ML20072H563
| ML20072H563 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 03/25/1983 |
| From: | Westafer G FLORIDA POWER CORP. |
| To: | Harold Denton Office of Nuclear Reactor Regulation |
| References | |
| 3F-0383-27, 3F-383-27, NUDOCS 8303290477 | |
| Download: ML20072H563 (4) | |
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j$kkbf gp Florida Power C O a p o n a v s o ss March 25,1983
- 3F-0383-27 Mr. H. R. Denton, Director Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Wcshington, D. C. 20555
Subject:
Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 ASME Section XI Relief Request
Dear Mr. Denton:
The current Inservice Inspection Program at Crystal River Unit 3 (CR-3) is based upon the ASME Boiler and Pressure Vessel Code Section XI,1974 Edition through Summer 1975 Addenda. As you are Lware, CR-3 began a refueling outage on March 19,1983 and a number of examinations are scheduled to be performed this outage.
Some of these examinations cannot be performed to meet the applicable ASME Code requirement: using current state-of-the-art techniques.
In other cases, recently accepted methods are superior and are more consistent with anticipated future Code-rcquired examinations. Florida Power Corporation (FPC) hereby requests specific relief from ASME Section XI,1974 Edition through Summer 1975 Addenda, and proposes alternate examinations and m2thods as indicated in the " ATTACHMENT."
The Schedule information (see " ATTACHMENT") represents the current schedule for such cxaminations. For those which are in progress or are scheduled in the immediate future, FPC rcalizes that we could be faced with reexamination in these areas should we not be able to resolve these relief requests with your staff but we remain confident that such resolution will be forthcoming.
Florida Power Corporation has determined that this relief request involves a Class III amendment, per 10CFR120.22, in that it involves a single safety issue. Accordingly, the license amendment fee of four thousand dollars ($4,000.00) is enclosed.
Sincerely, A-G. R. Westafer M: nager Nuclear Licensing and Fuel Management l
Attachments OU cca Mr. 3. P. O'Reilly Regional Administrator, Region II Office of Inspection & Enforcement U.S. Nuclear Regulatory Commission l$
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2 101 Marietta Street N.W., Suite 2900 G
PDR Atlanta, GA 30303 General Office 3201 TNrty-fourth Street South e P.O. Box 14042. St. Petersburg. Fiorda 33733 e 813-866-5151
March 25,1983 3F-0383-27 ATTACHMENT 1.
FPC requests to use Article 4 of Section V as referred to by Section XI,1977 Edition through Summer 1978 Addenda, for ultrasonic examination of the reactor vessel, pressurizer, and steam generators in lieu of Appendix I of the 1974 Edition of Section XI.
Basis: - An improved reactor vessel inspection program has been prepared for CR-3 which is based on Regulatory Guide 1.150, Revision 0, June 1981-. This Guide refers to Article 4 of Section V,1977 Edition through Summer 1978 Addenda, for ultrasonic examination methods.
Article 4 of Section V is equivalent to Appendix 1 and consistent with anticipated future Code-required ultrasonic examinations.
Proposed Alternate Examination: - Article 4 of Section V,1977 Edition through Summer 1978 Addenda, will be used during the current refueling outage and hereafter to establish the ultrasonic examination methods for the referenced components.
Schedule - March 28,1983 2.
FPC requests to use the requirements of Section XI,1977 Edition through Summer 1978 Addenda, for examination of branch connection welds (examination Category B-3).
Basis - Because of weld and nozzle configurations for branch connections, complete volumetric examination required by the 1974 Edition of Section XI cannot be accomplished. This impracticality was recognized and revisions to the examination requirements were incorporated in the 1977 Edition through Summer 1978 Addenda.
The examination requirements c1 the Summer 1978 Addenda provide adequate assurance that pipe branch connection welds and base metal remain structually sound.
Proposed Alternate Examination - The examination methods and examination areas for all Class 1 piping branch connection welds will be chosen from Table IWB-2500-1 of the 1977 Edition of ASME Section XI through Summer 1978 Addenda during the current refueling outage and the eafter.
Sched'de - March 30,198?
3.
FPC requests relief from fuli volumetric examination of pipe to valve or pump welds which require examination of the weld and base material one wall thickness beyond the edge of the weld. (Categories B-3, C-F and C-G).
