ML023050165
| ML023050165 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 10/30/2002 |
| From: | Jabbour K NRC/NRR/DLPM/LPD2 |
| To: | Howe A NRC/NRR/DLPM/LPD2 |
| Shared Package | |
| ML023050141 | List: |
| References | |
| TAC MB5309 | |
| Download: ML023050165 (2) | |
Text
October 30, 2002 MEMORANDUM TO: Allen G. Howe, Chief, Section 2 Project Directorate II Division of Licensing Project Management FROM:
Kahtan N. Jabbour, Senior Project Manager, Section 2 Project Directorate II
/RA/
Division of Licensing Project Management
SUBJECT:
BROWNS FERRY UNIT 2 DRAFT QUESTIONS REGARDING RELIEF REQUESTS (2-ISI-6, 2-ISI-13, AND 2-ISI-15) CONCERNING ASME SECTION XI, INSERVICE INSPECTION PROGRAM (TAC NO. MB5309)
The attached draft questions (Attachment 1) were faxed to the licensee to allow them to prepare for a conference call. However, in lieu of the call, the licensee provided its responses to the draft questions (Attachment 2). The staff indicated that the responses are acceptable.
On this basis, the licensee stated that it will document the questions and its responses in the near future.
Docket No: 50-260 Attachments: As stated
October 30, 2002 MEMORANDUM TO: Allen G. Howe, Chief, Section 2 Project Directorate II Division of Licensing Project Management FROM:
Kahtan N. Jabbour, Senior Project Manager, Section 2 Project Directorate II
/RA/
Division of Licensing Project Management
SUBJECT:
BROWNS FERRY UNIT 2 DRAFT QUESTIONS REGARDING RELIEF REQUESTS (2-ISI-6, 2-ISI-13, AND 2-ISI-15) CONCERNING ASME SECTION XI, INSERVICE INSPECTION PROGRAM (TAC NO. MB5309)
The attached draft questions (Attachment 1) were faxed to the licensee to allow them to prepare for a conference call. However, in lieu of the call, the licensee provided its responses to the draft questions (Attachment 2). The staff indicated that the responses are acceptable.
On this basis, the licensee stated that it will document the questions and its responses in the near future.
Docket No: 50-260
Attachment:
As stated Distribution Public KJabbour AHowe NSanfilippo BClayton (Hard Copy)
PDII-2 R/F BElliot DOCUMENT NAME: G:\\PDII-2\\Browns Ferry\\MB5309 Memo to Allen Package: ML023050141 : ML023030205 ADAMS ACCESSION NO. ML023050165 OFFICE PDII-2/PM PDII-2/LA PDII-2/SC NAME KJabbour BClayton AHowe DATE 10/ /2002 10/28/2002 10/ /2002 OFFICIAL RECORD COPY
DRAFT Request for Additional Information Browns Ferry Nuclear Plant, Unit 2 (BFN-2)
ASME Section XI, Inservice Inspection Program Request for Relief
- 1. Request for reliefs 2-ISI-6 and 2-ISI-13 requests relief from for nine reactor pressure vessel (RPV) nozzle-to vessel full penetration welds and for the RPV standby liquid control nozzle inside radius section, respectively. The proposed examination of the nine RPV nozzle to vessel welds is to be performed using ultrasonic examination from the outside of the vessel. The percent coverage for these nozzles is 56% to 72%. The proposed examination of RPV standby liquid control nozzle inside radius is to be visual (VT-2) examination in conjunction with the Class 1 system leakage test. The Advanced Inservice Reactor Inspection System 21 device (AIRIS 21) and Enhanced Data acquisition System-II equipment (EDASTM-II) is used to ultrasonically inspect longitudinal shell welds from the inside surface of the RPV.
a) Identify the percent of coverage for flaws located at the clad and nozzle weld interface when ultrasonic examination is performed in accordance with request for relief 2-ISI-6.
b) Explain why the AIRIS 21 and EDASTM-II can not be utilized for examination of the welds and inside radius section discussed in request for relief 2-ISI-6 and 2-ISI-13.
c) Identify the increase in NDE examination coverage expected if the AIRIS 21 and EDASTM-II equipment can be utilized for ultrasonic examination.
- 2. Pertaining to Relief Request 2-ISI-15, the licensee identified Code Case N-577, "Risk-Informed Requirements for Class 1, 2, or 3 Piping, Method A," as being the applicable Code requirement.
The NRC has not approved this Code Case for use. However, N-577 does serve as a reference to relate the IGSCC welds, which fall under Browns Ferrys risk-informed ISI (RI-ISI) program, back to the true Code requirement, which is IWB-2500, Table IWB 2500-1, Figure IWB-2500-8(c).
Therefore, relief should be requested from the requirement of ASME Code,Section XI, IWB-2500, Table IWB-2500-1. Please indicate which examination categories and item numbers from IWB-2500 apply to these welds (i.e. B-J, B-F, etc.)
- 3. In the licensees basis for relief request 2-ISI-15 they state:
"Welds GR-2-15(OL) and DRHR-2-03 were examined in April 1999, prior to the Performance Demonstration Initiative (PDI) Program requirements being mandated by 10 CFR 50.55a(b)(2)(xv)(A)(2), utilizing NDE methods and techniques to the requirements of ASME Section XI Code, 1989 Edition, No Addenda."
Is 1989 supposed to read 1986, since that is the applicable Section XI code edition for the relief?
Attachment 1