ML20204G286
| ML20204G286 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 03/17/1999 |
| From: | Alexander J BOSTON EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 2.99.030, NUDOCS 9903260122 | |
| Download: ML20204G286 (5) | |
Text
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/m L g)3 Boston Edison Q!
A SEC ENERGY COMPANY March 17,1999 BECo Ltr. 2.99.030 i
U.S. Nuclear Regulatory Commission I
Attn: Document Control Desk Washington, DC 20555 Docket No. 50-293 License No. DPR-35 Reauest for Approval to Use ASME Code Case N-573 As An Alternative to ASME Article IWA-4000 Pursuant to 10 CFR 50.55a(c)(3)(i), Boston Edison Company (BECo) hereby requests NRC j
approvel to use ASME Code Case N-573 for weld procedures as an attemative to ASME Article J
ASME Section XI, Article IWA-4000 provides for welding and brazing procedure qualification requirements. The Code Case N-573 provides for alternatives to the welding and brazing procedure qualification requirements by transfer of procedure qualification records between the l
Owners with Quality Assurance Programs that satisfy ASME Article IWA-1400.
The NRC approval relates to the use of ASME Code Case N-573, dated March 12,1997, to transfer weld procedures between NRC licensees. The transfer of weld procedure qualification reccrds is described below:
- 1. BECo anticipates incorporation of Yankee Atomic WeiJ procedures into the RECo Weld program complying with the provisions (a) to (h) of Code Case N-573. These weld procedures were used at NRC licensees, Vermont Yankee, Seabrook, Maine Yankee, and Yankee Rowe, in accordance with their Quality Assurance ?rograms.
- 2. BECo will complete the documentation and obtain information as stated in paragraphs (c),
(d), and (e) of Code Case N-573, if required. Also, BECo will demonstrate technical competence in the application of each procedure qualification record by completing a performance qualification test using the parameters of the resulting weld procedure specification.
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- 3. The use of the Code Case will be documented on NIS-2 Form specifying any weld repair / replacement performed using the Code Case.
r-The use of the ASME Code Case N-573 as an alternative to Article IWA-4000 would provide an acceptable level of quality and safety because the transfer of weld procedure will be accomplished within the scope of the Quality Assurance Program between the NRC licensees and the weld procedures have been previ yd at NRC licensed facilities. Therefore, the Pilgrim Nuclear Power Station, Rocky Hill Road, Plymouth, Massachusetts 02360 9903260122 990317 7
PDR ADOCK 05000293 N P
PDR d
T use of Code Case N-573 would not impact the safe operation of Pilgrim Station and health and l
safety.of the public.
NRC approval of the Code Case N-573 is requested by April 16,1999, in support of Pilgrim Refueling Outage 12. We would need two weeks to develop N-573 compliance documentation to support the outage. - The outage is scheduled to start on May 8,1999. We have enclosed copies of Code Case N-573 and ASME Article IWA-4000 in support of NRC review and
- approval.
If you have any questions regarding the information contained in this letter, please contact Walter Lobo at (508) 830-7940.
l J..
xander clear Assessment Group Manager WGUcis 299030
Enclosure:
Code Case N-573 and ASME Article IWA-4000 cc:
Mr. Alan B. Wang, Project Manager Project Directorate 1-3 Office of Nuclear Reactor ReicJl6 tion Mail Stop: OWFN 8F2 U. S. Nuclear Regulatory Commission 1 White Flint North 11555 Rockville Pike Rockville, MD 20852 U.S. NRC, Region 1 475 Allendale Road j
King of Prussia, PA 19406
{
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Senior Resident inspector l
Pilgrim Nuclear Power Station l
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CASE N-573 cAsss or ASME BOE.ER AND PRES 8URE VESSEL CODE Approval Date: Mereti 12, 1997 see Numeric Index for amirnrion amt any reoninnarion detes.
Case N 673 Assurance Ptostun that satis 6es the 66-of Truasfer af Proce(aire C
-^"-- Records IWA 1400.
Between Owners (c) The Owner eer the h PQR shall Secties XI. Diviales 1 accept sosponsibility for M*=g any Nnaal sup.
porting informaden needed for WPS developinent.