Basis - Using current state-of-the-art techniques, an examination from the pump or valve side of the weld cannot be performed using ultrasonic examination. The O.D.
configuration of these welds is such that it prohibits transmission of the ultrasonic wave from the transducer into the examination area from the valve or pump side.
Proposed Alternate Examination - For the current refueling outage and thereafter a best effort examinatica will be performed on as large a percentage of the examination area as pot,sible. Examination data will document what areas of the weld have been examined.
Schedule - April 15,1983
B March 25,1983 3F-0333-27 ATTACHMENT (Cont.)
4.
FPC requests to use the requirements of the 1977 Edition through Summer 1978 Addenda of ASME Section XI for examination of integrally ulded attachments as required by Table IWB-2500-1.
Basis - Geometric configuration of the supports may limit or prohibit ultrasonic examination of the supports in accordance with the requirements of ASME Section XI, 1974 Edition through Summer 1975 Addenda (Category B-K-1). ASME Section XI,1977 through Summer 1978 Addenda, allows surface examination of these attachments.
Geometric configuration allows a surface exam and this will meet the requirements of the 1978 Addenda.
Proposed Alternate Examination - The requirements of ASME Section XI,1977 Edition through Summer 1978 Addenda, Table IWB-2500-1 will be used for examination of Class 1 piping attachments during the current refueling outage and thereafter.
Schedule - April 28,1983 5.
FPC requests relief from volumetric examination of Class 2 piping welds in pipes with nominal wall thickness 0.5 inch and less (Items C2.1, C2.2, and C2.3, Examination C-F and C-G).
Basis - Reliability for detection and characterization of flaws in thin wall piping using procedures of the 1975 Summer Addenda is poor. This is mainly due to resolution problems inherent with the ultrasonic technique, weld joint configurations, and material properties in the case of austenitic welds. In some cases, the code required calibration reflector is over 50% of the pipe wall.
The 1977 Edition through Summer 1978 Addenda of Section XI requires a surface examination of Class 2 piping weldments 0.5 inch and less in thickness. A surface examination (magnetic particle or liquid penetrant) provides better sensitivity for detecting and sizing surface initiating flaws in this thickness range.
Proposed Alternate Examination - A surface examination will be performed on Class 2 i
welds with thickness 0.5 inch and less in accordance with the 1977 Edition through Summer 1978 Addenda of Section XI.
Schedule - April 5,1983 l
6.
FPC requests to use the Test Condition Holding time of Section XI,1977 Edition through Summer 1978 Addenda, Item IWA-5213 during System Pressure tests.
Basis -IWA-5213 of the 1977 Edition through Summer 1978 Addenda of ASME Section XI states "The holding time after pressurization to test conditions, before the visual examinations commence, shall be as follows:..... (d) system hydrostatic tests - 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> i
after attaining the test pressure and temperature conditions for insulated systems, and 10 minutes for noninsulated systems or components". The Code recognized that the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> hold time required by the 1975 Addenda on noninsulated components was impractical. The purpose of the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> hold time was to allow leakage to collect at low points of insulated components to allow detection by examiners. Since not all
g March 25,1983 3F-0383-27 ATTACHMENT (Cont.)
components are insulated, the 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> hold requirement is unnecessary and subjects the system to a longer period of vulnerability due to possible pressurization equipment malfunction or human error.
Proposed Alternate Examination - The Test Condition Hold Time of Section XI,1977 Edition through Summer 1978 Addenda, will be used during the current refueling outage and thereafter for system hydrostatic tests.
Schedule - In Progress 7.
FPC requests to use the temperature requirements of ASME Section XI,1977 Edition through Summer 1978 Addenda, Item IWC-5230 during System Pressure Tests of Class 2 components.
Basis - Section XI,1974 Edition through Summer 1975 Addenda, requires the system hydrostatic test be conducted at a test temperature of not less than 1000F. In the case of storage tanks or large sections of piping, large volumes of water would have to be heated to this temperature. This causes extreme difficulty in obtaining this amount of heated water and could possibly even result in local areas being heated beyond the system temperature design criteria.
Proposed Alternat_e Examination - The temperature criteria of IWC-5230 of ASME Section XI,1977 bdition through Summer 1978 Addenda, will be used during system hydrostatic tests on Class 2 components during the current refueling outage and thereafter.
Schedule -In Progress _
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