ML19323C984
| ML19323C984 | |
| Person / Time | |
|---|---|
| Site: | Crystal River  |
| Issue date: | 05/14/1980 |
| From: | Richard Bright FLORIDA POWER CORP. |
| To: | Reid R Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 8005190496 | |
| Download: ML19323C984 (3) | |
Text
_p Ch 6006190496 n%g. a
.$MEQ If, w m.. Wg $.4 f 2 QN; var % 3f# Florida Power CO NPOn a r som May 14, 1980 File: 3-C-4 Mr. Robert W. Reid Chief Operating Reactors Branch #4 Division of Operating Reactors U.S. Nuclear Regulatory Commission Washington, DC 20555
Subject:
Crystal River Unit 3 Docket No. 50-302 Operating License No. DPR-72 Automatic Initiation of Emergency Feedwater Flow
Dear Mr. Reid:
In our letter to your office dated May 1,1980 our plans for adding an automatic start feature to the motor-driven emergency feedwater pump (EFP-1) were described. This letter supplements the first and further describes our plans and some problems associated with them. Based solely on calculations, it was determined that the Engineered Safeguards (ES) Blocks and EFP-1 would draw a load of 3181 KW on the "A" train diesel generator. After the initial 30 minutes, EFP-1 would auto-matically trip, thereby reducing diesel generator loading below the 2000 hour rating of 3000 KW. The diesel generator vendor could not sup-port continued operation at or near 3000 KW for 2000 hours after the initial 30 minute load of greater than 3000 KW. FPC has, therefore, formulated a new plan of action for the implementation of the automatic start of EFP-1 described in our previous letter. Final Safety Analysis Report (FSAR), Table 8-1, tabulates the theoret-ically predicted values of loading on the "A" train diesel generator under worst case conditions. The.es v31ues are based on manufacturer supplied curves and therefore reprcent a best estimate for power load-ing under worst case conditions. A preliminary test was performed in mid-1979 to verify actual diesel generating loading ut. der simulated con-ditions requiring all ES Blocks. After starting all motors in the four (4) ES Blocks, the manually applied loads were started resulting in a diesel generator loading of 2520 KW. It was further demonstrated that EFP-1 drew 340 KW for a total diesel generator loading of 2860 KW. General Office 3201 Thirty fourtn street soutn. P O Box 14o42, St Petersburg. Florida 33733 e 813-866 5151
Mr. Robert W. Reid Page Two May 14, 1980 Worst case conditions (loss of "B" train diesel generator) were simula-ted by use of various valve lineups and establishing precalculated flow rates in recirculation flow paths. Based on the results of this preliminary test, FPC now intends to imple-ment the design change as described in our previous letter and perform an operational test of "A" train diesel generator loading during Crystal River Unit 3 (CR3) startup. Based on the results of the preliminary test, FPC is optimistic that diesel generator loading will be within the 2000 hour rating of 3000 KW. If, however, 3000 KW is exceeded, FPC in-tends to remove the automatic start feature of EFP-1 associated with electrical power supplied by "A" train diesel generator and reinstitute administrative controls presently in effect and described, in part, by FSAR Section. 8.2.3. At that point, FPC will reevaluate the near-term solution to the automatic start of EFP-1 and further correspondence from this office will result. FPC is also experiencing difficulties acquiring environmentally and seismically qualified timers for EFP-1 automatic start circuitry. The vendor has indicated a lead time of 26 weeks for the required parts. A non-qualified timer could be available considerably quicker and FPC has decided to use it on an interim basis, replacing it when the qualified timer becomes available. If you have any questions concerning our current plan of action, please contact this office. Sincerely, FLORIDA POWER CORPORATION j Ronald M. Bright Acting Manager Nuclear Support Services RMBemhFfD3 }v L
STATE OF FLORIDA COUNTY OF PINELLAS R. M. Bright states that he is the Acting Manager, Nuclear Support Services Department of Florida Power Corporation ^; that he is authorized on the part of said company to sign and file with the Nuclear Regulatory Comission the information attached hereto; and that all such statements made and matters set forth therein are true and correct to the best of his knowledge, information and belief. i 1 Laa La R. M. BrigKt Subscribed and sworn to before me, a Notary Public in and for the State and County above named, this 14th day of May,1980. uYhmsJ Notary Public l Notary Public, State of Florida at Large, My Commission Expires: August 8, 1983 i. l l 1 ..y,_y m g -}}