Angedry.* What alternatins to & welding and brua.
(d)'Ihe Owner =-it; the nnenpinend PQR shall lag procedese apaha*iaa r.qs :n of IWA 4000 da~~. on each reentting WPS, the param *,ters appli-my be med?
cable to welding. Each WPS shall be suppwled by all necessary PQR s.
(e) N Owner accepting ab E.' " PQR shall M* It is b opinion of the Comaduee that m
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an sharastive to the welding and brazing procedure innn a
f each WPS gh roquarements of IWA4000, a psocedure k
h PQR.
tiatinearian record (PQR) quali6ed by cae Owner (f) The Owner =~~wia the a-A PQR shall may be need by another Owner. When this hw
,laranneerste technical o'omgIstones in appucation of the Is used, the foDowing tecpW shall be met:
tsceived PQR by completing a performance quallocation (a) h Owner that perfonned the procedure quall6*
test using the p :. of a resuldag WPS.
cation test shall eerdfy, by signing the PQR, that testing (g) b Owner may accept and use a PQR only was perfonned la sca,h with Section IX.
when it is tsceived directly from the Owner that certified l
(4) The Owner that performed tir ;vocedure qualin-the PQR.
cation test shall cerdfy, in writing, tee; the procedure (h) Use of this Case shall be shown on the NIS-2 quellAcadion was cand>= tad in accordance wkh a Quahey form & --
--5 welding or brazing e.
e
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ARTICLE IWA-4000 REPAIR PROCEDURES IWA 4100 GENERAL Owner shall conduct an evaluation of the suitability of IWA4110 SCOPE I E#
Repairs shall L made in accordance Mth thisrepair. The evaluation should consider cause(s) of Article and IWB-40dO for Class 1 pressure retaining failure to ensure that the selected repair procedure is N
- suitable, components, IWC-4000 for Class 2 pressure retaining components, IWD4000 for Class 3 pressure retaining (c) Repair programs shall be subject to review by the enforcement and regulatory authorities having components, and IWF4000 for component supports.
jurisdiction at the plant site.
IWA-4120 ADDITIONAL RULES AND REQUIREMENTS IWA 4140 INSPECTION Repairs shall be performed in accordance with the The services of an Authorized Inspection Agency Owner's Design Specification and Construction Code shall be used when making a welded repair. The of the component or system. Later editions of the Owner shall notify the Authorized Inspectior. Agency Construction Code or Section III, either in its entirety prior to starting the repair and keep the Inspector k
or portions thereof, may be used. If repair welding informed of the progress of the repair so that cannot be performed in accordance with these require-necessary inspections may be performed.
ments, the following may be used:
(a) IWB4000 for Class I components (b) IWC4000 for Class 2 components IWA-4200 MATERIAL (c) IWD-4000 for Class 3 components Material shall conform to the requirements of either the original Design Specification or Section Ill.
IWA 4130 REPAIR PROGRAM (a) Repair operations shall be performeo in accor.
IWA-4300 WELDING AND WELDER dance with a program delineating essential require-QUALIFICATIONS ments of the completc repair cycle meloding (1), (2),
(INCLUDING WELDING and (3) below:
~
OPERATORS)
(1) the nondestructive examination method which revealed the flaw and the description of the (a) All welding sliall be performed in accordance flaw; with welding procedure specifications which have been (2) the flaw removal method, method of measure qualified by the Owner or repair organization in raent of the cavity created by removing the flaw, and-accordance with the requirements of Section IX and dimensional requirements for reference points during the additional requirements of Section III and XI and after the repair; (b) All welders shall be qualified by the repair (3) weld procedure and postweld heat treatment organization in accordrace with the requirements of if applicable, and nondestructive examination program Section IX and the additioni requirements of Sections to be used after the repair.
III and XI.
