Jan 10, 2024:
The cooling packages for T1/T2 was drained this morning. ~150 L from each of the cooling package reservoirs + expansion tank was drained to the BL1A holding tank. The holding tank held ~400 L initially and is therefore now filled to ~700 L (out of a 800 L capacity). We will likely drain the holding tank in the following morning at which point this ELOG will be updated.
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UPDATE (Feb 01, 2024): After recieving instruction from RPG to drain the holding tank to the active sump (due to delays in completing Tritium sample tests), we mistakenly drained ~50L of the 1A holding tank water to the city sewage system (initially it held ~610L and after the draining it read ~580L). This error was caused by misinterpretation of the 1A tank draining systems/procedure. In fact, it is uncommon for RH to pump active water from the 1A holding tank into the sump. It is also unclrear whether a valve configuration to do so exists (if it does, no flow reading can be taken).
However, because of this error, we learned that the plumbing to the city water drain is slightly blocked (see image).
Our plan of action moving forward will be to wait for the Tritium results and coordinate with RPG to determine the appropriate next steps.
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UPDATE (May 02, 2024): The active sump level was inspected visually on April 29 and it was noticed that it was close to full. 1x 1L and 2x 20mL samples were then collected and passed to RPG for testing. When RPG completes their Tritium analysis, we will drain both the holding tank and the active sump. See this link.
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UPDATE (Aug 06, 2024): The tritium analysis was finally completed for T1/T2, since the sump only received high active water from the removed T1 target ladder, tritium analysis for the sump water would have been covered by the T1/T2 analysis. Gamma spectroscopy was done for the active sump (here). The draining procedure will be recorded in a separate ELOG.
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