ML18005A570
| ML18005A570 | |
| Person / Time | |
|---|---|
| Site: | Harris  |
| Issue date: | 08/26/1988 |
| From: | Loflin L CAROLINA POWER & LIGHT CO. |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| NLS-88-207, NUDOCS 8809070440 | |
| Download: ML18005A570 (7) | |
Text
ACCEIZMTED DISTRIBUTION DEMONSTRATION SYSTEM REGULATORY INFORMATION DXSTRIBUTION SYSTEM (RIDS)
ACCESSION NBR:8809070440 DOC.DATE: 88/08/26 NOTARIZED: NO FACIL:50-400 Shearon Harris Nuclear Power Plant, Unit 1, Carolina AUTH.NAME AUTHOR AFFILIATION LOFLIN,L.I.
Carolina Power
& Light Co.
RECIP-NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)
DOCKET 05000400
SUBJECT:
Requests that Relief Request R1-003 be granted for Weld XI-SI-026SI-FW-543 by 880906 to support refueling schedule.
DISTRIBUTION CODE: A047D COPIES RECEIVED:LTR ENCL SIZE-TITLE: OR Submittal: Inservice Inspection/Testing/Relief from AS C
NOTES:Application for permit renewal filed.
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ggQ[l, Caroline Power & Light Compeny AUG2 6888 SERIAL:
NLS-88-207 United Stat:es Nuclear Regulatory Commission ATTENTION: Document Control Desk Washington, DC 20555 SHEARON HARRIS NUCLEAR POWER PLANT DOCKET NO. 50-400/LICENSE NO. NPF-63 INSERVICE INSPECTION RELIEF REQUEST Gentlemen:
Carolina Power
& Light (CP&L) submited on January 28, 1988 the Shearon Harris Nuclear Power Plant Ten Year Inservice Inspection Plan for the first 10 year interval.
The Plan described the examinations and schedules for performing ASME code inspections of Class 1,2 and 3
components and supports as required by 10CFR50.55(a).
The Plan also included relief requests, which pursuant to 10CFR50.55a(g),
required NRC approval.
Relief Request Rl-003 requested relief from performing complete volumetric examination on certain circumferential piping welds and branch pipe connections welds due to pipe configurations not being conducive to 100 percent volumetric examinations.
Included in the relief request was weld II-SI-026SI-FW-543.
This weld was not originally scheduled for inspection during the first inspection in[erval.
- However, as a result of actions required by NRC Bulletin 88-08 CP&L will examine this weld during the refueling outage currently in progress.
Therefore granting of the requested relief is necessary for this weld.
The basis and technical justification for granting relief from 100%
volumetric examination of this weld was provided in Relief Request Rl-003 submitted with the ISI plan in January of this year.
The relief request and the listing of components requested for relief are attached for your convieneince.
In order to support the refueling schedule, CP&L requests that the relief requested for this weld be granted by September 6,
1988.
NRC Bulletin 88-08, Thermal Stresses in Piping Connected To Reactor Coolant Systems, Dated June 22, 1988.
SS09070440 SSOS26 PDR ADOCK 05000400 PDC j
i" 411 Fayettevilte Street o P. O. Box 1551 o Raleigh. N. C. 27602
Document Control Desk NLS-88-207 / Page 2
Carolina Power
& Light has reviewed this request in accordance with 10CFR170.12, and a check for $150.00 in payment of the required fee is enclosed.
Please refer any questions regarding this submittal to Mr. Steven Chaplin at (919) 836-6623.
Yours very truly, L. I. Lof n
Manage Nuclear Licensi g Section LIL/SDC Enclosures cc:
Mr. B.
C. Buckley Dr. J. Nelson Grace Mr. W. H. Bradford
REQUEST'OR RELXEF NO. R1-003, PRESSURE RETAINING CIRCUMFERENTIAL WELDS, CATEGORY B-J:
ITEM B9.11'ND BRANCH PXPING CONNECTIONS WELDS~
CATEGORY B-J:
ITEMS B9-31 IDENTXFICATXON OF COMPONENTS:
Pressure retaining circumferential piping welds, and branch pipe connections welds as listed on attachment for this Relief Request.
ASME SECTION XI CODE REQUIREMENTS:
Examination category B-J, Item (s) 9.11 and 9.31 requires a
surface (P.T.)
and volumetric (U.T.) examination be performed on greater than or equal to 4 in. nominal pipe size circum-ferential piping welds, and branch pipe connection welds on greater. than or equal to 4 in. nominal pipe size piping.
