ML14190A318
| ML14190A318 | |
| Person / Time | |
|---|---|
| Site: | Robinson  |
| Issue date: | 06/06/1979 |
| From: | Lainas G Office of Nuclear Reactor Regulation |
| To: | Schwencer A Office of Nuclear Reactor Regulation |
| References | |
| NUDOCS 7907180899 | |
| Download: ML14190A318 (4) | |
Text
MEMORANDUM FOR: A. Schwencer, Chief, Operating' Reactors Branch #1, Division of Operating Reactors, FROM:
7G.
Lainas, Chief, Plant Systems Branch!, Divisi6n of Qperating Reactors
SUBJECT:
-H.' B. ROBINSON PLANT, UNIT NO. 2, REQUEST FOR ADDITIONAL INFORMATION FOR DEGRADBD GRID VOLTAGE (TAC-10049)
Plant Name: H. B. lRobinson Plant. Unit No. 2 Docket No.:
50-261 Responsible Branch:
ORB #1 Protect Manager: J. Neighbors Reviewing Branch:
Plant Systems Branch Status: Awaiting Information In response to technical assistance-request TAC 10049, the Plant Systems Branch has reviewed the licensee's submittal of January 24, 1979 and found that additional information is required in order to compdete our review.
The attached request for additional information should be forwarded to the licensee as soon as possible.
G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
Contact:
S., Rhow, X28077
Enclosure:
As -stated cc w/enclosure:
See next pgge 7
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WASHINGTON, D. C. 20555 JUN 6 1979 MEMORANDUM FOR: A. Schwencer, Chief, Operating Reactors Branch #1, Division of Operating Reactors FROM:
G. Lainas, Chief, Plant Systems Branch, Division of Operating Reactors
SUBJECT:
H. B. ROBINSON PLANT, UNIT NO. 2, REQUEST FOR ADDITIONAL INFORMATION FOR DEGRADED GRID VOLTAGE (TAC 10049)
Plant Name: H. B. Robinson Plant Unit No. 2 Docket No.:
50-261 Responsible Branch:
ORB #1 Project Manager: J. Neighbors Reviewing Branch:
Plant Systems Branch Status: Awaiting Information In response to technical assistance request TAC 10049, the Plant Systems Branch has reviewed the licensee's submittal of January 24, 1979 and found that additional information is required in order to complete our review, The attached request for additional information should be forwarded to the licensee as soon as possible, G. Lainas, Chief Plant Systems Branch Division of Operating Reactors
Contact:
S. Rhow, X28077 J. Ibarra, LLL
Enclosure:
As stated cc w/enclosure:
See next page
-2 cc w/enclosure:
V. Stello D. Eisenhut R. Vollmer B. Grimes W. Russell J. Neighbors G. Lainas D. Tondi P. Shemanski S. Rhow
REQUEST FOR ADDITIONAL INFORMATION H. B. ROBINSON PLANT, UNIT 2 DEGRADED GRID VOLTAGE (TAC 10049)
- 1.
Provide the voltage trip point on the 4160V side for the second level voltage protection monitors.. It is.stated as 86 percent on the 480 volt bus with a time delay of 10 seconds. A Technical Specification Change is required to incorporate this set point and time delay.
- 2. Describe the load shedding sequence showing the interaction of onsite power with the load shed feature. Refer to Position 2 (NRC letter, "Safety Evaluation and Statement of Staff Positions Relative to Emer gency Power Systems for Operating Reactors", dated 6/2/77).
- 3. It is required that the Technical Specifications include a test require ment to demonstrate the full functional operability and independence of the onsite power sources at least once every 18 months during shutdown.
Refer to Position 3 (NRC letter, Safety Evaluation and Statement of Staff Positions Relative to Emergency Power Systems for Operating Reactors",
dated 6/2/77).
State the frequency of checks, calibration, functional tests, and operating surveillance modes. Provide proposed Technical Specifications addressing testing,