ML19253B572
| ML19253B572 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 10/09/1979 |
| From: | Stewart W FLORIDA POWER CORP. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| 3--3-A-3, 3-0-3-A-3, NUDOCS 7910160423 | |
| Download: ML19253B572 (5) | |
Text
{{#Wiki_filter:. 244*o 4 O kNh* O &y ;) C,e nm 3* ' ) %:D 94' >;%y 3_p* 2 4.,, bM Power CO m eo n a Y co m October 9, 1979 File: 3-0-3-a-3 Mr. Robert W. Reid, Chief Operating Reactors Branch #4 Division of Operatin; Reactors U.S. Nuclear Regulatory Commission Washington, D.C. 20555
Subject:
Crystal River - Unit 3 Docket No. 50-302 Operating License No. DPR-72 Reactor Coolant Pump Power Monitors
Dear Mr. Reid:
Enclosed are the Required Response Spectrum curves for the potential transformers and current transformers as requested by your Mr. Chen in a recent telephone conversation. This information is in addition to and a clarification of that submitted in our letter of August 14, 1979. If you or Mr. Chen have any further questions on this subject, please contact me. Sincerely, FLORIDA POWER CORPORATION W. P. Stewart j - lbh Manager, Nuclear Operations i WPSemhMm D5 791016o %2.3 General Office 3201 Tniny fourin street sooe. p o som 14o42. si pere sourg. F+onca 33733 813 - 866-5151
~ Gilbert / Commonwealth eng,neers and censultants G;LEERT ASSOC!ATES. INC. P. O. Ecx 1498. Rea6ng. PA 13603, Tet 215 775 2500, Cr 4 Gdasec/Te!en 836431 I. October 3, 1979. P. l'G . H I. t -- Mr. D. A. Shook ' T~ ', Manager, Nuclear Engineering {'. Florida Power Corporation P. O. Box 14042/H-8 v. St. Petersburg, Florida 33733 N /. ' - Re: Crystal River Unit #3 Power Level Upgrade Seismic Test for Potential Transformer and Current Transformer NRC Concerns Sub #014 Letter FCS-730
Dear Mr. Shook:
Your Mr. Steve Ulm called CAI on September 27, 1979 regarding a recent communi-cation with Mr. Chen of the NRC about seismic testing of the JVM4 and JCM4 transformers recently added to the PT and CT cabinets. Mr. Chen, when called by M. R. Wardrop of GAI, raised questions about the seismic test report by Harris Corporation, dated May 10, 1979, and additional data transmitted to FPC on July 30, 1979. The major concerns of Mr. Chen are: (1) that the tests performed by Harris Corporation employ a method not normally used to seismically qualify equipment, and (2) the Required Response Spectra for the tested equipment has not been pro-vided. These same concerns were expressed earlier by Mr. Arnold Lee of the NRC. The data contained in the Harris transmittal of July 30, 197.9 was an attempt to explain the correlation of Power Spectral Density versus Frequency Curve and the Required Response Spectrum Curve for the transformers. From the data provided, it is not possible to make the stated correlation. The transformer cabinets are located in the Intermediate Building at elevation 119'-0", this being the ground floor, and there is no floor response spectrum curve for the desiga of equipment installed at or near that elevation. Therefore, the Ground Acceleration Spectra was used to compare with the Test Response Spectrum. Attached is a copy of the " Maximum Hypothetical Acceleration Spectra", as it ap-pears in the Crystal River Unit 3 FSAR. On this Spectra sheet we have plotted the " Harris" response spectrum data for the transformers for both 2".' and 7% damp-ing. The transformer cabinets were not seismically tested and it is assumed that 525 tanure annue Seau, na, vor; art:.. a:a v.,, s,is s. e.eg sa 2 5 ns-2sr g 203 East Wasug*.:n A.ea e.amon V1517 728 3000 i 90 Pire Sinet *vem fort Y M 4227U u
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. Y.Ibert/ Commonwealth - w-$ G Mr. D. A. Shook aner awms <. e a s., w % n wa r. n mm re. w r~ n o Florida Power Corporation FCS-795 October 3, 1979 Page the difference between the " Harris" spectra and the ground spectra vill cover the amplification of the cabinets. The 7% damping curve is used for comparison with the 0% of critical damping curve of the acceleration Spectra. Based on this comparison it appears that the subject transformers are seismically quali-fied for installation in the Crystal River Unit 3 Intermediate Building at ele-vation 119'-0". If you require additional comment, please call. Very truly yours, N k. M. R. Wardrop Project Structural Engineer }o. ~ F. J maz Project Manager MRW:geb Attachment cc: D. A. Shook w/ attach. R. C. Bonner F. J. Tomazic (2) w/ attach. M. Ober w/ attach. C. Chen w/ attach. Structural File w/ attach. I154 161
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