17.08.2015   IAEA RADIATION TECHNOLOGY SERIES No

Tracers and tracer injection

As indicated in Fig. 77, three radioactive tracers were used in the test, HTO, 14C tagged KSCN and 60Co tagged K3[Co(CN)6]. In the test, 20 mCi of 14C tagged KSCN was injected into well 20-2 on 10 July 2005, and 10 Ci of HTO, together with 25 mCi of 60Co tagged K3[Co(CN)6], was injected into well 21-3 on 11 July 2005.

1.6.2. Tracer responses

All tracers were detected in corresponding production wells:

• The 14C from well 20-2 was found on 30 January 2006 at well 12-3, 204 d after injection.

• The HTO from well 21-3 was found on 30 November 2005 at well 13-4, 141 d after injection, and was found on 23 January 2006 at well 13, 195 d after injection.

• The 60Co from well 21-3 was found on 05 January 2006 at well 13-4, 177 d after injection.

Tracer injection and directional tracer movements are shown in Fig. 78.

Подпись: C-14 of Well 20-2 Response at Well 12-3 Days after Tracer Injection FIG. 79. Carbon-14 of well 20-2 response at well 12-3.

PORO software simulation was used for tracer data treatment. Tracer response curves are shown in Figs 79 and 80.

Подпись: FIG. 80. HTO and 60Co of well 21-3 response at well 13-4.

141 192 222 243 266 286 304 324 342 364 398 454 524 573 674
Days after Tracer Injection

Appendix II