b'Figure 5. (a) Posttest appearance of LOCA Burst & fragmentation test sample HBR#, (b) fragmented fuel particles collected : (a) <0.125 mm; (b) 0.1250.250 mm; (c) 0.2500.500 mm; (d) 0.5001.00 mm; (e) 1.002.00 mm; and (f) >2.00 mm.Figure 4 shows the post-test LOCA burst3. Sieve analysis and strain measurementFigure 6. Size distribution of fuel & fragmentation test HBR#1 sample.were performed. The total fuel collectedfragments collected after ORNL In FY 18, ORNL performed a LOCAfrom HBR#1 sample was 59.8 g. A fewBurst & LOCA fragmentation and shake testing.test with a North Anna high burnupfine particles can be seen in Figure 5. specimen in a full LOCA sequenceThe fragment size distribution of the at 1200C, and the HBR specimenfuel collected after LOCA fragmentation was tested up to 1,000C withoutand shake testing of the HBR#1 sample water quench. Although the claddingwas quantified, and the result is shown geometry and cladding material werein Figure 6.different between these tests, their burst temperatures were remarkably close, around 770C. However, the HBR sample had a relatively small balloon and burst opening, as shown in Figure 2019|AFC ACCOMPLISHMENTS 145'