Purolite Nuclear Power Products

Case Studies

Nuclear Power Plants

Purolite nuclear grade NRW ion exchange resins are designed exclusively for use in Nuclear Power operations and backed by a full-service technical support team. Purolite’s diverse NRW nuclear grade product line meets the highest published quality specifications required by nuclear power industry worldwide and allows power plants to address all areas of water purification within nuclear operations.

Nuclear systems require:

  • Highly regenerated resin to maintain high-purity makeup

  • Specialty nuclear resins for chemical control of coolant protecting nuclear fuel and addressing nuclear isotopes that are present

  • High capacity resins for extended service life in polishing boiler water

  • Extremely low-residual organic chloride and sulfate release form resins to prevent condensate contaminants while removing corrosion by-products

We partner with you to optimize savings and continually develop products and services and seek methods to reduce operating costs. Our technical experts are ready to offer application, resin and system modification assistance while providing attention to system detail without introducing risk.

Applications for Nuclear Grade Resins

Polishing requirements for makeup water (MU)
Regenerable resins such as NRW100 and NRW400 will perform the bulk of the demineralization and mixed bed polishing followed by a the non-regenerable mixed bed UCW3710 for final polishing of trace ions and minimizing TOC release form the resin. This makeup water will be used in all nuclear systems.

Nuclear grade resin for deep bed condensate polishing(CP)
Specialty condensate polishing resins SGC650H and SGA550OH or the premix mixed bed NRW1200 are designed for PWR Polishers. For those preferring visual benefit and fouling tolerance of macroporous anions NRW5050 is a proven product. Non Regenerable PWR and BWR deep bed polishers will find NRW1160 and NRW8000 beneficial with these low organic sulfate and organic chloride releasing resins.

Chemical volume control (CVCS) during full power
Resin layering technology in the CVCS, uses proven macroporous specialty resins including the orthoporous NRW5010XLC or NRW5070XLC for colloidal activity, the cation NRW160 for high selective removal of metals including Cs, Co, and Ni, and the specialty mixed bed NRW3560XLC for final polishing. This technology has a 20 plus year record of exceptional results. The XLC version of the anions insures no chloride issue during PWR startup with high Boron and Lithium concentrations.

Radioactive waste cleanup
Removal of isotopes and ionic impurities from waters planed for reuse of discharge are properly addressed with the specialty mixed bed NRW3560 or the slightly more economical mixed bed NRW3240. Use of the layered specialty macro anion NRW5010 or NRW5070 and the macroporous cation NRW160 during outage cleanup generally improves treatability of wastewater collected during outage. In the event there are difficult isotopes in the radwaste stream there are many selective resins available for specific situations.

Nuclear grade resin for reactor water cleanup (RWC)
The layered technology discussed above is applicable for BWR reactor water deep bed demineralizers with affinity for fine colloids and excellent selectivity for Co60. 

Outage cleanup with high ionic loads and fine colloids
The layered technology discussed above, was introduced by Purolite primarily for outage beds as this is where the greatest colloid and ionic load is generated during the cleanup oxidizing phase. The cleanup bed has affinity for fine colloids and high selectivity for Co58. With continuous use this technology is included in best practice for source term reduction by the nuclear industry.

Steam generator blow down (SGBD) recovery
Specific resins have been developed for use in polishing steam generator blow down for reuse. Our low sodium cations NRW160LS and NRW1160LS are specific for plants that do not regenerate and will operate polishing demineralizers months beyond a conductivity or amine break while controlling release of Na. The complimenting mixed beds NRW3560LS and NRW3675LS also employ low sodium cation components supporting long term service of the blowdown demineralizer for reuse. If resins are regenerated or operated in other configurations, there are many resins available to complement your system operation.

Spent fuel pool (SFP) cleanup
Resins polishing spent fuel coolant encounter aggressive oxidative conditions resulting in sulfate accumulation after a short period of service. The high crosslinked cation NRW1180 or the mixed bed NRW3860 incorporating this cation have shown extended life in this environment. Use of these resin and possible other practices such as short loading may assist to improve demineralizer resin life. If difficult isotopes are present in the pool selective resins are available such as NRW5330B with high affinity for Antimony and other trace metals.

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