PH adjusting system and PH adjusting method

Induced nuclear reactions: processes – systems – and elements – Reactor protection or damage prevention – Corrosion or damage prevention

Reexamination Certificate

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C376S305000, C376S277000

Reexamination Certificate

active

08040997

ABSTRACT:
A pH adjusting system includes a water pit for refueling35that is disposed in a reactor container10, which stores a reactor, and is capable of storing cooling water and a pH adjusting apparatus37that is disposed above the water pit for refueling35and houses a pH adjuster. The pH adjusting apparatus37causes a pH-adjusted solution generated by dissolving or mixing the pH adjuster to flow out to the water pit for refueling35below the pH adjusting apparatus37. Consequently, even when it is difficult to dispose the pH adjusting apparatus on a floor of the water pit for refueling, it is possible to suitably perform pH adjustment in the reactor container10.

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J. A. Reinhart Site Director, Fort Calhoun, Unit 1, Licence Amendment Request (LAR) “Change of Containment Building Sump Buffering Agent from Trisodium Phosphate to Sodium Tetraborate”, NRC public documents, Nuclear Regulatory Commission, pp. 1-29, Aug. 21, 2006.
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International Search Report of PCT/JP2008/053536, date of mailing May 13, 2008.

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