ML19225D098
| ML19225D098 | |
| Person / Time | |
|---|---|
| Site: | Pilgrim |
| Issue date: | 06/19/1979 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Andognini G BOSTON EDISON CO. |
| References | |
| NUDOCS 7908060544 | |
| Download: ML19225D098 (3) | |
Text
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UNITED STATES
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NUCLEAR REGULATORY COMMISSION
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WASHINGTON, D. C. 20555 5..
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JUNE i 9 E9 i..
=p :. u Docket No. 50-293
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Mr. G. Carl Andognini
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Boston Edison Company 800 Boylston Street Boston, Massachusetts 02199
Dear Mr. Andognini:
We are reviewing your submittal of August 24, 1977, regarding proposed changes to the Pilgrim Nuclear Power Station Technical Specifications
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to incorporate additional electrical power system surveillance requirements.
We have determined that the additional information requested in the enclosure is necessary in order to complete our review.
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To enable us to maintain a review schedule consistent with our
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objective of resolving this issue by the end of 1979, please submit
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the requested information within 90 days of receipt.
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We appreciate your cooperation on this issue.
Sincer y,
NW i '(w uw bl...
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o,as A. I polito, Chief Os rating eactors Branch #3 sL=
Division Operating Reactors Eff-
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Enclosure:
Request for Additional Infomation i.E~
cc w/enelosure:
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see next page
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7 9,0-80 60s4Y 416 003
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Mr. G. Carl Andognini
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Pilgrim Station Acting Manager Boston Ediso.n Company
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RFD 71, Rocky Hill Road
- 1 Plymouth, Massachusetts 02360 E
Anthony Z. Roisman Natural Resources Defense Council 91715th Street, N. W.
Washington, D. C.
20005 Ii Henry HerrTnann, Esquire 5[;i -
Massachusetts Wildlife Federation 151 Tremont Street g
Boston, Massachusetts 02111 i.; --
Plymouth Public Library North Street
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Plymouth, Massachusetts 02360
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REQUEST FOR ADDITIONAL INFORMATION PILGRIM UNIT N0. 1 DEGRADED GRID VOLTAGE (TAC 10041)
- 1. Table 3.2.B Instrumentation That Initiates or Controls the Core and Containment Cooling Systens, Boston Edison Company letter to NRC, dated August 24, 1977, gives a degraded voltage trip point of 3798 volts with 5.2 seconds time delay.
The time delay appears to be too short and could cause a oroblem with short duration power disturbances.
Provide the analysis and isis fcr your selection of the 5.2 second time delay,
- 2. State and describe total number of channels per bus in your system for the second level undervoltage protection.
State applicable operating i
modes and action.
Refer to Table 3.3-3, Engineered Safety Feature r
Actuation System Instrumentation, NRC letter dated June 2,1977 (Safety Evaluation and Statement of Staff Positions Relative to the Emergency Power Systems and Operating.)
- 3. The voltage monitors shall be designed to satisfy the requirements of IEEE Std. 279-1971, " Criteria for Protection Systems for Nuclear Power Generating Stations." State your compliance with this requirement, and include sufficient description for us to verify compliance of your design.
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416 010
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