ML14184A741
| ML14184A741 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 09/21/1990 |
| From: | Mozafari B Office of Nuclear Reactor Regulation |
| To: | Eury L Carolina Power & Light Co |
| References | |
| TAC-75313 NUDOCS 9010020002 | |
| Download: ML14184A741 (3) | |
Text
September 21, 1990 Docket No. 50-261 Mr. Lynn W. Eury Executive Vice President Power Supply Carolina Power & Light Company Post Office Box 1551 Raleigh, North Carolina 27602
Dear Mr. Eury:
SUBJECT:
INSERVICE TESTING (IST) OF AFW SYSTEM - H. B. ROBINSON STEAM ELECTRIC PLANT, UNIT NO. 2 (TAC NO. 75313)
On August 16, 1989, the Carolina Power & Light Company (CP&L) informed the staff of the identification of inadequate net positive suction head (NPSH) for the Auxiliary Feed Water (AFW) pumps under certain operation conditions.
Your corrective program included the disassembly, examination and refurbishment of the AFW pumps. During the examination, CP&L found certain indications at the pump internals that could have resulted from operating under inadequate NPSH conditions. The staff had a concern with the inservice testing (IST) program of the AFW in that the program had apparently failed to identify inadequate NPSH problems.
On September 28, 1989, the staff forwarded CP&L a list of questions concerning the effectiveness of the IST program of the AFW system at H. B. Robinson 2.
CP&L responded to these questions in a letter dated November 10, 1989. The staff concludes that the main factor for failure to detect any problems associated with the insufficient NPSH by the IST program was the error in baseline NPSH assumptions when conducting the tests. This error has been corrected by the licensee with the AFW modification completed in November, 1989. Because this was a unique problem at the Robinson plant, we conclude that it is not a generic IST issue. No further action is required on this issue.
Sincerely, Orignal signed by:
Brenda Mozafari, Acting Project Manager Division of Reactor Projects - I/Il Office of Nuclear Reactor Regulation cc:
See next page DISTRIBUTION See attached page v
S E PREVIOUS CONCURRENCE OFC
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- TSullivan EAdensam
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OFFICIAL RECORD COPY 1100200n. 900921 Document Name:
LTR EURY 75313 I5R ADOCK 05000261 P
Mr. L. W. Eury H. B. Robinson Steam Electric Carolina Power & Light Company Plant, Unit No. 2 cc:
Mr. R. E. Jones, General Counsel Mr. Dayne H. Brown, Director Carolina Power & Light Company Department of Environmental, P. 0. Box 1551 Health and Natural Resources Raleigh, North Carolina 27602 Division of Radiation Protection P. 0. Box 27687 Raleigh, North Carolina 27611-7687 Mr. H. A. Cole Special Deputy Attorney General Mr. Robert P. Gruber State of North Carolina Executive Director P. 0. Box 629 Public Staff - NCUC Raleigh, North Carolina 27602 P. 0. Box 29520 Raleigh, North Carolina 27626-0520 U.S. Nuclear Regulatory Commission Mr. C. R. Dietz Resident Inspector's Office Manager, Robinson Nuclear Project H. B. Robinson Steam Electric Plant Department Route 5, Box 413 H. B. Robinson Steam Electric Plant Hartsville, South Carolina 29550 P. 0. Box 790 Hartsville, South Carolina 29550 Regional Administrator, Region II U.S. Nuclear Regulatory Commission Mr. Heyward G. Shealy, Chief 101 Marietta Street Bureau of Radiological Health Suite 2900 South Carolina Department of Health Atlanta, Georgia 30323 and Environmental Control 2600 Bull Street Mr. R. Morgan Columbia, South Carolina 29201 General Manager H. B. Robinson Steam Electric Plant P. 0. Box 790 Hartsville, South Carolina 29550
DISTRIBUTION Docket Filet NRC PDR Local PDR S. Varga 14-E-4 G. Lainas 14-H-3 E. Adensam 14-B-20 L. Reyes RII P. Anderson 14-B-20 R. Lo 14-B-20 OGC 15-B-18 E. Jordan MNBB-3302 T. Sullivan Robinson File ACRS (10)
P-315