So, when TEPCO did the repair on that joint on Sunday their time, and said there were at least 6 others like that, the company didn't bother to change the other 6 at the same time.
So I guess there may be at least 5 more leaks to go.
From Yomiuri Shinbun (12:17PM 7/12/2011):
東京電力は１２日、福島第一原子力発電所の汚染水処理システムが午前８時５１分に緊急停止したと発表した。
TEPCO announced on July 12 that the contaminated water treatment system stopped at 8:51AM at Fukushima I Nuclear Power Plant.
システムのうち、仏アレバ社の沈殿・除去装置で薬液を注入する配管の接続部付近から水漏れが見つかったためで、原因を調査中。システム再開の見通しは立っていない。原子炉への注水は継続している。
A leak was found near the coupler that joins the hose that injects chemical to AREVA's coagulation/coprecipitation unit. The cause of the leak is being investigated, and it is not known when the system will be re-started. The cooling of the reactors using the treated water continues regardless.
東電によると、同４０分ごろ、作業員が水漏れに気づき、手動停止した。１０日に薬液混じりの汚染水約５０リットルが漏れ出すトラブルがあった場所の近くで、この時はポリ塩化ビニール製の継ぎ目を金属製のものと交換、１３時間後に復旧させた。今回の水漏れとの関係は不明。
According to TEPCO, a worker noticed the leak at about 8:40AM, and manually stopped the system. The leak was near the spot where 50 liters of contaminated water with chemical had leaked on July 10. The PVC coupler had been replaced with a metal one, and the system was re-started after 13 hours. It is not known if today's leak has anything to do with the previous leak nearby.