical."
Provide clarification with regard to why presence or absence of filler metal, for the longi-tudinal seam welded piping., will affect the Code required volumetric and/or surface examinations.
GPC Rosconse Note 8 was incorporated in the Preservice Program, Revision 2, to clarify GPC's intent to examine both types of longitudinal welds.
When Revision 2 of the PSI Program was being developed, less than 50% of the scope of work was completed with exanination limitations not yet realized.
Since that time, the examination of longitudinal piping welds has been completed and no limitations were noted.
i 4
1 B-4
,.,,,-.._.._.m_
_,..__,.,,-.x
4e r
I H.
NRC Ouestion Paragraph 1.13 of the Program states: "The relief j
requests will address the area of relief, ASME Code examination requirements, Code item no. and category, if applicable, basis for relief, and alternate examin-ation, if any,"
If requesting a partial relief from a Code requirement, also include an estimate of the percentage of the Code required examination that is being completed.
The relief requests are not included in Revision 2 of the Unit 2 PSI Program, as the Applicant states that the examinations are presently being performed.
E=timate when the requests for relief for Vogtle Unit 2 PSI will be received for staff evaluation.
GPC Resoonse Relief requests are incorporated into Section 6.0 of the Preservice Inspection Plan, Revision 3 which is enclosed.
As requested, relief requests which have partial Code required coverage are shown with estimated percentages.
i i
I B-5 i
. _ _ _., _ _ _ _ _. _ _ _ _ _ _