(b) Prior to authorizing repa..; by welding (c) We?ders need not be employed directly by the
, the repair organization provided the use of such welders is 26
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ARTICLE IWA-4000 REPAIR PROCEDURES IWA-4100 GENERAL Owner shall conduct an evaluation of the suitability of IWA-4II0 SCOPE the weldirg procedure (s) to be used to make the Repairs shall be made in accordance w'th this repair. The evaluation should consider cause(s) of i
failure to ensure that the selected repair procedure is Article and IWD-4000 for Class 1 pressure retaining suitable.
components, IWC-4000 for Class 2 pressure retaining (c) Repair programs shall be subject to review by components, IWD4000 for Class 3 pressure retaining the enforcement and regulatory authorities having components, and IWF-4000 for component supports.
jurisdiction at the plant site.
IWA4120 ADDITIONAL RULES AND IWA 4140 INSPECTION REQUIREMENTS Repairs shall be performed in accordance with the The services of an Authorized Inspection Agency Owner's Design Specification and Constraction Code shall be used when making a welded repair. The of the component or system. Later editions of the Owner shall notify the Authorized Inspection Agency prior to starting the repair and keep the Inspector Construction Code or Section III, either in its entirety informed of 6 progress of the repair so that or portions thereof, may be used. If repair welding necessary inspe..ns may be performed.
cannot be performed in accordance with these require-ments, the following may be used:
(a) IWB-4000 for Class I components (b) IWC-4000 for Class 2 components IWA-4200 MATERIAL (c) IWD-4000 for Class 3 components Material shall conform to the requirements of either the original Design Specification or Section III.
IWA 4130 REPAIR PROGRAM (a) Repair operations shall be performed in accor' IWA-4300 WELDING AND WELDER dance with a program delineating essential reouire' QUALIFICATIONS ments of the complete repair cycle including (1), (2),
(INCLUDING WELDING tnd (3) below:
OPERATORS)
I (1) the nondestructive examination method l
which revealed the flaw and the description of the (a) All welding shall be perfonned in accordance flaw; with welding pra edure specifications which have been I
(2) the flaw removal method, method of measure.
qualified by the Owner or repair organization in
)
ment of the cavity created by removing the flaw, and a:cordance with the requirements of Section IX and l
dimensional requirements for referew joints during the additional requirements of Sections III and XI.
end after the repair; (b) All welders shall be qualified by the repair (3) weld procedure and postweld heat treatment, organization in accordance with the requirements of if applicable, and nondestructive examination program Section IX and the additional requiremems of Sections Ill and XI.
to be used after the repair.
(c) Welders need not be employed directly by the (b) Prior to authorizing repairs by welding, the repair organization provided the use of such welders is 26 t
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l GENERAL REQUIREMENTS IWA-4300-IWA-4700 controlled by the Quality Assurance Program of the ated valves that are 1 in. nominal pipe size and
- m,h.
repair organization. This Program shall include the smaller.
following:
Repairs made in accordance with a procedure which (1) requirements for complete and exclusive ad-ministration and technical supervision of all welders e,I]owa exception from postweld heat treatment shall not be exempted, by the repair organization; (1) requirements for contractual control which
)
provides the necessary authority to assign and remove welders at the discretion of the repair organization; N
(3) evidence that the Quality Assurance Program (a) The repaired areas shall be examined to estab-is acceptable to the Owner's Authorized Nuclear lish a new preservice record. The examinations shall Inservice Inspector.
include the method that detreted the flaw.
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(b) If the repair includes the complete removal or isolation of the item bearing the flaw, such as heat IWA4400 PRESS'URE TEST exchanger tube plugging, (a) above shall int apply.
(a) After repairs by welding on the pressure retain-ing boundary, a systern pressure test shall be per-formed m accordance with IWA-5000.
IWA 4600 REPLACEMENTS (b) The following may be exempted from the The rules and requirements of this Artich. shall system hydrostatic pressure tests:
apply to the attaching of replacements (as defined in j
(1) cladding repairs; IWA-7110) to the system where such attachment is by (2) heat exchanger tube plugging; welding.
(3) piping, pump, and valve repairs that do not penetrate through the pressure boundary; (4) pressure vessel repairs where the repaired cavity does not exceed 10% of the minimum design IWA-4700 RECORDS i
wall thickness; The records required by IWA-6000 shall be com-(5) component connections, piping, and associ-pleted for all repairs.
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