ML19347B872
| ML19347B872 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 09/16/1980 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Kay J YANKEE ATOMIC ELECTRIC CO. |
| References | |
| TASK-06-07.B, TASK-06-07.C, TASK-06-10, TASK-07-03, TASK-08-02, TASK-08-03, TASK-6-7.B, TASK-RR NUDOCS 8010160126 | |
| Download: ML19347B872 (3) | |
Text
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UNITED STATES y
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NUCLEAR REGULATORY COMMISSION 3
l WASHINGTON, D. C. 20555 a
1
%.,,,,8 September 16, 1980 1
Docket No. 50-29 l
Mr. James A. Kay Senior Engineer - Licensing Yankee Atomic Electric Cowany 25 Research Drive
)
i Westborough, Massachusetts 01581
Dear Mr. Kay:
RE: REQUEST FOR ADDITIONAL INFORMATION ON SEP TOPICS VI-7.B, VI-7.C.
VI-10, VII-3, VIII-2 AND VIII-3 (YANKEE R0WE ATOMIC POWER STATION)
We are continuing our review of SEP Topics VI-7.B. ESF Switchover from Injection to Recirculation Mode; VI-7.C, ECCS Single Failure Criteria; VI-10.A, Testing of Reactor Trip System and ESF; VI-10.B, Shared Engineered Safety Features; VII-3, Systems Required for Safe Shutdown; VIII-2, Onsite Emergency Power Systems - Diesel Generator; VIII-3.A, Station Battery Test Requirements and VIII-3.B DC Power System Bus Voltage Monitoring and Annuniciation. We have found that additional information described in the enclosure to this letter is needed.
We request your response within 45 days of your receipt of this letter.
Sincerely, Dennis M. Crutchfield, Chie Operating Reactors Branch a Division of Licensing
Enclosure:
Request for Additional Information on SEP Topics cc w/ enclosure:
See next page 8910160 l%
Mr. Janes A. Kay September 16, 1980 cc w/ enclosure:
Mr. Janes E. Tribble, President Yankee Atomic Electric Conpany 25 Research Drive Westborough, Massachusetts 0158i Greenfield Community College 1 College Drive Greenfield, Massachusetts 01301 Chairnan Board of Selectmen Town of Rowe Rowe, Massachusetts 01367 3
Energy Facilities Siting Council 14th Floor One Ashburton Place i
Boston, Massachusetts 02108 Director, Technical Assessment Division Office of Radiation Programs (AW-459)
U. S. Environmental Protection Agency Crystal Mall #2 Arlington, Virginia 20460 U. S. Environmental Protection Agency Region 1 Office ATTN: EIS C0ORDINATOR JFK Federal Building Boston, Massachusetts 02203 Resident Inspector Yankee Rowe Nuclear Power Station c/o U.S. NRC i
Post Office Box 28 i
Monroe Bridge, Massachusetts 01350 e
i Richard E. Schaffstall l
KMC, Incorporated 1747 Pennsylvania Avenue, N. W.
Washington, D. C.
20006
=.
REQUEST FOR ADDITIONAL INFORMATION ON SEP TOPICS VI-7.B. VI-7.C. VI-10. VII-3, VIII-2 AND VIII-3 As a result of our preliminary review of the subject topics, we will need the information described below in order to determine:
(1) how many in-verters may be placed on a single power supply during operation or while shutdown, and (2) the potential consequences of losing such power supplies.
1.
Quantify the number of instrument inverters in your olant and for each inverter:
a) identify the inverter and its power supplies; and b) describe the switching features that are provided to switch inverter power supplies and inverter loads (including synchronization circuits).
2.
Provide the requirements for:
a) testing the transfer path's described in your responses to 1 above, and b) limiting the number of redundant load groups that may be placed on any maintenance power source during each operating condition.
3.
Describe the consequence of one or more load groups on a single dc i
source losing power (e.g. automatic initiation of ECCS, automatic initiation of transfer from ECCS injection nade to recirculation mode, loss of indication in the control room, loss of annunciators, loss of plant communications, loss of emergency telephones).
- a w