Trip spikes

All fortified (spiked) matrix samples are prepared in the laboratory at the same concentration. Laboratory spikes are immediately put into cold storage. Trip and fleld spikes are kept cold and sent to the fleld. The trip spikes will accompany sample shipments. The fleld spikes are stored and transported in the same manner as the trip spikes. When practical, air should be pulled through fleld spikes in the same manner as actual fleld samples being taken at the time of the study. 

If a matrix is not represented in a SDG, then no spiked sample is required for that matrix. If the region or samplers have identified a particular sample to be used for the spike, the laboratory must use an aliquot of that sample. If the region or samplers have not identified a specific sample for spiking, then the laboratory may choose a sample from the SDG however, the sample chosen must not be a sample identified by the region as a field or trip blank. 

Whip is drawn back and secured. A tripwire is then latched to the whip and the wire Is strung across the trail. When a man trips the wire, the bamboo Is released, and whips around, striking the victim with the spikes. 

Preparation of spiked field blanks is also required to check on the recovery of a spiked analyte of interest in a clean matrix. Spiking solutions are prepared by laboratory personnel prior to field trips. Preparation of spiked field blanks also serves to monitor the stability of the spiking solution in a clean matrix, and to check the accuracy of its preparation. The analytical results of the spiked field blanks and the spiked field samples (which are prepared at the same time in the field) are compared to see if the analytical measurement process is indicating analyte recovery at the same level in a natural sample (the presence of matrix effects) as in a blank (no matrix effects). 

In calculating the amount of fission products released to the secondary side together with the escaping primary coolant volume, the spiking that occurs as a consequence of the reactor shutdown or reactor trip has to be considered in addition to the preceding fission product steady-state concentrations in the primary coolant. In this context, it is important to take into account the timetable of the two events. As was described in Section 4.3.1.2., the doubling time of the concen-... 

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