More Crap Service Water Piping At Seabrook!

“replace degraded SW piping with a corrosion resistant material: AL-6XN austenitic stainless steel material

SeabrookNuclear Station's "Crap" Service Water Piping System

Senator Shaheen's Help With Seabrook's Deteriorated Service Water Piping

Seabrook's Crap Service Water System

So now the truth comes out. I have gone over a lot of Seabrook’s documents with degraded service water pipes. I knew Seabrook used inappropriate piping materials leading to premature corrosion and pipe leaks. The Seabrook solution was to put a ban aid on the gaping pipe wound...the cement liner and plastisol lined pipe. The foreign material lined piping caused a flow reduction and the material has sloughed off causing blockage in other areas of the plant including the diesel generator.

"...replaced degraded Plastisol-lined service water (SW) piping on the supply and return of the ‘A’ and ‘B’ emergency diesel generator (EDG) heat exchangers and degraded cement-lined SW piping on the supply side of the ‘A’ primary component cooling water (PCCW) heat exchanger..."

Most troubling in all the Seabrook and NRC degraded service water documents...the NRC and Seabrook never admitted the root cause of their trouble was inappropriate pipe metal. Because if they admitted it, all the piping would have needed to be replaced.

Just to be clear, if all of the service water piping was made of AL-6-XN austenitic stainless steel, there never would have been a need of any plastisol or cement service water piping liners. The NRC says this piping was degraded, why wasn't this in a LER and why wasn't Seabrook forced into a tech spec LCO?  

It just  gets you wonder how much more safety information they withhold from the public because it reflects bad on the agency. 

April 28, 2015: SUBJECT: SEABROOK STATION, UNIT NO. 1 – NRC EVALUATION OF CHANGES,  TESTS, AND EXPERIMENTS AND PERMANENT PLANT MODIFICATIONSTEAM INSPECTION REPORT 05000443/2015007 Service Water Piping Replacement for the Diesel Generator and Primary ComponentCooling Water Heat Exchangersa. Inspection Scope The team reviewed EC 274172 which replaced degraded Plastisol-lined service water (SW) piping on the supply and return of the ‘A’ and ‘B’ emergency diesel generator (EDG) heat exchangers and degraded cement-lined SW piping on the supply side of the ‘A’ primary component cooling water (PCCW) heat exchanger. NextEra performed the modification to replace degraded SW piping with a corrosion resistant material to ensure long-term system pressure boundary integrity. NextEra replaced the carbon steel lined piping with AL-6XN, an austenitic stainless steel material, suitable for seawater service without the need for internal lining or protective coating. 

The team reviewed the modification to determine if the design basis, licensing basis, or performance capability of the EDG, PCCW, and SW systems had been degraded by the modification. The team interviewed design engineers and reviewed design drawings and calculations to determine if the new SW piping met design and licensing requirements.
Additionally, the team reviewed non-destructive examination (NDE) results and associated maintenance work orders to determine if NextEra appropriately implemented the modification. The team performed several walkdowns of the accessible portions of the replaced SW piping, including a walkdown during a prolonged ‘A’ EDG run on March 5, 2015, to verify that NextEra had adequately implemented the modification, maintained pressure boundary integrity and configuration control, and had not impacted the function of other safety-related SSCs located in the vicinity. The team also reviewed corrective action CRs and the EDG, PCCW, and SW system health reports to determine if there were reliability or performance issues that may have resulted from the modification. Additionally, the team reviewed the 10 CFR 50.59 screen and engineering evaluation associated with this modification. The documents reviewed are listed in the Attachment.