ML20151A572
| ML20151A572 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 11/19/1975 |
| From: | Purple R Office of Nuclear Reactor Regulation |
| To: | |
| Shared Package | |
| ML20151A570 | List: |
| References | |
| NUDOCS 8011030794 | |
| Download: ML20151A572 (4) | |
Text
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UNITE STATES A - '
NUCLEAR REGULATORY COMMISSION WASHINGTON. D.
C. 20555 YANKEE ATOMIC ELECTRIC COMPANY DOCKET NO. 50-29 YANKEE NUCLEAR POWER STATION (YANKEE-ROWE)
AMENDMENT TO FACILITY OPERATING LICENSE Amendment No. 20 License No. DPR-3 1.
The Nuclear Regulatory Commission (the Commission) has found that:
A.
The application for amendment by Yankee Atomic Electric Company (the licensee) dated October 28, 1975, complies with the standards and requirements of the Atomic Energy Act of 1954, as amended (the Act), and the Commission's rules and regulations set forth in 10 CFR Chapt 3r I; B.
The facility will operate in conformity with the application, the provisions of the Act, and the rules and regulations of the Commission; C.
There is reasonable assurance (i) that the activities authorized by this amendment can be conducted without endangering the health and safety of the public, ano (ii) that such activities will be conducted in compliance with the Commission's regulations; and D.
The issuance of this amendment will not be inimical to the common defense and security or to the health and safety of the public.
2.
Accordingly, the license is amended by a change to the Technical Specifications as indicated in the attachment to this license amendment and Paragraph 3.A.(2) of Facility License No. DPR-3 is hereby amended to read as follows:
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" (2) Technical Specifications
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The Technical Specifications contained in' Appendix A, a's revised, are hereby incorporated in the license.
The licensee shall operate the facility in accordance with the Technical Specifications, as revised by issued changes thereto through Change No.125."
3.
This license amendment is effective as of the date of its issuance.
FOR THE NUCLEAR REGULATORY C0hMISSION Original signed by:
W A. Purple Robert A. Purple, Chief Operating Reactors Branch #1 Division of Reactor Licensing
Attachment:
Change No.125 to +.Fe Technical Specifications Date of Issuance: NOV 191975
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ATTACINENT TO LICENSE AMENDMENT NO. 20
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CHANGE NO.125 TO TriE TECIINICAL' SPECIFICATIONS'
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FACILITY OPERATING' LICENSE-NO. DPR-3 DOCKET NO. 50-29.
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.Revisc Appendix A as follows:
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Recove pago 213:9 and insert revised page 213:9.
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Form MC.318 (Rev. 9 5)) MCM 0240.
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213:9 During the autoclave test, cooling air at.100 F was supplied by 0
two fans capabic of furnishing a total of 1,100 cfm.
For determination of maximum plant air cooling requirements for 24 mechanisms, tests were conducted as follows:
2 fans running Mechanism operating 1 fan running Mechanism operating 1 fan running Mechanism holding 0 fan running Mechanism holding Under these conditions, the various coil temperatures and the air flow were measured.
This data was applied to maximum plant cooling requirements (eight mechanisms operating and 16 holding) using 400 F as the maximum 0
allowabic coil temperature for satisfactory coil life.- A total of 9,600 0
0 cfm of cooling air at 100 F with a 20 F rise will be required.,
Primary Rod Position Indication y'
The primary rod position indicating scheme consists of 720 trans-formers which are mounted around the pressure housings of the control rod extensions.
Six fuses per control rod are mounted in the vapor container.
There are 720 light emitting diodes (LED) mounted in vertical columns on l125 the front of the control board.
The primary rod position indication scheme is shown on page 213:10.
This portion of the " Reactor Control System" consists of thirty 3 in, trans-formers per control rod._ These are mechanically conn'ected to facilitate handling. They are mounted around the pressure housing designed to contain the control rod drive shaft. The primary windings of five transformers, suitably staggered to avoid loss of any two consecutive transformers, are in series and are designed to maintain an essentially constant primary current.
j Each secondary winding has across it a LED.
They are mounted in vertical columns on the control board.
The individual LED position corresponds to its
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respective transformer secondary position around the control rod drive shaft.
j As the control rod is withdrawn from the reactor, the increased permeability 12,a of each successive transformer increases the coupling between the primary j
and secondary winding enough to cause the LED's to successively light and, in effect, give a positive column type indication of each individual control rod position.
One of these columns is included for each of the 24 control rods. The accuracy is sufficient for power plant. operation, and is within j 3 in.
Secondary Rod Position Indication The secondary rod position indicating scheme consists of four self-l125 synchronous transmitters mounted on the control rod cam shaft extensions in the power supply for the control rod mechanisms and four self-synchronous jl25 receivers mounted on the control board.
There are also four digital read-out (125 indicators mounted on the control board with provision for manual reset.
The synchronous transmitters cause the similar control board unit to rotate in synchronism which cause motion of the digital read-out device.
The unit counts the number of revolutions made by the cam shafts and gives an indication of each rod group position to an accuracy of + 1/8 in.