CODE RELIEF REQUEST:
Relief is requested from performing 100 percent volumetric (U.T. ) examination on greater than or equal to 4 in. nominal pipe size circumferential piping welds and branch pipe connec-tion welds due to pipe configurations (reducer to tee, pipe to
- tee, pipe to flange...) not being conducive to 100 percent volumetric (U.T.) examinations.
ALTERNATE EXAMINATIONS:
Piping systems will be subject to system leakage pressure tests and be visually (VT-2) examined during each refueling outage.
fields will be volumetrically (U.T. ) examined, to the maximum extent possible, in accordance with the Inservice Inspection Program Schedule.
In addition, the components will be subject to system pressure tests during each refueling outage.
BASXS FOR REQUESTXNG RELIEF:
Piping weld configurations (reducer to tee, pipe to tee< pipe to flange) are not conducive to performing 100 percent volume-tric (U.T.) examination from both sides of the weld, as required by ASME Section XI (Code Case N-335-1).
Some arrange-ments and details of the piping systems and components were designed and fabricated before the access and examination requirements of the ASME Section XI Code, and especially the requirements of Code Case N-335-1 could be applied.
Conse-quently some exams are limited or not practical to perform due to geometric configuration, or accessibility.
The limitations exist at fitting to fitring joints, where geometry and surface conditions preclude ultrasonic coupling, or access for the required scan length (Ref. Attached computer data indicating the estimates of code requiring examination coverage that may be completed on the individual components requiring-relief).
Page 1 of 3
Rl-003 Cont.
CONSTRUCTION CODE EXAMXNATIONS:
Volumetric Surface TECHNICAL JUSTIFICATION FOR REQUESTING RELIEF:
Required ASME Section XI Code (Code Case N-335-1) volumetric (U.T.) examinations can not be 100 percent completed on listed piping welds due to piping configurations not being conducive to volumetric (U.T.) examinations.
During preservice activities, examinations in limited areas were accomplished as a best effort attempt to cover as much of the code required area or volume as possible (generally, the weld and base metal of 1 "T" on each side).
- However, the extent of examination coverage could not be specifically qualified as being 100 percent.
These areas where complete examination of 100 percent of the required volume of area could not be achieved are documented on each applicable examination data sheet, and the limited cause noted.
The principal basis of partial examination is to identify the inability to examine 100 percent of. the required base metal volume for 1 "T" distance beyond the edge of the weld on a fitting or component.
Examples are:
(1) Ultrasonic examination of a pipe to elbow assembly, where scanning on the intrados of the elbow causes decoupling of the sound beam and; (2)
A pipe to flange or valve assembly where scanning the entire volume on the fitting or component side is limited by configuration.
The resulting coverage is such that examination of the 'weld, heat affected zone and base metal of 1 "T" on indetermined coverage of the base metal on the fitting or component side may be during this pipe side
- scan, depending on the calibrated sweep length, attentua-tion, joint configuration, etc.
- However, the volume on the fitting or component side additionally cannot be scanned completely for transverse indications when Code required.
In either case, 100 percent of this 1 "T" volume cannot be
- assured, thus a partial examination is required as a dis-claimer to having satisfied Code requirments, albeit the intent is satisfied to the extent practical.
Specific limitations and restrictions for all examinations are as indicated on the attached computer listing and the specific data sheet.
page 2 of 3
4
~
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Rl-003 'Cont.
No impact on plant quality, safety, or reliability is expected as the systems will be subject to system leakage pressure tests and will be visually (VT-2) examined during refueling outages.
Systems will also be subject to hydrostatic testing at the end of the ten (10) year interval.
This Request for Relief (Rl-003) is applicable to the SHNPP Unit 1 First Ten (10) Year Interval Inservice Inspection Program.
Page 3 of 3
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ISI'ELIEF REQUEST Rl-003:
COMPONENTS REQUESTED FOR RELIEF
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~ f '0 4 f 4li44 COMPHOEX COMPDES CATEGO ITEMHO EXSCHD COMMENTS II-SI-023RC-FW-299 II-SI-02351-FW-611 II-SI"02351-FW-612 II-51-02351-FW-614 II-SI-024RC-FW-293 II-51-02451-FW-585 II-SI-02451-FW-587 II-SI-02451-FW-588 11-51-02551-FW-536 I I-SI-02551-FW"537 I I-51-02551-FW-539 I I-SI-02651-FW-543 I I-51-02651-FW-544 I I-SI-02651-FW-546 I I-SI-027RC-FW" 298 II-SI-02751-FW-54'I 11-SI-02751-FW-542 II-51-02751-FW-602 II-51-026RC-FW-296 II-51-02651-FW-534 I I-SI-02851-FW-535 II-SI-02851-FW-595 PC,PIPE-PC,NOZ PC,PIPE-PC,VLV PC,VLV -PC,PIPE PC,VLV -PC
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